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Патент USA US2405618

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Aug. 1-3, 1946.
.
‘ _
E. M. SMITH
.
2,405,518
PERMUTATICN CODEDA‘I'A TRANSMISSION SYSTEM
Filed May 1-2, 1943
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PERMUTATION “CODE DATA. TRANSMISSIQN SYSTEM
' Filed May 12, 1943
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ATTORNEY *
Aug. 13,1946.
'E. M. SMITH
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PERMUTATION CODE DATA'TRANSMISSION SYSTEM
Filed May 12, 1943
5 Sheets-Sheet 4
/N VEN TOR
E M SMITH
5v 9%.‘ a. _.
A Tram/EV
Patented Aug. 13, 1946
2,405,618 '
UNITED STATES PATENT OFFICE
2,405,618
PERMUTATION coma DATA TRANSMISSION
SYSTEM
Edward M. Smith, Montclair, N. 3., assignor to
Bell Telephone Laboratories, Incorporated, New
York, N. Y., a corporation of New York
>
Application May 12, 1943, Serial No. 486,652
1
5 Claims._ (Cl. 177—353')
Thisinvention pertains to high speed permu
tation code signal data transmission systems and
to telemetering systems.
More particularly this invention is an improved
permutation’code signal data transmission sys
tem or telemeteringsystem requiring a minimum
of conductors or transmission channels intercon
2
cuits simultaneously, 'each of said selecting cir
cuits being capable of making an independent
selection and all selections cooperating to de
?ne the separate digits of a four-digit number
simultaneously.
I
'
A further feature of this invention is an ar
rangement of ?ve separate selecting circuits con
necting the data measuring'station and receiving
station for designating any of 3,000 observations
trolled by ?ve transmission channels serving, said
measured are progressively increased. In this
present embodiment the invention is arranged ~
to cover a'range‘of 3,000 observations or measure
the ?rst hundredth of a unit setting of a measur
times in response to a condition impressed on it
ments. It is assumed that the quantity measured
by the one channel, while a second selecting cir
extends over a range from zero units to thirty
cuit is controlled by means of conditions im
circuits in common; which arrangement includes
or measurements ahnost instantly.
ll) means for impressing permutations of two elec
By means of the data transmission or tele_
trical conditions from each ofv the ?ve channels
metering System of this invention only ?ve con
on the ?rst of the selecting circuits to indicate
ductors or transmission channels are required to
the setting of a measuring instrument to the
interconnect the observing and receiving stations
nearest hundredth of a unit in each of eight
to de?ne almost instantly any of 3,000 observa
zones into which the full unit is divided, which
tions.
_
arrangement includes also means for controlling
' The invention may be employed to de?ne any
the ?rst selecting circuit at times by means of
measured quantity where the quantities to be
one of the ?ve channels only so that it indicates
ing instrument in each of the eight zones at such
units and the system de?nes the measurement
pressed on it by the other four channels to in
vto- the nearest'hundredth of a unit. The system 25 dicate the particular, one of the eight zones in
maybe employed to transmit permutation code
which the measuring instrument is set.
signals de?ning the readings of measuring me
' A further feature of this invention is an ar
ters used for anypurpose.
'
rangement for maintaining four of ?ve selecting
A feature of this invention is an arrangement
circuits in a particular ?xed condition in re
for impressing permutation code signals which 30 sponse to an electrical condition impressed on
completely de?ne arnumber having four- digits
each of four out of ?ve transmission channels to
on a single ?ve-channel telegraph signal circuit
completely de?ne three of the digits in a four
at the same instant.
digit number While the ?fth selecting circuit is
A further feature of this invention is the em
controlled by an electrical condition impressed
ployment at the receiving station of ?ve separate
on the ?fth channel only to determine the digit
relay selecting circuits for the translation of the
in the fourth position of the number.
‘permutation code signals de?ning the digits in
the different places in a multidigit number corre
General description
In the present invention it is assumed that any
selecting circuits are controlled simultaneously 40 quantity in a thirty-unit range is measured to
by a single ?ve-channel permutation code trans
the nearest hundredth of a unit. The measure
mission circuit common to all ?ve selecting cir
ments are translated into various code combina~
sponding to observed or measured data which
cuits.
'
tions of settings of three sets of cams.
One set
‘of cams establishes twenty-?ve permutation
rangement for impressing permutation code sig 45 code settings of a group of contacts to de?ne the
nals which completely de?ne a number having
twenty-?ve different hundredths of a unit set
four digits on a single ?ve-channel telegraph sig
ting in each quarter unit. A second set of cams
nal circuit at the same instant and thereafter im
establishes eight permutation code settings to de
pressing said signals on ?ve separate independ
?ne the eight zones in each unit. The eight zones
ent selecting circuits.
are not equal. Four of them, as will be further
vA further feature of this invention is an ar
explained, each contain thirteen hundredths of
rangement for impressing each of the ?ve ele
a unit and the remaining four each contain twelve
A further feature of this invention is an ar
merits of a ?ve-element permutation code signal
hundredths of a unit.
For convenience herein
individually through a separate one'of ?ve trans
these will be called eighths of a unit. A third
mission channels on ?ve separate selecting cir 55 set of cams establishes permutation code settings
2,405,618
3
4
to de?ne units, groups of ?ve units and groups of
?fteen units. The cams control contacts each of
which is arranged to impress either of two elec
nected also to a third selecting circuit; two to a
fourth selecting circuit and one to a ?fth select
ing circuit.
In the ?rst selecting circuit there are ?ve
trical conditions on a corresponding one of ?ve
conductors or transmitting channels connecting in switches for changing the selecting paths through
the circuit. In the second selecting circuit there
the measuring instrument located at an outly
are; four switches for this purpose. In the third,
ing observing or measuring station to receiving,
second and ?rst selecting circuits there are three,
selecting; and indicatingv apparatus at-a central
two and one switch, respectively. A permutation
receiving or metering station. The permutation
code signals are impressed on ?ve sets of polar - code signal containing ?ve signal elements is im
pressed on the channels to the ?ve selecting cir
receiving relays which are operated in a man
cuits simultaneously. If a change is required in a
ner to correspond to the code. The polar re
digit in the ?rst right-hand position of the num
ceiving relays are in turn connected within the
ber only or in the ?rst two positions for a change
receiving station to ?ve separate-selecting cir-.-~
cuits by means of ?ve local transmission, chan- a» within the same eighth of a unit zone, only one
selecting circuit, namely, the one having ?ve
nels. The ?ve selecting circuits are controlled
switches, will respond while the other four select
simultaneously by the ?ve channels.
The selecting circuits are arranged in the gen?
eral form of fan relay circuits modi?ed; per this
invention, 50 that, in addition to the usual selec- -_
tions made by the cooperation of the various re
lays in each fan circuit under the in?uence of a
tween eighth, of a unit zones and no changeiis re
number of transmission channelslthe relay at the
apex of the fan in each selectingv circuit may at
times make a single selection in response to an .~
electrical condition impressed on onev channel
only‘,_whil_e the selection remains, unaffected by
theiconditlons impressed on the other channels.
By this expedient, it is possible to make a‘selec
tion‘in each of a number oi selecting circuits to
de?ne particular digits,“ such asthe zero digits for
quired in a digit in any higher valued, position
of the number, the second selecting circuit is
arranged to respond to four elements. of the?ve
unit code, while the third,v fourth and ?fth select
ing circuits, remain locked. Sincev each such
transition involves also a change in the right
hand digit of the number, such a transitionwill
be made by the. ?fth selecting circuit under con~
trol of one of the ?ve channels. only. In. general
the various selecting circuits are arranged‘ in
cascade so that when changes are required in
higher valued positions in the number,’ a fewer
example, in certain places of the, number, while
' another selecting circuit responds simutlaneously
to permutation code signals‘ impressed‘ on less
number of transmission channelscontrol aselect
than ?ve,of_ the channelsto indicate a’ digit in, a ;
ing fan circuit with a correspondingly fewer num-l
higher'valu?dzplace in thcnumben.
.
' The‘ selecting ' ‘circuits; cooperate to light four
ber of switches to e?ect the transition while an
numbered lamps to indicate ‘the four digits cor
responding to the setting of the measuring in
electrical condition, impressed. onv single chan
nels, not employed, in effecting the transition in
the digit in the higher. valued positionof the num
strument, thus identifying. the measured‘ quan
ber, effects a transition in each selecting fan cir
cuit for each lower valued digit involved.
tity within‘ the thirty-unit‘ range to‘ the nearest
hundredth of aunit,
‘
ing circuits remain locked. If a change is re
quired in a digit in the second right-hand posi
tion in the number corresponding to a change be
'
‘
_
d
‘
‘
At all times‘?yerelement permutation code sig
'
The speed. of‘ operation of the apparatus‘ofv the
nals are. being. transmitted by the cam controlled
contacts at the receiving station and retransmit
invention herein compares favorably with the
speed of operation of data transmission appara
tus or tele‘inetering apparatus. operating on: the
voltage or resistance balancing methods'of, opera
tion. The numberof transmission channels re
quired is the minimum for a permutation code
ted by the. corresponding ?ve polar receivingre
lays at thereceiving. station. All ?veelements
are employed at times. in setting the switchesof
the hundredths of a unit selector only tov indicate
signal transmission'system capable of‘ as many v;
‘selections.
_,
' ri‘hus advantage may be‘taken of_ the. desirable
characteristics ‘of a. telegraph permutation ‘code
position in which ‘they were set. At‘ other times
as determined by. the value; of the measured quan
signaling system,fname1y, that it is. not. subject
to errors due to variation, in the impedanceof the
channels caused by variations in temperature and
variations in leakance due to'weather changes
which affect other types of such' systems and this
may be achieved with littlaiii any,’ appreciable
sacri?ce in speed; and by employing a,m_inimum
of transmission channels connecting»;v the stations.
It has. been explained that permutation code
signals set up on the cams at the observing or
the. measuring instrument setting within each
eighth divisions of a. unit tov the nearest hun
dredth of a.-unit,_ At such times the selectors for
the higher valued settings are locked in. the last
55
tity, the conditions of four elements‘ of, the five
element code will set theeighth of a unit- selector
to indicate the eighth of a unitsettings. At such
times one switch in the selector for the hun
dredths. of aunit. within each eighth of a, unit
will be controlled by the electrical condition of
the ?fth element. of thecode only to. select the
lowest value hundredth of a. unit in each eighth
of a unit Zone while the selectors for the higher
valued digits will be, locked in the last position
measuring station- are impressed?ve trans-i
mission’ channels tp; operate ?ve sets of polar. re 65 in- which they were set.’ At other times; as re
ceiving relays, at the receiving station. Five: of
quired, the electrical condition of three, elements
the polar relays, one in each- set, impress the
permutation code. signals by means of ?ve local
of the ?ve element code will set the. switches; in
the selector for the indicator de?ning the1 digit
in the units position or the ?rstposition; to the
channels within the receiving station‘ on. the
selecting circuits. All ?ve of the transmission 70 left of the decimal point. A single switch. of the
channels‘interconnecting the polar receiving re
four switches in the selector for the eighth of a
lays and the selecting circuits are. connected‘, to
one of the ?veselecting circuits only. Four of
these ?ve transmission channels are connected to
unit selectionlwill meanwhile besetby theelec
.a second selecting. circuit; three of-v them are con
trical condition impressed on one-channel'onlyto
select all thirteen indicators in‘ the ?rsteighth of
a unit zone. A single switch of; the ?ve switches
5
2,406,618
in the selector for the hundredths of a unit se
lection within each eighth of a unit zone will
meanwhile be set by the electrical condition im
pressed on another single channel to select one of
6
ing the digit in the two left-hand positions of the
‘number when required.
Fig.- 'I is a chart showing the permutation code
signalsset up by camsV‘IIZ, I01 and H3 to H5
in Fig. 1 duringa revolution to de?ne the digits
these thirteen indicators, namely, the zero indi
cator for the hundredths of a unit selection while
in- thetwo left-hand positions of a number cor_ »
the transition is made. The selectors for the
responding to a'measurement which in this case
digits of the number higher in value than the
corresponds to the digits in the units and tens
units digit will be locked meanwhile in the last
position in the number or in the ?rst and. second
position in which they were set. The same gen
positions to the left of the decimal point.
eral procedure is followed for the selection of a
Fig. 8 is a diagram showing the manneriin
‘lamp indicating the digit in the tens position or
which" Figs. 1, 2, 3 and 4 should be arranged,
the second place to the left of the decimal.
each in relation to the other to form an operative
system.
’
'
The invention may be understood from the fol
lowing'description when read with reference to
Detailed description
the associated drawings in which:
Refer now to Fig. 1. Cams IM to I 00 are rig
Fig. 1 shows three sets of cams arranged in
idly
secured to a, ?rst shaft, cams I 01 to II I‘ to a
horizontal rows, The cams are assumed to be
second shaft‘and cams H2 to I I5 to a third shaft.
controlled by a measuring instrument, not shown,
at the transmitting station. The cams control 20 As the measuring instrument, not shown, is ro
tated, the three shafts which are connected to
electrical contacts which set up and transmit per
the measuring instrument by the gear system in
mutation code signals over ?ve electrical trans
any convenient manner are rotated to maintain
mission channels connecting the observing or
the following relationship. As the measuring in
measuring station to the receiving station where
strument changes through the full thirty-unit
they are impressed on ?ve sets of polar relays, the '7;
range cams II 2 to II 5 turn through one revo
armatures of which are set in accordance with
the code in response to the received signals. The
receiving relays impress the received code signals
on ?ve selecting circuits per Figs. 2 and 3.
Fig. 2 shows the upper portion and Fig, 3 the
lower portion of a selecting system comprising
?ve separate relay selecting circuits resembling
fan circuits which respond to the code signals re
transmitted from the polar receiving relays in
Fig. 1 to translate the codes received by them
from the cams into lamp selections in the indi
cator circuit per Fig. 4.
Fig. 4 is an indicator circuit comprising essen
lution. As the measuring instrument changes
through a range of one full unit, cams I01 to III
turn through one revolution.
.
Cams H3 to H5 are so arranged that as they
rotate through a complete revolution they set up
thirty permutations of contacts I10 to I13 to‘
de?ne each of the’thirty full units. The periph
eries 0f cams I I2 to I I5 are arranged in two levels.
Where the ‘periphery of the cam is raised the
corresponding contact is open. Where the pe
riphery of the cam is depressed the corresponding
contact is closed. Cams I01 to H0 are arranged
so that as they rotate they operate their respec
tially a bank of one hundred lamps, shown at the
tive contacts to set up eight di?erent permuta
right, which indicates the setting of the measur 40 tions of open and closed circuit conditions to
ing instrument to the nearest hundredth of a
de?ne eight different eighths of a, unit changes in
unit. The ?gure shows also a bank of ten lamps
setting of the measuring instrument within each
arranged in a vertical row which correspond to
unit. Cam'I I I is a ground supply switching cam
the numeral in the units position or in the ?rst
employed to supply ground at the proper inter
position to the left of the decimal point. To the 45 vals “to the top row of cams.
left of the group of ten vertical lamps is a group
The‘peripheries of cams I01 and III each have
of three lamps arranged also in a vertical row
two levels. Where the periphery of cam I 01 is
which correspond to the numeral in the tens place
raised, contact I62 is open and where it is normal
or in the second position to the left of the deci
contact I62 is closed. Where the periphery of
mal point. Only 3,000 selections are made by the 50 cam II I is normal contact I09 is open and where
system of the invention in its present form so only
it is raised contact I08 is closed. The periph
three lamps are required for the ‘tens digit. It
eries of cams I08, I09 and H0 each have three
is to be understood, however, that the system of
levels. At their highest level these cams close
the invention is capable of unlimited expansion '
and is not limited to the de?nition of 3,000 meas
urements only.
Fig. 5 is a chart showing the permutation code
their respective contacts I63, I65 and I01. Where
55 the peripheries of cams I08, I09 and H0 are nor
mal their respective contacts I63 to I68 are all
open. Where the peripheries of cams I08, I09
signals set up by the bottom row of cams, cams
and H0 are depressed, their corresponding con
IOI to I05, in Fig. 1 during a revolution to de?ne
tacts I60, I66 and IE8 are closed.
the digit in the right-hand position of the number 60
As cams IOI to I05 rotate through one revolu
which in this case corresponds to the hundredth
tion they set up twenty-?ve permutations of open
of a unit setting of the measuring instrument and
and closed circuits conditions to de?ne each one
shows also the relative times at which cam I 06
of the twenty-?ve different hundredths of a unit
connects ground through to the second horizontal
settings of the measuring instrument within each
row of cams so that codes de?ning the digits in ‘ quarter of a unit. The twenty-?ve codes which
the higher valued positions in the number may be _ are set up are not all different, however.
For
transmitted as required.
_ each of the ?rst thirteen of the twenty-?ve posi
Fig. 6 is a chart showing the permutation code
tions, thirteen different permutation codes are I
‘signals set up by cams IOI and I0’! to H0 in Fig.
transmitted to de?ne thirteen different hun
1 to de?ne the digit in the second right-hand
dredths of a unit settings of the measuringinstru
position which in this case corresponds to the
ment. Then twelve of these codes are repeated
eighth of a unit setting of the measuring ins-tru
to de?ne the remaining twelve diiierent hun~
ment and shows also the relative times at which
dredths of a unit settings of the measuring in
cam I I I connects ground through to the top hori
strument in each quarter of a unit. Reference
zontal row of cams for transmitting codes de?n 75 to Fig. 5 shows that in repeating the codes, the
'8
:cod'e de?ning the sixth hundredth 20f la'unit set
ting in the ?rst half revolutionof cams l0! :to
1051s :notzrepeated ‘in the second halfvrevolution
of these cams. ‘Cam H16 .is a ground supply
switching vcam "for; the two upperr'ows - of cams.
.'I‘he;peripheries of cams NH ‘and H16 are ar-'
‘ranged :in' two levels. Where the ,.-periphery of
cam :10! is?raised‘contact i5] is closedand where
.itisnormal contact I52 is'closed. Where the
periphery of .cam 406 is ‘raised, contact [BI is .10
closed ‘and where ‘it is normal, contact I51 is
‘open.
FI-‘hegperipheries of cams £02 to vI05 are
carrier-current channels may'rbe impressed iona
isingle metallic ‘circuit or ' on ‘a radio :link ‘inter
.connecting thestations.
’
Before {proceeding with the explanation of :the
detailed operation-of the-circuit it is ,pointedvout
that, in general, in ‘transmitting the code isi-gnals
.-f-rom—any of :thecontacts controlled byvthe ‘cams,
v{or one condition the-electrical circuit intercon
necting the cams and the receiving relays is
grounded at the-measuring station vand for the
other condition the circuit is open. vWhen any
circuit ~isfgrounded the :armatures'oi the corre
sponding .rpolarreceiving relays at the receiving
.arranged :in three levels. The ‘raised. level- closes
station ‘are operated to their respective lower
contacts I53, I55, I51 and I59. At the normal
level of the peripheries of calm I02 to I05 all 15 ,positions. When the transmitting channel is
open the armatures'of these relays areactuated
of the corresponding contactsareopen. Where
upwardly due to the/effect of current in their
‘the peripheries ‘or cams I02 to I05 are depressed
biasing windings. Five-element two-condition
*‘c0ntacts1‘54, |56,i|“58f331ld1$0 are closed.
permutation code signals are transmitted in
“Referto Figs. 5, '6 and ‘.7. TIn'Fig. ‘S'there‘are
“?ve “horizontal “rows "of cross-hatched and ‘blank 620 -every .instance. The rarmatureslof each of the
relaysconnected to channels 180 to I84 .are .set
in .either of their two positions in .response to
circuit conditions ' of _the ‘rightlhand :contacts ‘as
‘rectangles “corresponding "to the "open and closed
thecode signals.
‘sociated with cams l0! .to N5, respectively and
.In response to {the ?ve-element code signals
‘thedeftéhand contact of ‘cam "Hit. In'Fig. '5_ there
.fromthe cam controlled contacts either positive
'are also twenty-‘?ve “vertical columns numbered
or negative battery is impressed through the
‘500 ‘to 524. Each vertical column represents ‘a
armatures of the ?verelays H6 to 120 on the
combination of “open 'and closed ‘contact ‘condi
selecting circuits.
.
itions of contacts 152, 1.54, 1'56, I58 ‘and ‘I60 ‘con
As ‘heretofore mentioned, there ‘are ?ve . sepa
trolled by cams |U|_"b0 105, ‘respectively. ‘Refer
ence ‘to ‘vertical column .500 ‘indicates that ‘?ve 30 rate selecting circuits. vAll ?ve of the ?ve
.e'lemen'tsignals are not impressed on:each of the
of the ‘rectangles‘in‘the vertical .row correspond
selecting circuits. Reference to Figs. .1, f2 and v3
“ing to cams l0! ‘to-‘H35 are blank,'.while the rec
shows that the .armatures of all?ve code receiv
'tang'l'e correspondingto cam ‘I 06 :is cross-hatched.
ing .relays MB to l 20 :are connected only .to the
‘The .blankcondition"of'the'rectangles correspond
’ing ‘to-‘cams L0! to 105 indicates'thatitheir asso 35 ?rst selecting circuit shown in Fig.3.
ciated“rightehand’contacts ‘[52,, 1'54, J56, 158 and
160 "are 'open to ‘form the permutation code for
‘the ‘.90 ‘unit position. In'tliis position cam “10
'While codes de?ningthe hundredths of a unit
are‘being transmitted, all ?ve of the sets-of relay
switches in .the ?rst selecting circuit are set in
vcloses its corresponding ‘contact ‘16! to connect
position. "Theselectionsintheother four select
ground ‘to the 'upper horizontal row of cams.
ing circuits are maintained .due to locking ar
rangementsQin ‘the circuits while the hundredth
codes are Tbeing transmitted into the ?rst select
.‘ing circuit. *When the setting .of the measuring
instrument involves the transmission of codes
associated with ‘cam'lill and ‘I56 associated with " ' requiring a ‘new selectionlby the second selecting
circuit, the second selecting circuitis conditioned
cam I03 areclosedand ‘contacts 154, [58 and 160
to respond. ‘Only four of the '?veelements of
vassociated with 'cams ‘I82, I04 and 106, respec
‘the ?ve-unit code .are impressed .on the four
"tively, 'are open "to ‘form ‘the pennutation code
‘switches .in the second selecting circuit at .suoh
‘for the .0! unit. "Vertical cdlumns Z5021to .524
“Show the codes ‘tor ‘the other "twenty-three posi -50 times. ‘The ‘fifth element of the vcode sets the
‘switch nearest the apex .of the ?rstseleoting cir
tions in ‘each quarter of a .unit set up .during
.“Clllt simultaneously 'to effect a selection by a
a‘ revolution .of'th'e. bottomfhorizontal row of cams.
single switch only ‘in the ?rst selecting circuit
‘In Fig. 6 there are seven'horizontail rows corre
at such time.
spondingito icams 1'0] and it'll‘! .to 1].! and eight
‘When the measured data involves a change
vertical rows numbered 601] to 5&0’? corresponding '
in a‘se‘lection'by the third selecting circuit and .no
'toi‘the ‘eight divisions of the peripheries .of these
change .in the fourth and ?fth .selectingcircuits,
came. ‘The permutation codes ‘for each of the
"the selections last made‘by the ‘fourth and ?fth
"eight unit divisions are ‘indica'ted'in the eight
‘selecting ‘circuits are maintained by loékingar
vertical rows 'of'the top'?velhoriiznntal rows. The
‘rangements ‘in the circuits. iThree signal ele
horizontal row corresponding to cam 1H! indi
'rnents of .the?ve-unit .code are‘impressed on the
cates that .contact ‘l as .is closed .tosupp'ly .ground
third selecting circuit to .set three relay switches
to the tophorizontal row ‘ofcams while‘the code
'This‘is indicatediby the ‘fact that horizontal .row
l‘?sjis'cross-‘hatohed in vertical row '500.
Thecross-ihatched and'b'lank rectangles in .ver
"tical row’SOlin. Fig. "'5 "indicates that contacts I52
corresponding‘ to the . ?rsteighth of .a .unit . divi-
therein. L'I‘he Tfourth signal .element is . impressed
‘on the second selecting circuit vonly and a .?fth
is'being transmitted by them'i'ddle row ofacams. 65 signal .element lis§impressed :on the ?rst selecting
circuit only. "In [the ?rst .and second selecting
‘Fig. '7 shows ‘?ve‘hor'izorital rows one for each
circuits the single signalelement sets one switch
“of-cams 1 IE to H5, inclusive ,andjthirty vertical
.onlyin-each selecting circuitlto make an inde
"rows to de?ne ‘the codes 'foneach of the thirty
pendent selection .in each to de?ne the lower
ifu’ll'unit settings.
'sion, or. more ‘exactly for'the .zone fromJlG .to. .13,
v‘Five conductors L'I‘B? to I84 connect thecode
valued {digits simultaneously.
' alternating ‘current channels whichmay Lbe .?ve
When .two signal elements are employed to
effect a change in the fourth selecting circuit
the ?rs't,.second and thirdrelements-of the .?ve
element .code control the single vswitch nearest
carrier ~current channels may be employed. The
the apex in the . ?rst, second :and third selecting
cams at ‘the measuring station to the ‘polar re~
vceiving relays at ‘the receiving station. It is
pointed out‘that, 'in‘placelo'f the?ve conductors,
2,405,618:
9 '.
circuits to e?ect a selection in each by means of
a single switch alone.
When 'one element only is employed to e?ect
a selection in the ?fth selecting circuit, the ?rst,
‘second, third and fourth signal elements of the
?ve-element code control the single switch near- '
10.
to the bottom terminal of which ground is con
nected, lamp 00 only will be lighted.
This indicates that the measuring instrument
is set at the moment in the .00 hundredths of
a unit position. The particular full unit position
in which the measuring instrument is set is indi
est the apex in each of the ?rst, second, third
cated in the following manner:
'
.
and fourth selecting circuits to effect a selection
With the armatures of the relays in the, third
in each by means of the single switch alone.
selecting circuit in the positions indicated, a cir
The cams, contacts and relay armatures in 10 cuit may be traced from ground through the
Figs. 1, 2,‘ 3 and 4, are shown in the condition
armature of relay 202, contact 221, contact 284
for the transmission and reception of code signals
and conductor 000 to the right-hand terminals of
corresponding to the zero setting of the measur
lamps 400 and 005 designated 0 units and 5 units.
ing instrument. The corresponding cam condi
This results in a selection of one lamp in each
tions are shown in vertical columns 500, 600 and 15 of two groups of ?ve. In order to complete the
700 in Figs. 5, 6 and '7. For this condition a cir
selection, a particular one of these two lamps
cuit may be traced from ground I29 through
must have battery connected to the left-hand
contact IOI, contact I69, contact I ‘I0, contact I5I
terminal. This is performed in the following
and the windings of relays I2I and H6 in series
to battery operating the armatures of relays I2I 20
With the armatures of the relays‘in the fourth
and H6 to their lower positions. The circuits
selecting circuit in ‘the positions indicated, a cir
extending through the windings of relays I25,
cuit may be traced from positive battery through
\ I22 and H1, I21, I23 and H8, I28, I24 and H9,
the armature "of relay 200, contact 23I, contact
I25 and I20 are open. ,Under this condition the
298 and the winding of relay 023 to ground close
armatures of these relays are restored to their
ing the contacts of relay 023. With the arma
upper positions by the effect of current ?owing
‘ tures of the relays in the ?fth selecting circuit
in their biasing windings.
arranged as indicated, a circuit may be traced
manner:
Operation of ?rst selecting circuit
\
'
'
from battery through the armature of relay 200,
contact 230, contact 2I8 and contact 330 to the
When the armature of relay H5 engages con 30 left-hand terminal of lamps 400 to 000. »Since
battery is connected to the left-hand terminal of
tact I 30, a circuit may be traced from negative
only one of the two lamps to the right-hand ter
battery, through contact I30, armature of relay
H6, conductor 308 and the windings of relays
SM and 302 in series to positive battery. For
this condition the armatures of relays 30I and 35
302 will be actuated to their lower positions.
When the armatures of relays II‘! to I20 are
actuated to engage their upper contacts I33, I35,
I 31 and I 39, positive battery is connected through
their respective armatures, conductors 350, 352,
minal of which ground is connected, lamp 0 only
will light.
I
I
There now remains the explanation of the
manner in which lamp 426 corresponding to the
zero tens lamp is selected. This is performed
by the ?fth selecting circuit also.
The path
may be traced from battery through the arma
ture of relay 208, contact 239, contact 2I8, con
tact 429 and the ?lament of lamp 425 to ground,
lighting lamp 026. This is the lamp which indi
cates 0 ‘in the tens position. The cooperation
the armatures of relays 303 to 3“! in the ?rst
selecting circuit will be operated to engage with 45 of the circuits, therefore, has resulted in a selec
tion of lamps corresponding to the setting of the
their upper contacts due to the e?ect of current
measuring
instrument in position 00.00 units.
in their biasing windings. The armatures of all
It
will
now
be assumed ‘that the position of
of the relays in selecting circuits 2 to 5 will be
the measuring instrument has been moved to
locked in the position indicated for reasons which
00.0I units. The permutation code set up on
will become apparent below.
cams IM to I05 is indicated in c0lumn'501 in
a
Under these conditions, a circuit may be traced
Fig.» 5. For this condition, cams IM and I03
from ground through the armature of relay 3!“,
connect ground to conductors I80 and I82. Con
contact 3I‘I, armature of relay 303, contact 3I9,
ductors I8I, I83 and I80 are open. Relays I'2I
armature of relay 300, contact 32I, armatureof
and H6 will operate, The operation of relay H5
relay 302, contact 360 and conductor M0 to con
will in turn operate relays 30I and 302 as here
' ducting ring 400 in lamp bank 050 in Fig. 4. Ring
toiore described. With ground connected to con
050 is connected in parallel to the inner terminals
ductor I82, the armatures of relays I27, I23 and
of lamps 00, I3, 25, 38, 50, 63, ‘I5 and 88. This
I 18 will be actuated to their lower positions. The
results in a selection of eight lamps.
closing of contact I34 will establish a circuit from
The lamps in lamp bank 450 are divided into
negative battery through contact I33, armature
eight groups. Eight lamps, one in each group
of relay IIB, conductor 352 and the windings of
have been selected. It is now necessary to select
relays 304 and 305 in series to positive battery
a particular one of the eight lamps. This is per
actuating the armatures of these relays to their
formed by connecting battery to the outer ter
lower positions. Positive battery will be ‘con
minal of some particular one of the eight groups Y
nected to both ends of the circuits extending
into which the lamps in indicator bank 450 are
through the windings of each of the other relays
divided. With the armatures of the relays in
in the ?rst selecting circuits and their armatures
the second selecting circuit, shown at'the bottom
will be in engagement with their upper contacts.
of Fig. 2, arranged in the positions indicated, a
Attention is called to the vfact that parallel
circuit may be traced from positive battery, 70 branches extend from conductors 350, 352, 353
through the armature of relay 20!, contact 225,
and 354 into other selecting circuits but in each
contact 2H and conductor 400 which connects
instance the path which extends to ground con
to the bank of lamps numbered 00 to I2. As a
nected to the armature of relay‘ I2I is open.‘ In
result of this, since battery is connected to the
the description to followthese parallel paths will
outer terminal of only one of the eight lamps
be traced only when the circuits extending
353 and 354 and the windings of relays 303 to
3| 4 to positive battery. Under this condition,
2,405,618;
12
1.1.
through thenrv are: closed and. the condition. of
the particular‘ selecting circuit is changed in
order‘ to effect a new selection‘.v
A. circuit; may now be traced from ground
through the armature of relay 30I, contact 3I1,
armature of relay 303; contact 3E3, armature of
relay 304, contact 322, armature of relay 306,
contact 325, armature of relay 300, contact 33I
condition indicated for the. .03 selection.v Under
this condition, a circuit may‘ be traced from
ground through the armature of. relay 30I, con
tact 3J1, armature of relay 303. contact 3I9,
armature of relay 304,. contact 322, armature of
relay 306', contact 326, armature of relay 3'I0,
contact. 333 and conductor M4 to ring 464. Ring
404‘ is connected to the inner terminal of lamp
04 and‘ to a corresponding terminal in each of
in: parallel to the inner terminals of lamps 0I, 10 the other‘ seven groups of lamps. Lamp 04: will
and conductor M I to ring 461 . Ring 40! connects
I4, 26: 30!, SI, 64, 16 and. 89. There is. no change
in the condition‘ of the other selecting mecha
'ght, the otherswill remain unlighted.
,
When. the position of the measuring instrument
is changed to indicate. 00.05 units, the armatures
ni'sm, (Battery remains. connected. to the outer
of relays 30I to 308 will all be actuated to their
terminals. of the lampsv invbank 00 to I2. Lamp
15 lower positions. The armatures of relays 309 to
0 I1, therefore, lights;v
314 will be. in their upper positions. For this
When the. position of the measuring instru
condition, a circuit may be traced from ground
ment- changes to. 00.02 units, the code set up on
through the armature. of relay 30I, contact 3I1,
the cams is indicated. by‘ column 502 in Fig; 5.
armature of relay 303; contact 320, armature of
Cams IOI, I03 and I05 close their respective con
relay 305,. contact 324', armature. of relay 308,
tacts I52, I56 and? H30. operating the armatures
contact 330, armature. of relay‘ 31.4, contact MI
, cfijrelays” IZ'I, H6, I21, I23, H8, I25‘ and I20 to
and conductor 415. to ring 465.. Ring 465 con
-.;tlieir lower‘ positions Negative battery is con
nests in parallel to the inner terminal of lamp
nected to the armatures of relays H6, H8. and
05v and to: the inner’ terminal of a corresponding
Relays 30I, 302, 304 and 3105 ‘will be oper
:
. fated-as- heretofore explained'.
The closing of 25 lamp in each of the. other seven groups of lamps
hontact’I-38 will establish a circuit, from negative
atterythrough contact I38, armatureof relay
' ' 5020?, andv the windings of relays 300, 3I0, 31 I, 3I2,
in lamp bank450- Lamp 05 will be lighted since
the other selecting apparatus remains un
changed.
The other lamps will remain un
lighted.
3I-3 and 3M‘ in- series to positive battery op
erating the armatures of these relays to their 30 The permutation code set up on the cams when
the measuring instrumentv is moved into the posi
lower contacts. Other relayv armatures will en
tion for 00.06 units is indicated in vertical col.
gage their upper contacts. Under these circum
stances, a- circuit may be traced from. ground
umn 506.
For this condition, the armatures of
relays 30I to 3I4. are all actuated, to their lower
throughfthe armature of relay 30I, contact 3I1,
armature, of relay 303, contact 3I9, armature of 35 positions. Under thisv condition, a circuit may
relay 11304;v contact 322, armature of relay 306,
contact325,,armature‘ of relay 309, contact 332
and conductor 412 to ring 482'. This will e?ect a
be traced from ground through the armature
of relay 30I, contact 311, armature of relay 3.03,
contact 320, armature of relay 305, contact 324,
armature of relay 308, contact, 330, armature of
selection of lamp’ 02 in bank 450, the other. select
ing apparatus remaining unchanged.
40 relay 3I4, contact 342 and a conductor M6 to
When the measuring instrumentis moved into
position 00.03 units, the code set up on cams IN
to I051will be as indicated in. vertical column. 503
ring 466. Ring ‘466 connects .to lamp 06 and to
a correspondingv lamp in lamp groups 25 to 31,
50 to 62 and 15 to, 81 only.
There is no cor
responding lamp in lamp banks I3 to 24, 38 to
in Fig. 5.. Cams l0'I, I03, I04 and I05 will close
their respective contacts I52, I56‘, I58 and I60. 45 49, 63 to 1-4, and. 08 to 99. Since battery remains
connected to the outer terminal of lamps 00 to
The armatures of relays I2I, II5, I21, I23, H0,
I2, lamp 08 only of lamp bank 450 will light.
I281, I24, H0, I25v and I20‘ will engage their lower
When the measuring instrument is moved into
contacts... Relays. 30I, 3021, 304, 305 and 309 to
the position for 00.07 units, as indicated in ver
3M will remain as. heretofore described. The
tical column 507 in Fig. 5, negative battery will
operation of the armature of relay I19 to close
be connected to conductors 343, 350 and 352 oper
contact I30 establishes. a- circuit from negative
ating the armatures of relays 30I to 305 to their
battery through contact I30 and the windings
lower positions. For this condition, a circuit may
of relays 306, 301 and 308 inv series to positive
be traced‘ from ground through the armature
battery operating the armatures of these relays
to their lower. positions. The armatures of the 55 of relay 30I, contact 3", armature of relay 303,
contact 320, armature of relay 305, contact 324,
other relays will engage their upper contacts.
armature of relay 308, contact 329, armature of
For this condition, a circuit may be traced from
relay 3I3, contact 339 and conductor M1 to ring
ground through the armature of relay 30f, con
1461. Ring 461 connects to the inner terminals
tact 3I1, armature of relay 303, contact 310,
armature of relay 304, contact 322, armature of 60 of lamp 01 and a corresponding lamp in each of
the other seven groups of lamps in lamp bank
relay 308, contact 326, armature of relay 3I0 and
450. Lamp 01 only lights as battery is connected
contact 334' to conductor ‘4I3 which connects to
to the outer terminals of group 00 to I2 only.
ring 463. Ring 463 is connected in parallel to
When the measuring instrument moves to the
the inner terminals of lamp 03 and a correspond—
ing lamp in. each of the other seven groups. 65 position for 00.08 units, negative battery is con
nected to conductors 348, 350, 352 and 354. The
However, since the condition of the other select
armatures of relays 30I to 305 and 309 to 3I4
ing apparatus remains unchanged, battery will
will be operated to their lower position. A cir
remain connected to the outer terminal of the
cuit may then be traced from ground through
lamps in the ?rst bank only so that lamp 03 alone
70 the armature of relay 30I, contact 3I1, armature
will light in indicator bank 450.
of relay 303, contact 320, armature of relay 305,
Changing the measuring instrument to posi
contact 324, armature of relay 308, contact 320,
tion 00.04 units, as indicated in vertical column
armature of relay 3 I3, contact 340 and conductor
504 in Fig. 5, will operate the armature of relays
M8 to ring 468. Ring 468 connects to the inner
303 to 3 I 4 to their upper contacts while the other
relays in the first selecting circuit remain in. the 75 terminal of lamp 08 in group 00 to I2 and to
13
2,405,618
14
the inner terminal of a corresponding lamp in
ductors I80 to I84 respectively, are extended,
each of the other seven groups. Lamp 08 lights,
through contacts I5I, I53, I55, I51 and I59 re
the others remain unlighted.
spectively. Since contact I6I will be closed,
When the measuring instrument is moved into
ground I29 will be connected through contact
position for 00.09 units, negative battery is con 5 I6I toconductor I95. During the interval while
nected to conductors 348, 350 and 354. Con
the cams IN to I06 were moving through thir
ductors 352 and 353 are connected to positive
teen-twenty-?fths of a revolution, cams I01 to
battery. Under this condition the armatures of
' III will have each rotated into the next code
relays 30I, v302, 303 and 309 to 3M are operated
position. The movement of the cams'of the
to their lower positions. A circuit may then be 10 middle row sets up a cam and contact pattern in
' traced from ground, through the armature of
relay 30I, contact 3I1, armature of relay 303,
contact 320, armature of relay 305, contact 323,
armature of relay 301, contact 321," armature of
relay3I I, contact 336 and conductor M9 to ring 15
469. Ring 469 is connected to the inner terminal
of lamp 09 in group 00 to I2 and to the inner
terminal of a corresponding lamp in each of the
other seven lamp groups. Lamp 09 will light'and
accordance with vertical row 601 in Fig. 6.. Con
tacts I62 and I64 are closed. Contacts I65, I66,
I61 and I68 and I69 are all open. The opening of
contact I69 disconnects the ground supply to the
top row of cams; A circuit may be traced from
ground I29~through contact I6I and conductor
I95 to parallel branches. One branch extends
through contact I64, I55, conductor I82and the
windings of relays I21, I23 and I18 in series to
the other lamps will remain unlighted.
20 battery. Another branch extends through con—
When the measuring instrument is moved into
tacts I62, I53, conductor I8I and the windings of
the position for 00.10 units, negative battery is
relays I26, I22 and H1 in series to battery. JI‘he
connected to conductors 348, 353, 3-53 and 354.
armatures of these relays will be actuated’ to
The armatures of relays 3!“, 302, 303 and 306 to
their lower positions. The armatures of all other
3I4 will be operated to their lower positions. 25 relays in Fig. 1 will be operated to their upper
Under this condition, a circuit may be traced
positions due to the e?ect of current in their
from ground through the armature of relay ‘30I,
biasing windings.
‘
.’
contact 3I'I, armature of relay 303, contact 320,
It is pointed out that relays II1 to I20 trans
armature of relay 305, contact 323, armature of
mit polar signals to control the armature of the
relay 301, contact 328, armature of relay 3I2,
polar relays in the second, third, fourth and ?fth
contact 338 and conductor 420 to ring 410. Ring
selecting circuits. The polar signals are im
4.10 connects to the inner terminal of lamp I0
pressed on the left-hand windings of relays in
in lamp group 00 to I2 and to an inner terminal
these circuits simultaneously. A single return
of a corresponding lamp in each of the other
path to ground connected to the armature of
seven lamp groups. Lamp I0 will light and the 35 relay I2I is provided for each selecting circuit.
other lamps will remain unlighted.
The return path for the different selecting cir
When the measuring instrument is moved into
cuits extends through the armature of relays I2I
the position for 00.11 units, negative battery is
to I25. This path is open due to the positions I
connected to conductors 348, 350 and 353. Con
of the relay armatures except when the particu
ductors 352 and 354 are connected to positive 40 lar selecting circuit is intended to respond. After
battery. Under this condition, the armatures
selecting paths are established through the sec
of relays 30I, 362, 303, 305, 301 and 303 are
ond, third, fourth and ?fth selecting circuits,
operated to their lower positions. A circuit may
they are locked locally through the armature and
then be traced from ground through the arma
contact of each relay in the chain in each select
ture of relay 30I, contact 3I1, armature of relay
ing path. The selecting paths through each of
303, contact 329, armature of relay 305, contact
323, armature of relay 301, contact 328, armature
selecting circuits 2 to 5 are maintained, once
they are established, by their respective local
locking circuits until the path to ground on ‘the
armature of relay I2! is provided at the proper
of relay 3I2, contact 331 and conductor 42I
which connects to ring 41L Ring 41! is con
nected to the inner terminal of lamp II in lamp 50 time. ‘ Then the relays in the selecting circuits
group 00 to E2 and to the inner terminal of a
for which ground has been provided respond to
corresponding lamp in each of the other seven
the polar signals of the changed code to set up
lamp groups. Lamp II only lights.
new selections.
v
s
'
When the measuring instrument is moved into
When the armature of relay II 1'operates to
the position for 0012 units, negative battery is
engage contact I32, a circuit may be traced from
connected to conductors 348 and 350, and positive
negative battery through the armature of relay
battery is connected to conductors 352, 353 and
II1 to parallel branches; The only effective
354. The armatures of relays 30I, 302 and 303
will operate to their lower positions. A_ circuit
branch for. this condition extends through the
left-hand winding of relay 20!, conductor 355,
contact I41, armature of relay I22 and contact
may then be traced from ground through the ill)
armature of relay 30L contact 3H, armature of
I40, which is now closed, through the armature
relay 303, contact 320, armature of relay 395,
of relay I2I to ground. The armature of relay
contact 323, armature of relay 301, contact 321,
20I is operated to its lower position to engage '
armature of relay 3i I, contact 335 and conductor
contact 226.
‘I
422 which connects to ring 412. Ring 412 con
The operation of the armature of relay H8 to
nects to the inner terminal of lamp I2 in lamp
group 09 to I2 and to the inner terminal of a
corresponding lamp in each of the other seven
groups of lamps. Lamp I2 only lights.
Operation of second selecting circuit
When the measuring instrument moves into
the position for 00.13 units, cams IM to I06 will
each actuate its corresponding follower to close
its left-hand contact. Under this condition, con
engage contact I34 establishes a circuit which
may be traced from negative battery through
contact I34, armature of relay -' I 53 and con
ductor 352 to parallel branches. The only ef
fective branch for this condition extends through
the left-hand winding of relay 203 over a circuit
which has been traced through conductor 355 to
ground connected to the armature of relay I2I.
The armature of relay 203 is operated to its lower
position closing contact 230.
'
'
2,405,618
15
16
,
tor 40! to the outer terminals of lamp group I3
The armature of relay H9 engages contact I31.
to 24.
A circuit may be‘ traced from positive battery
Attention is called to the fact that every time
through contact I31, armature of relay H0 and
a selection is made in the second, third, fourth
conductor 353 to parallel branches. The branch
through the second selecting circuit which is the Ci or fifth selecting circuits, the armature of each
relay in the selecting chain is locked in position
only effective branch for this condition extends
to maintain the selection.
in series through the left-hand windings of re
Certain of the locking paths will be traced by
lays ‘206 and 201 to the common ground by way'
way of example. In the case of the selecting
of conductor 355. Positive battery operates the
armatures of relays 206 and 207 to their upper 10 path which supplied battery to the outer terminal
of lamps 00 to I2 in lamp bank 450, the circuit
positions.
extended through the armature of relay 20I and
The armature of relay I20 engages its upper
contact 225 only in the second selecting circuit.
contact. A circuit may be traced from positive
‘The armature of relay 20| was locked in this
battery through contact I39 and the armature of
position by the circuit extending from positive
relay I20 to parallel branches. The only effective
battery through contact 225 and the middle wind_
branch extends through the winding of relays
ing of relay 201 to ground. For the second selec
2I2 to H5 in series and through conductor 355
tion of lamp groups I3 to 24 in lamp bank '150,
to the common ground connected to the arma
the circuits for locking the armatures of relays
ture of relay I2 I. Positive battery operates the
armatures of relays 2 I2 to 2I5 to their respective 20 HM and 203 in their lower positions and the arr
matures of relays 201 and 2M in their upper
upper contacts.
positions extends from battery connected to the
' Attention is called to the fact that whereas
armature of relay 20! along the chain, through
negative battery has heretofore been connected
the armature and contact of each relay involved
at all times to conductor 34B maintaining the
in the selection through a locking winding on
armatures of. relays 3M and 302 in their lower
each relay to ground.
'
positions to supply ground through the various
The selecting path for the I3 to 24 group of
other relays in the ?rst selecting circuit, the
lamps in lamp bank 450 may be traced from bate
armatures of relays 30l and 302 are now oper
tery through the armature of relay 2!“, contact
ated to their upper positions. Under this cone
226, armature of relay 203, contact 230, armature
dition a circuit may be traced from ground
through the armature of relay 30L contact (H8
and conductor M0 to ring 460. Ring 460 as has
been explained connects to the inner terminal of
the lowest numbered lamp in each of the eight
lamp groups in lamp bank 450.
Whenever conductors I80 to I84 are cut
of relay 201, contact 231, armature of relay 2“,
contact 25L contact 269 and conductor 40I to
lamp group IE to 20. Lamp I3 is lighted since
the ?rst selecting circuit, as has been shown,
simultaneously selects the ?rst lamp in each
group.
Lamp 420 corresponding to 0 in the tens group
and lamp 440 corresponding to 0 in the units
lection of the lowest numbered lamp in'each of
group remain unaffected as the third, fourth and
the eight lamp groups of lamp bank 050 is of! 40 ?fth selecting circuits have not been altered. The
fected by the operation of the armature of relay
lighted lamps correspond to a setting of 00.13
301 to engage contact 3l8 so that ground is con
units.
nected to conductor M0 and to ring 460 directly
When the position of the measuring instru
without passing through the armatures and con
ment is changed to the 00.14 setting cams I 0| to
tacts of any other relays in the ?rst selecting
I 00 are rotated into their next succeeding posi
circuit. From this it should be apparent that
tion. In this position conductors I80 to I84 are
whether or not the settings of the relays other
no longer cut through to the higher valued cams
than relay 30| are changed at such times, the
and cams I01 to H0 no longer control the set
changes do not establish any selections and they
tings of the relays in the second selecting circuit.
are ineffective as the selection is e?ected in each 50 This explains why the relays in the second select
case solely by the operation of the armature of
ing circuit have been looked as their settings
relay 30I to its upper position. It is emphasized,
must be maintained during the interval while the
measuring instrument is in the region between
and reference to the top horizontal lines in Figs.
6. and '7 shows, that except in the selection for
_.13 and .24 units.
00.00 the armature of relay 3%“ is always actue
Attention is called to the fact that the relays
ated to its upper position when the transmitting
in the ?rst selecting circuit are not locked. Dur
channels are connected to the middle and top
ing the interval while conductors I80 to I84 were
cut through to the higher valued cams, the ?rst
row of cams. The lowest numbered lamp in each
selecting circuit is arranged so that it selects the
of the eight groups is selected by the ?rst select
inner terminal of the lowest numbered lamp in
ing circuit when the middle row of cams is in
control and the 00 lamp is always selected by
each group. Therefore, while conductors I80 to
I84 are cut through to the next higher valued
the ?rst selecting circuit in cooperation with the
cams, two selections are being made rather than
second selecting circuit when the top row of
one and this is accomplished by effecting a selec
cams is in control. The reason for this will be!
tion by the ?rst selecting circuit by means of one
come more apparent from the description here
signal element alone. The various codes assigned
inafter.
Formerly battery was supplied through the ar
have been arranged so that, whenever conductors
I80 to I84 are cut through to the higher valued
mature of relay 20I to lamp group 00 to I2 to
cams, except for the condition for 00.00 units,
light lamp 00. The selection made by the second
relay SM is always released.
selecting circuit has now for the ?rst time been
It will be assumed that the position of the
changed. The new selection may be traced from
measuring instrument continues to change as the
battery through the armature of relay 20l, con
measured quantity is increased. As the quantity
tact 220, armature of relay 203, contact 230, ar
through to any of the higher valued came a se
mature of relay 20?, contact 231, armature of
relay 2M, contact 2!“, contact 26.9 and conduc
is increased in the range from 00.13 units to 00.24
units each of the one-hundredth unit codes used
17
2,405,618
7
for the setting from .01 unit to .12 unit will be
repeated except the code for .06 unit. This may
be seen from a comparison of vertical columns
501 to 512 in Fig. 5 with vertical columns 514
524. Eachof these transmitted codes results
the connection of ground to the inner terminal
a di?erent one of lamps I3 to 24, inclusive,
to
in
of
in
lamp bank 450. .
18
connected from the second selecting circuit to
lamp group 38 to 49 in lamp bank 450.
When the position of the measuring instrument
has been changed to correspond to a setting of
00.50 degrees, the relay settings of the second
selecting circuit will be changed to correspond to
the code indicated in vertical column 604 of
Fig. 6.
'
.
When the measuring instrument is in the posi
Reference to vertical column 604 in Fig. 6 in
tion for 00.25 units, conductors I80 to I84 will .10 dicates that cams I01, I08 and I09 close their
‘ again be cut through to the middle group of cams.
right-hand contacts operating the armature of
Reference to column 602 in Fig. 6 indicates that
the corresponding. relays to engage their lower
for this condition, cams I 01, I08 and “0 close
contacts. The selections'by the second selecting
contacts I62, I64 and I68, respectively. Contact
circuit involve the operation of the armatures of
I66 associated with cam I09 is open. The arma
relays 20I, 203, 206 and 201 to their lower posi
tures of relays I I1, H8 and I20 are operated to
tions and the operation of the armature of relays
engage their lower contacts. The armature of
212 to 2I5 to their upper positions. Under this
relay I I9 is operated to engage its upper contact.
condition, a circuit may be traced from battery
.Negative battery is connected to conductors 350,
through‘the armature of relay 20I, contact 226,
352 and 354. Positive battery is connected to 20 armature of relay 203, contact 230, armature of
conductor 353. It is pointed out that the e?ect
relay 201, contact 238, armature of relay 2 I 5, con
of positive or negative current in the left-hand or
tact 253, contact 212 and conductor 404 which
operating windings of the. relays in selecting cir
connects to the outer terminals of lamps 50 to 62.
cuits 2 to 5 is dominant over the effect of the
Lamps in the 50 to 62 group will therefore be
holding current in these relays. The armatures 25 lighted as the measuring instrument operates in
of relays 20I, 203 and 2I2 to 2I5 are operated to
this zone.
their lower positions. The armatures of .relays
When the measuring instrument moves to a
206 and 201 are operated to their upper positions.
position corresponding to 00.63 units, reference to
The selecting circuit for lamp group 25 to 31
in lamp bank 450 may now be traced from bat
vertical column 605 in Fig. 6 discloses that cams
terythrough the armature of relay 20I, contact
226, armature of relay 203, contact 230, armature
of relay 201, contact 231, armature of relay 2I4,
contact 252, contact 264 and conductor 402 to
the outer terminals of lamps 25 to 31.
As the measured vquantity continues to increase
cams I8I, I06 will continue to rotate. When the
measuring instrument is in a setting correspond
ing-to 00.26 units, conductors I80 to I84 will be
disconnected from their respective cams in the
middle row. While the second selecting circuit
remains in the condition of supplying battery over
conductor 402 to the outer terminal of lamps 25
to 31 of lamp bank 450, cams IN to I65 will
resume control. Permutation code signals will be
transmitted to effect the selection of lamps 26 to
31 in lamp bank 450 in the same manner as de
scribed for the corresponding lamps in lamp group
I01 and I09 close their right-hand contacts actu
ating the armature of the corresponding relays.
' in Fig. 1 to engage their lower contacts.
The
armatures of relays 20I, 206 and 201 in the second
selecting circuit will be actuated to engage their
respective lower contacts. The armatures of all
other relays will engage their upper contacts.
_ For this condition, a. circuit may be traced from
positive battery through the armature of relay
20I, contact 226, armature of relay 203, contact
229, armature of relay 206, contact 236, armature
of relay 2I3, contact 249, contact 211 and con
ductor 405 to the outer terminals of the lamps
63 to 14. This selection will be maintained while
the measuring'instrument measures quantities in
the range 00.63 to 00.74 units. Meanwhile ground
will be connected from the ?rst selecting circuit
to the inner terminals of the lamps in lamp group
63 to 14 in the manner described.
00 to I2. Then once more raised surfaces on the
Reference to vertical column 606 in Fig. 6, in
peripheries of cams IOI to I06, will make the 50 dicates that for this condition, cams I01, I09 and
middle row of cams e?ective for the next selec
H0 will close their associated right-hand con
tion. Reference to vertical column 603 in Fig. 6
tacts operating the armatures of the correspond
shows that for this condition cams I01 to' H0
ing relays in Fig. 1 to their lower positions. The
close their respective right-hand contacts and
armatures of relays 20I, 206,201, 2I2, 2I3, 2M and
operate their respective relays in Fig. 1. Nega- ' 2I5 will be actuated in turn to their lower posi
tive battery is therefore connected to conductors
tions, while the armature of relay 203 is actuated
350, 352, 353 and 354. The armatures of relays
to its upper position. For this condition, a cir
20I, 203, 206, 201 and 2I2 to 2I5 will be actuated
cuit may be traced from positive battery through
to engage their lower contacts. The selecting
the armature of relay 20I, contact 226, armature
circuit extends from battery through the arma 60 of relay 203, contact 229, armature of relay 206,
ture of relay 201, contact 226, armature of relay
contact 236, armature of relay 2I3, contactl250,
203, contact 230, armature of relay 201, contact
contact 214 and conductor 406 to the outer ter
238, armature of relay 2I5, contact 254, contact
minals of lamps 15 to 81. During the interval
262 and conductor 403 to the outer terminals of
While the measuring instrument is changing
lamps 38 to 49. The armature of relay 30I is
through the region 00.75 units to 00.87 units,
simultaneously operated to its upper position to
ground will be connected by the ?rst selecting
engage contact 3I8 which will again effect the
circuit to the inner terminals of these lamps to
selection of ring 460 in a manner heretofore de
light lamps corresponding to the setting of the
scribed so that lamp 38 of lamp group 38 to 49
instrument.
will be lighted.
When the measuring instrument is moved to
70
When the position of the measuring instrument
position 00.88 units, reference to vertical column
is moved to 00.39 units, cams IOI to I05 again
607 in Fig. 6 indicates that cams I01 and H0 close
resume control. The inner terminals of lamps 39
their respective right-hand contacts operating the
to 49 will be selected in a manner corresponding
armatures of the corresponding relays in Fig. 1
:to that heretofore described while battery remains
.to their lower positions. The armatures of relays
l9
20
7
20!, and 2I2‘to .2I5will be actuated invturn to
their lower positions. The armatures of :relays
203, 206 and 20'! will be actuated to theirupper
positions. ‘Under this condition, a circuit may
be traced from positive battery through the arma
tureof relay 20!, contact .225, armature of relay
.203, contact 229,. armature of relay 200, contact
235, armature of relay 2I2, contact 248, contact
219 and conductor 401 to. the outer terminals of
lamps 28 to 99 inlampbank ‘450. While this
selection is maintainedv by the locking circuit,
ground will be connected; to the inner terminals
of lamps 88 to 99 to light ‘lamps corresponding to
the instrument setting.
_
1'. Up to the present it hast been assumed that
the measuring. instrument has been changing
through the region from 00.00 units to 00.99 units.
The settings of the armatur'es in the third, fourth
and ?fth selecting circuitshave been maintained
unchanged during this interval. Lamps 426 and
440 have been lighted during this interval to com
plete the indication. - The position of the ‘measur
ing instrument is ‘now to be changed so that it
‘moves into the 01.00 unit zone. Itv is necessary,
therefore, to extinguish lamp 4'40 and light lamp
to ‘the middle row of cams. And whenever the
transmission. ‘conductors I80 to I84 are cut
through to the top row of cams,‘ not only is the
armature of relay 30! in its upper'positionso'as
to supply ground to the inner terminal of the ?rst
lamp in each one of the eight lamp groups in
lampba'nk 4.50, but the armature of relay 20I is
also on each such occasion operated to vengage its
upper contact 225 so as to connect battery to the
outer terminals of lamps00 to 12. As a result of
this, the .00 lamp in lamp bank ‘450 is always
selected whenever transmission conductors I80 to
I50 are cut through the two lower valued groups
of cams to the top row of cams which control the
transmission of codes for full units. From this
it ‘should be apparent that. now three selections
are made when a full unit selection is ‘made.
Before proceeding to‘ describe the ‘manner in
which lamp MI corresponding to full unit I is
selected, the manner in which the relays which
are locked in position for each selection in the
second selecting.v circuit are unlocked will ?rst be
explained. It was heretofore explained that as
the varmatures of the various relays in the second
25 selecting circuit involved in making any particu
MI to indicate this change. i The manner in
lar. selection were operated to one or the other
which this is effected will ‘now be explained.
of their respective contacts, they were locked in
that position, while the measuring instrument re
mained in the corresponding zone. Each of the
relays in the second selecting circuit responds to
polar signals transmitted from relays II'I to I20.
The path in each instance extends from positive
‘operation of third, fourth‘ and ?fth selecting
' ' Each time that the measuring instrument is in
position such that the two right-hand digits of
the measured quantity correspond to zero, the
position of cams IOI to I06 and I07 to III will be
such that ‘conductors I81. to I04 are further ex
tended to the top row of cams to transmit the
codes for the higher Valued digits as well as for
zero in the two right-hand positions of the ‘num
ber simultaneously.
.
.
or negative battery connected to the armatures of
relays H‘! to I20 through the left-hand windings
of the relays in the second selecting circuit,
through common conductor 355 to .ground con
nected to the armature of relay I2I. The e?ect
of current ?owing in this path, whether it be from
positive or negative battery, preponderates over
I A, circuitmay be traced from ground I29
the effect of the locking current so that the re
.through contact .IIiI and contact I60, to contacts
I10;to I13 in parallel. Reference to column ‘701
of Fig. 7 indicates that ‘for the 01.00 full unit set
ting, the contactshassociated with cam H3 and
IIII are closed-and that contacts I'IOand I13 asso
ciated with cams II2, and-H5, respectively, are
lays respond to the ‘polar signals for each new
selection.
open.
The, circuit; therefore, extends through
contact Ill, contact I03, contact I55 and the
windings ofprelays 121,123 and H8 to positive
battery,‘ operating thearmatures of relays I21,
I23 and II8 to their lower positions. .A parallel
When the transmitting conductors are con- ,
nected through to the top row or full unit earns,
the armatures of relays I22. and II‘! are always
actuated so as to engage their respective upper
contacts due to the effect of current in their bias
ing windings. Under this condition, a‘ circuit may
be traced from ‘positive battery, through contact
I 33, armature of relay I ll’, conductor 350, left
hand winding of relay 20I, and conductor 355.
circuit extendsthrough contact I'I-2, contact I65,
contact I51 and the windings of relays I28, I24
and II 9 in series to positive battery, operating the
armatures of relays I28, I24. and H9 to their
Since the armature of relay I22 no longer engages
contact MI, an alternative path has been estab
will engage their upper contacts, at ‘such times
and will always make a selection of the 00.00 lamp
in lamp bank 450. In other words, except in the
case of the 00.00 unit selection, the armatures of
relays 30I and 302 are always operated to their
upper positions whenever the transmission con
a result of this, the armature of relay 20I ‘will al
ways be actuated to engage and lock with its up
per contact 225 for everyone of ‘the full unit selec
tions which is not a multiple of ?ve over the path
which has been traced to ground connected to
lished through contact I40, armature of relay
I26, and contact I 43, the armature of relay I23
being operated to its lower position, through the
lower‘ positions. The armatures of relays I25 and
armature of relay I23,‘ contact I42, armature of
I20 will be in their upper positions.
‘ .
relay I22, contact I40 and the armature of relay
‘ Attention is called to the two top horizontal
I2I to ground. Reference to the middle hori
lines in Fig. ‘iv-which indicate that except for the
00.00 unit selection, both cams H2 and I0‘! main 60 zontal line in Fig. 7 discloses that except for the
0, 5, l0, 15, 20 and 25 unit settings of the measur
tain their associated contacts open at all times
ing instrument, cam II3 is in condition so that
while the toprow of cams is functioning to trans
contact Il'I is always closed for each of the full
mit codes de?ning the higher valued digits. Re
unit selections. Contacts I63 and I55 are also
lays IIS and Ill therefore will always transmit
always closed so that the armatur'es of relays I21,
vpositive battery to the ?rst and second selecting
I23 and IE8 are always in their lower positions
circuits at such times so that the armatures of
for every full unit selection except in the selec
relays 30I and 302 in the ?rst selecting circuit
tions of full units which are multiples of ?ve. As
and of relay 20I in the ‘second selecting circuit
ductors, connecting the stations are cut through
the armature of relay I2I through contact I48.
For the full unit selections which are multiples
2,405,618
521
of ?ve, the armature of relay 20I will also be
actuated to engage its upper contact in a manner
to be understood from the following, so that when '
""22
.
range from 01.01 to 01.99‘um'ts. The ?rst and
second selecting circuits will cooperate "to select
each one ofv the lamps from .0I to .99 in lamp
the measuring instrument is moved into any full
bank 450 as‘ themeasuring instrument sweeps
unit position, the armature of relay 20I will al
through the positions from 0I.0I to 0I.99 units.
ways be actuated to engage its contact 225 and
,Thereupon the transmitting conductors will be ,
make a selection, as has been shown, of the outer
again out through to the full unit cams. On this
terminals of lamps .00 to .12 in lamp bank 450.
occasion, as may be seen from reference to verti-‘
At the same time, the ?rst selecting circuit ‘co
cal column 702 in Fig. 7, cams H3, H4 and. H5
10 close contacts I1I, I12 and I13 respectively. The '
operates to select lamp .00.
Reference to vertical column 701 in Fig. 7 dis
armatures of relays. I21, I23, H8, I28, I24, H9,
closes that in selecting the lamp corresponding
I25 and I 20 will all be actuated to their lower
to one full unit, cams H3 and H4 close their
positions. The armatures of relays 202 and 205
respective contacts. The armatures of relays H8
will again be actuated to their lower positions.
.and II 9 are actuated to their lower positions.
The closing of contact I38 establishes a circuit
The armature of relay I20 is actuated to its
from negative battery through contact I38, arma
upper position. In the case of relay I I8, a cir
ture of relay I20, conductor 354, left-hand wind
cuit is established from negative battery through
ings of relays 2 I0 and 2I I to conductor 356 which‘
contact I34, armature of relay H8, left-hand
extends to ground connected to the armature of
winding of relay 202, conductor 356, contact I43,
relay I2I. The armatures of relays 2I0 and 2H
armature of relay I23, contact I42, armature of
will be operated to their lower postions. A cir
relay I22, contact I40 and armature of relay I2I
cuit may then be traced from ground through
to ground, operating the armature of relay 202
the armature of relay 202, contact 228, armature
to'its lower position. With the armature of relay
of relay 205, contact 234, armature of relay 2I I,
I I9 operated to engage its lower contact, a circuit
contact 245,‘ contact 200 and conductor 482 to
may be traced from negative battery, through
the right-handrterminals of lamps 442 and 441
contact I30, armature of relay I I9, conductor 353,
corresponding to full units 1 and 2. The con
left-hand winding of relay 205 to conductor 356
dition-of the fourth and ?fth. selecting circuits
which extends as has been shown to ground con
remains unchanged as they cannot respond to the
nected to the armature of relay I2I. Since the
polar signals transmitted by relays H9 and I20
armature of relay I20 engages its upper contact
since the path to ground connected to the arma
I39, a circuit may be traced fom positive battery,
ture of relay I2I is open in each instance. Bat-v
through contact I39, armature of relay I20, con
tery will, therefore, remain connected tothe left
ductor 354 and the left-hand windings of relays
hand terminal of lamps 440 to 444 corresponding
2I0 and 2H in series to conductor 356 which . to full units 0 to 4 and lamp 2 will light.
extends to ground connected to the armature of
When the transmitting conductors are again
relay I2I. Th'e armatures of relays 2I0 and 2I I
out Ithrough to the full unit cams, when the
are actuated to engage their upper contacts. A
measuring instrument is in the position corre
circuit may now be traced from ground through
sponding to 03.00 units, as indicated in column
the armature of relay 202, contact 228, arma
703 of Fig. 7, the armatures in Fig. 1 controlled
ture of relay 205, contact 234, armature of relay
by cams H3 and H5 will be in their lower posi
2I I, contact 245, contact 282 and conductor 48I
tions. The armatures of other relays in Fig. 1
to the right-hand terminals of lamps MI and
will be in their upper positions. For this con
446 corresponding tov full unit indications of I
dition, the armature of relays 202, 2I0 and 2H
45 will be operated to their lower positions and the
The relays in the fourth and ?fth selecting cir
armature of relay 205 will be operated to itsup
cuits have assumed the positions shown as a
per position. A circuit may then be traced from
result of operation in a previous cycle of opera
ground to the armature of relay 202, contact 228,
tion which‘ may be understood from the descrip
armature of relay 205, contact 233, armature of
tion hereinafter. A circuit may be traced from
relay 2| 0, contact 244, contact 289 and conduc
battery through the armature of relay 204, con
tor 483 to the right-hand terminals of lamps 433
tact 23I, contact 298 and the winding of relay
and 448 corresponding to full units 3 and 8. Bat
423 in Fig. 4 to ground, so that the contacts as
tery will be connected to the right-hand termi
sociated with relay 423 are all closed at this time.
nal of lamp 443 and lamp 443 corresponding to
,
The armatures of relays 423 will remain in the 55 full unit 3 will light.
operated positions as the winding of relay 423 is
When the measuring instrument has moved
maintained energized while the selecting path‘
into position corresponding to 04.00 units as in
through the fourth selecting circuit is maintained
dicated in vertical column 104 in Fig. 7, contact
by its locking circuit. A circuit may also be ‘
I1I associated with cam H3 will close to operate
traced from battery through the armature of 60 the armatures of relays I21, I23 and H8 to their
relay 208, contact 239, contact 2I8 and contact
respective lower positions. The armatures of all
430 to the left-hand terminal of units lamps 440
other relays in Fig. 1 Will be in their upper posi
to 444. Lamp 44I which corresponds to full unit
tion. For this condition, the armature of relay
I will light. A circuit may also be traced from
202 is actuated to its lower position. The arma
positive battery through‘ the armature of relay 65 tures of other relays in the third selecting circuit
208, contact 239, contact 218, contact 429 and the
will be actuated to their upper positions. A cir
?lament of lamp 425 to ground so that the zero
cuit may be traced from ground through the ar
and 6.
.
,
tens lamp is lighted. The lighted lamps 423, MI
mature of relay 202, contact 228, armature of
and .00 indicate a setting of the measuring in-_
relay 205, contact 233, armature of relay 2I0,
strument corresponding to 01.00 units.
70 contact‘243, contact 29I and conductor 484 to
When the measuring instrument is moved into
the right-hand terminals of lamps 444 and 449
the position corresponding to the setting for 01.01
corresponding to full units 4 and 9. Since bat
units, cams IOI to I05 will resume control and
tery remains connected to the left-hand termi
the cycle of operations may be repeated while
nal of lamps 0 to 4, lamp 4 will light.
the measuring instrument moves through the .75 , For the 05.00 degrees position of the measuring
2,405,618
23
24
instrument, as indicated in vertical column 705
in Fig. 7,Ycams H4 and H5 close contacts I12
and [13. The armatures of relays I28, I24, II9,
Each one of the corresponding selections by se
lecting circuit 3 has been shown to select units
lamps I and 6, 2 and 1, 3 and 8, and 4 and 9 in
pairs. With battery from the ?fth selecting cir
I25 and I20 will be actuated to'their lower posi- V
tion's. The armatures of all other relays in Fig. Cl cuit now remaining connected to the left-hand
l will'be in their upper positions.
terminals of units lamps 5 to 9 in parallel, units
Attention is particularly called to the fact that
lamps 6 to 9 will be selected in response to the
in this position of the measuring instrument, as
codes shown in vertical columns 706 to 709 in
Fig. 7.
.
in'each full unit position which is a multiple of
The code for the setting of the measuring in
?ve, the armatures' of relays I21, I23 and H8 1O
are in their upper positions. For this condition
strument at ten full units is shown in ‘vertical
the armature of relay 202 will be actuated to its
column 1 I 0,
upper position.‘ The circuit may be traced from
Once again for reasons explained the armatures
positive battery through contact I35, armature
of relays H6 to H8 are all in their upper posi
of relay H8, conductor 352, left-hand winding of 15 tions. The fourth selecting circuit is free to re~
relay 202, conductor 356, contact I49, armature
s'pond. Cam I I4 alone closes its contact. The
of relay I21, contact I45, armature of relay I 24,
armature of relay 204 in the fourth selecting cir~
contact I44, armature of relay I23, contact I42,
cuit is again operated to its lower position. The
armature of relay I22, contact I40 and the arma
armatures of other relays in the fourth selecting
tureofrelay I2I to ground. A circuit may then 20 circuit remain in their upper positions.
be traced from ground through the armature of
A circuit may now be traced from battery
relay 202, contact 221, contact 284, and conductor
through the armature of relay 204, contact 232,
480-to the right-hand terminals of-lamps 440 and
armature of relay 209, contact 24I, contact 294,
445 corresponding to full units 0 and 5. The
and the winding of relay 425 to ground, closing
operation of the armature of relay I I9 to its lower 25 the contacts of relay 425.
position establishes a circuit from negative bat
The ?fth selecting circuit remains unchanged.
tery through contact I36, armature of relay H9,
A circuit may therefore be traced from battery
conductor. 353, left-hand winding of relay 204,
through the armature of relay 208, contact 239
conductor 351, contact I45, armature of relay I24,
and contact 2 I8 to parallel branches. One branch
contact I44, armature of relay I23, contact I42, 30 extends through contact 436 and the ?lament of
armature of relay I22, contact I40 and the arma
lamp 421' to ground lighting lamp 421, which is
ture of relay I2I to ground, operating the arma
the lamp corresponding to settings in the range
ture of relay 204 to its lower position. The clos
from 10.00 units to 19.99 units. The other par
mg ‘of contact I30 establishes a circuit from nega
allel branch extends through contact 431 to the
tive battery through contact i38, armature of re 35 left-hand terminal of lamps 440 to 444 which are
lay I20. conductor 354, left-hand winding of relay
full units lamps 0 to 4. Simultaneously the right
209 and conductor 351 which extends to ground
connected to the armature of relay 12L The
armature of relay 209 is operated to its lower
position. A circuit may then be traced from posi
hand terminals of lamp 0 will be selected’by the
third selecting circuit while the ?rst and second
cooperate to select the .00 lamp in lamp bank
tive ‘battery through the armature of relay v‘204,
contact 232, armature of relay 209, contact 242,
contact 292, and the Winding of relay 424 to
ground‘, operating relay 424, A circuit may now
When the position of the measuring instru
Lamp 445’correspondihg-to full unit 5 will, there- '
signals from the cams in a manner which should
fore, light, Relay 424 is maintained operated due
to the locking'of the armatures of relays 204 and
be understood from the foregoing to control their
respective full units lamps and the lamps in lamp
209 in their lower positions
bank 450.
450.
~
ment advances the fourth and ?fth selecting cir
cuits remain locked to maintain the selection of
lamp 421 until, as indicated from reference to
. ‘be traced from‘positive battery through the arma 45 vertical column 715 in Fig. 7, the instrument
ture of relay 203, contact 239, contact Y218 and
setting reaches the 15.00 unit position.
‘
‘contact 490 to the left-hand terminals of lamps
During this interval the ?rst, second and third
selecting‘circuits respond to the permutation code
445 to 409 corresponding to full units 5 to 9.
'
Forcodes corresponding to 06.00, 07.00, 08.00
and 09.00 units as may be'seen from reference to
vertical columns 105, 101, 100 and 109 in Fig. 7,
' com ‘I I3 closes its contact and consequently ‘the
armature of relay 202 is‘ operated to {its lower
position in each instance, This breaks the orig
inal path to ground over which the armatures of
relays 204 and 209 were operated to their lower
positions. But since as has been explained re
lays 204 ‘and 209 are locked over local paths within
the fourth selecting circuit itself, the armatures
of relays 2'04 and 209 remain locked in their lower
positions.’ This in turn-maintains relay 424 open -
ated to maintain battery ‘connected to the left
hand terminals of vfull units lamps 5 to 9 While
selections of these lamps are made by the third
selecting circuit which connects ground to each
one of their right-hand terminals as its proper
code is received from relays 1 I8 ‘to I 20.
Comparison of vertical columns 706 to 709 with
vertical columns 701 to 704 in Fig. 7 indicates
that the codes for settings 6 units to -9 units are
the same as for 1. unit to 4. units, respectively. '
‘
When the setting of the measuring instrument
reaches 15.00 units, reference to vertical column
N5 of Fig, 7 and the foregoing description indi
cates that cam H5 alone closes its contact. Con
sequently, the armature of relay 208 will be ac
tuated to its lower position over a circuit from
negative battery through contact I38, armature
of relay I20, left-hand winding of relay 208, con
tact ‘I41, armature of relay I25, contact I46, ar
mature of relay I24, contact I44, armature of re
lay I23, contact I42, armature of relay I22, con
tact I40 and armature of relay I2I to ground.
Positive battery connected to the armatures of
each of relays I I6, H1, H8 and H9 will operate
the armatures of relays 30I, '20I, 202 and 204 to
engage their upper contacts.
The cooperation of the ?rst and second select
ing circuits will result in the usual selection of
the .00 lamp in lamp bank 450. The third select
ing circuit will connect battery to the right-hand
terminal of full units lamps 0 and 5. The fourth
selecting circuit will 'reoperate relay 423. Under
this condition a circuit may be traced from bat
2,405,618
25
26
tery through the-armature of relay'v208, contact
.
lamps indicates that the measuring instrument is
240 and contact 2I0? to parallel circuits; One
branch extends throughcontact 43I and through
setin the 20.00 position.
'
'
‘
’
»'
,
'
'
"
I
1
For the 25.00 position of the measuring instru
ment reference to verticalcolumn 725 of Fig.v .7
the ?lament of lamp 421 to ground to maintain
the middle tens lamp lighted. The second branch
extends through contact 432 to the left-hand ter
minal-of lamps 445 to 449 corresponding to full
units 5 to 9. Lamp 445 or unit lamp 5 will light.
indicates that cam I I4 only closes its contact. ‘As
a result of this the armature of relay H9 is ac;
tuated to its lower position closing contact I36.
The armatures of relays II6, I H, H8 and I20 are
The lighting of this combination of lamps pro
all operated to their upper positions. The 00--v
10 operation of the first and second selecting circuits
vides the 15.00 unit indication.
Reference to Fig. 7 discloses that the codes for
again e?ects the selection of .00 lamp in the
each of the four different full unit settings be
hundredths lamp bank. The third selecting cir
tween multiples of ?ve are the same.
For in
' cuit connects ground to the right-hand terminals
stance, the codes for l, 2, 3 and 4 units are the
of units lamps 440 and 445m the same manner
same as for 6, 7, 8 and 9 units, etc. The third se~~ 15 as heretofore described. The armature of relay .
lecting circuit functions in the same mannervfor
204 in the fourth selecting circuit will be actuated
each group of four. For each» code received by
to'itslower position to close contact 232;, vThe
the third selecting circuit ground is connected to
armature of relay 209 in the fourth @selectingc'ir
the right-hand terminal of a different lamp in
cuit will be actuated to its upper position to close,
each of the two groups of units lamps.
' ~
contact 24I. A circuit may be traced which-ex
For the 20.00 unit setting, reference to'ver
tends from battery through thearmature ofrelay
204, contact 232,,armature of relay 209, contact
24L contact 294 and the winding of- relay 425 to
tical column 720 indicates that cams H4 and H5
close their contacts. The annatures of relays I I9
and I20 will be actuated to their lower positions.
When the armature of relay H9 engages with its
ground closing the-contacts of relay 425.‘ ,The
armature of relay 208 in the ?fth selecting circuit
remains locked in engagement with‘ contact 240.
bottom contact a circuit is established from nega
tive battery through contact I 30, armature of
A circuit may be traced'from battery through the
armature of relay'2'08, contact 240 ‘and contact
relay H9, conductor 353, left-hand winding of.
relay 204, conductor 351, contact I45 and through
2I6 to parallel branches. zone‘ parallel branch
the armatures and upper contacts of each of the 30 extends through contact 49I which‘connects'to
other relays in the chain circuit which extends to
the left-hand terminals of units lamps 445m 440
ground connected to the armature of relay I21.
in parallel. Units lamp 445 corresponding to 5
The armature of relay 204 will be actuated to
units will therefore light. The second parallel
4 close its contact 232. When the armature of relay
branch extends through contact 438 and the ?laé
I20 engages with its contact I38 a circuit is closed
ment of lamp 428 to ground lighting lamp-428.
which extends from negative battery through
Lamp 428 as explained is the-20 tens lamp.‘ The
contact I38, armature of relay I20, left-hand
winding of relay 209 to conductor 35'! which also
extends to ground connected to the armature of
_ relay l2I. The armature of relay 209 will be ac
lighting of thiscombination-of lamps-indicates
that the measuring instrument is in'thei25.00
position.
40
"
'
_
-
It is pointed out that ‘in the description above
of the'operation for the-00.00 position" it was
stated that the armatures of the relays wereiin
the positions indicated, but the manner‘in-which
tuated to connect with its lower contact 242. The
armatures of relays H5, H1 and H0 will all be
actuated to engage with their upper contacts. As
a result of this the armatures of relays 30!, 20I
the armatures of‘therela'ys inithe second, third,
and 202 will all engage their upper contacts. 45 fourth and fifth selecting circuits were operated
Under this condition the ?rst and second select
to these positions was not explained. This will
ing circuits will cooperate as heretofore described
now be made clear.
; . .
1:‘
to select the .00 lamp in the hundredths lamp
Reference to vertical columns 500, 600 and ‘700'
bank 450. When the armature of relay 202 en
in Figs. 5. 6 and '7 shows that for this condition,
gages with contact 221 the third selecting cir 50 cams I00, III and II2 close contacts IBI; I60‘
cuit will connect ground to the right-hand ter-'
and H0. The armatures of relays I2I'an'd H6"
minals of units lamps 440 and 445 corresponding
will beoperated to their lower positions. ., The‘
to units 0 and 5. With the armatures of relays"
armatures of all other relays .in Fig. 1 will be 01')»
204 and 209 actuated to engage their respective
erated to their upper positions. .'Positive.- battery
lower contacts a circuit may be traced from loat
is therefore impressed through 1 the- left-hand‘
tery through the armature ofrelay 204, contact
windings of each of the relays in the second,
232, armature of relay 209, contact 242, contact
third, fourth and ?fth selecting circuits. Since
292 and the winding of relay 424 to ground closing
the armature of relay I2I is down the usual
the contacts of relay 424.
return path to ground for the operation of the
The armature of relay 08 in the ?fth selecting 60 relays in the second, third, fourth and ?fth se
circuit was actuated to its lower position to close
lecting circuits is open. For this condition an
contact 240 when the measuring instrument was
alternate path extends from conductors 355, 353
in the position corresponding to I5 units. The
and 35'! through contacts I48, I49 and I50 re
armature of relay 208 remains locked in this po
spectively. A chain circuit is established through
sition. A circuit may therefore be traced from
these contacts which connects each of these con
battery through the armature of relay 208, con
ductors to conductors 341. The left-hand Wind
tact 240 and contact 2IS to parallel branches.
ing of relay 208 also connects to conductor 347.
One of the parallel branches extends through
Conductor 347 extends through contact 32I, ar
contact 435 which connects to the left-hand ter
mature of relay 304, contact 3I9, armature of re- I
minals of units lamps 440 to 444. Lamp 440 cor
lay 303, contact 3I'I and the armature of relay
responding to the 0 units lamp will therefore
30| to ground. The, armatures of all of the re
light. The second parallel branch extends
lays in the second, third, fourth and ?fth select
through contact 434 and the ?lament of lamp 420
ing circuits are therefore operated to their up
to ground lighting lamp 423. Lamp 428 is the 20
per positions. As a result of this relay 423 is
tens lamp. The lighting of this combination of <. operated. The cycle may then be repeated.
2,405,618
27
~
Relays 22!, 222, 223 and 224 are maintained
4. In a permutation code signaling system, a
in the positions shown at all times in the pres
ent invention. It was pointed out that the pres
entv invention is arranged to measure increasing
quantities. A rotational control circuit 593,
which is not part of this invention,_ is indicated
by a rectangle. By means of the rotational con
trol circuit which connects to all ?ve selecting
circuits and control relays Hi to 224 the circuit
herein may be modi?ed to measure both increas
?rst, second and third transmission channel,
means for impressing either of two electrical
conditions on each of said channels to form For
mutation code signals, a ?rst selecting device
comprising a switch selectively operable to either
of two positions connected to said ?rst channel
only, a second selecting device independent of
said ?rst device comprising two switches each
selectively operable to either of two positions con
nected individually to said ?rst and said second
channel, a third selecting device independent of
each of said other devices comprising three
switches each selectively operable to either of two
ing and decreasing quantities. However, this
feature is not part of the present invention and
no claims are directed to it hereunder.
What is claimed is:
,
1. A plurality of selecting devices connected in
positions connected individually to said ?rst,
parallel to a single transmitter, means for trans
mitting a single permutation code signal com
bination from said transmitter to said devices
ing three separate independent ultimate selec
tions simultaneously through paths through said
second and third-channels, and means for e?ect
simultaneously, means for effecting ultimate se
lectionsby said devices in response to the co
switches in each device in response to a single
multielement permutation code signal combina—
operative action of a plurality of signal elements
of said combination and means for simultane~
tion impressed on said channels.
5. In a permutation code signal data trans
ously e?ecting ultimate’ selections by said de
mission system for transmitting code signals cor
responding to numbers de?ning measurements
vices in response to single signal elements of said
combination‘ ~
by a data measuring instrument, a ?rst, second
and third set of cams, means responsive to the
2. A, single permutation code signal transmit
ter connected to a plurality of selecting devices
arranged in parallel, means for transmitting per
mutation code signal combinations from said
operation of said instrument for operating said
in said devices for identifying each of the digits
cams, a ?rst, second and third set of contacts,
means responsive to the operation of said re
spective sets of cams, for arranging each of said
respective sets of contacts so that each set forms
of any number from 0 to 100, inclusive, means in
permutation codes de?ning a separate portion
transmitter to said devices simultaneously, means *
said devices for effecting selections by said de
of a mulitdigit number corresponding to a
measurement made by said instrument, a plu
vices in response to the cooperation of at least
three signal elements of a multi-element per
mutation code signal combination at a ?rst time
and means for controlling said ‘devices individu
ally in response to the condition of individual
signal elements of a permutation code- signal
combination at a second time.
rality of separate signal transmission channels,
means for connecting said channels to said ?rst
set of cams so as to transmit permutation code
signals de?ning a ?rst portion of said number
at a ?rst time, means for connecting said chan
#10 nels to said second set of cams so as to trans
3. A‘ single permutation code signal transmit
ter, means connected to said transmitter for
transmitting permutation code signal combina
tions to four separate independent selecting de
vices connected in parallel to said transmitter,
means for effecting selections by one of said de
mit permutation code signals de?ning a second
portion of said number at a second time, means
for connecting said channels to said third set
of camsso as to transmit permutation code sig
nals de?ning a third portion of said number at
a third time and means for de?ning a ?rst por
tion of a number and a second portion of a num
ber by means of a portion of a permutation code
vices in response to the cooperative action of a
group of elements of a single permutation code
and de?ning the third portion of a number by
signal combination at a ?rst time, and means for
simultaneously controlling a group of said de 50 the remaining portions of a code when said chan
vices individually to effect a separate independ
nels are connected to said third set of cams to
de?ne the corresponding complete setting of said
ent ultimate selection by each one of said group
measuring instrument at a fourth time.
of devices in response to the condition of sepa
rate individual elements only of said permutation
code signal combination at said ?rst time.
55
EDWARD ' M. SMITH.
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