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Nov., 5_5, 19.46,
A. E. JQEL, .1R
2,410,446`
PULSING SYSTEM
Filed March 2,' 1944
_ ,2r sheets-sheet 1
QQ
l
/A/l/EA/ To@
By A. E JOEL, JR
www@
Nov. 5, 1946.
A. E. JOEL, JR
>2,410,446 ^
PULSING SYSTEM
_ Filed March 2, 1944
2 lSheets-Sheet 2
Sl «YlÈ'
QS
_
/M/ENTOR
,4.5. JOEL, JR.
Patented Nov. 5, 1946
2,410,446
UNITED STATES PATENT-onion
2,410,446
PULSING SYSTEM
Amos E. Joel, Jr., New York, N. Y., assignor to
Bell Telephone Laboratories, Incorporated, New
York, N. Y., a corporation of New York
.
Application March 2, 1944, Serial No. 524,669
5 claims. (014171-380)
i 1
This invention relates to signaling systems and more particularly to pulsing devices for such
systems.
'
The pulsing devices for the signaling system
The object of the present invention is an im-y
provement in pulse _transmitting mechanisms.
of the invention will be applied to a telephone
system but may be used in diñerent types of sig
A feature of the invention consists in a pulse
naling systems.
Referring- to Fig. 1, the pulse transmitter |0|
and the pulsereceiving and transmitting device
storingI and transmitting device arranged to
transmit one pulse over a line responsive to
storing a given number of pulses received from
a pulse transmitter or for transmitting one pulse
responsive to receiving one pulse from the pulse
transmitter.
|00 comprising relays |02 to |08, inclusive. may
_belocated in one telephone office and connected v
by a long two-conductor line`||0 to the pulse
receiving and transmitting device |50 comprising
relays |52 to |51, inclusive, in another telephone
oñlce. The pulse transmitting relay |6| may
’
lAnother and related feature of this invention
consists in a pulse receiving and transmitting
device arranged to multiply by a given value a
series or plurality of pulses received over a
line and to transmit said increased number of
pulses and also arranged to omit multiplying a
single pulse or an odd last pulse of a series of
pulses received over said line, thus responsively
transmitting a single pulse.
Another and related feature of this invention
consists in a high speed pulsing system for oper
ating electrical mechanisms connected by long
lines employing pulse receiving and transmitting
also be located in the distant oilice for operating
switch controlling mechanisms. .The long line
| |0 may be a telephone transmission line of Well
known character and may be automatically con
nected to lines |09 and |60 which may also be
transmission lines. Such lines may be used for
the transmission of pulses and for voice trans
mission as shown in Patent 2,236,246 issued to
G. V. King et al. M‘arch 25, 1941, and Patent ap
plication Serial No. 495,487, iiled by J. W. Dehn
25 July 20, 1943 now Patent 2,355,908, granted Au
devices at the originating and terminating ends
of the line for dividing the number of pulses
received by a given denominator, transmitting
the quotient pulses over said line, and multi
plying the quotient pulses by said given denom 30
inator, thus transmitting only a limited >number
of pulses over the long line but transmitting the
and multiplies these pulses by 4 in a distant re
ceiving mechanism. 5
gust 15, 1944.
l The pulse transmitting contact |20 and the
pulse circuit closing contact |2| may be of the
character shown in the outward pulsing circuit
of the sender shown in the aforementioned patent
application to J .W. Dehn, or in other pulse trans
mitters wherein a contact such as contact |2| is
same number of pulses at the distant end of the
closed when the outgoing line is taken for use,
line as received by the device at the originating
thus operating a line pulsing relay such as relay
end.
35 |02 which is released for the transmission of a
Another and related feature of this invention
pulse when the pulsing contact V|20 is opened
is a. system including means Afor dividing the
_but otherwise remains operated during the en
greater portion of the whole number of pulses
tire pulsing period.
by a given denominator and transmitting the
~ By reference to the pulsing circuit of the afore
quotient pulses over said line, means at the ter 40 mentioned patent application to J. W. Dehn it
minating end for multiplying this number of
will be found that the speed of the pulse trans
pulses by said given denominator, and means at
mitter is automatically regulated according to
the originating end for transmitting the remain
der odd pulses, the means at the terminating end
serving to transmit said odd pulses Without mul
ltiplying them by said given denominator.
The foregoing and other features of the in
vention will be described more fully in the fol
lowing speciñcation which should be taken in
connection with the >accompanying drawings and
appended claims.
Referring to the drawings:
.
the mechanism to be operated in a distant office. .
High speed pulsing is employed over trunks or
45 lines for the operation of sender mechanisms
in distant offices. This effects a saving in hold
ing time in the pulse transmitting mechanism,
the line, and all mechanisms associated there
with `K`for completing telephone connections. A
slower speed of pulsing 'is used when the distance
is great between the originating and distant of
l fice and the interconnecting line is longer than .
may be used for high speed pulsing or the mech
used with a two-wire line in which Fig. 1 is ar 55 anism in the distant otiice is of a character which
will not satisfactorily follow the high speed
ranged to transmit half the number of pulses over
pulses. The high speed or low speed pulsing
a line as received from a pulse transmitter and
transmitter may be automatically regulated by
Figs. 1 and 2 illustrate the signaling system as
multiplies by 2 the number of pulses received
over the line and Fig. 2 divides the number of
pulses by 4 in order to send one pulse over the
line for each 4 received from a pulse transmitter
routing relays or other devices which control
the connection of the pulse transmitter and later
the incoming lines to lines such as line |09 ex
tending to other offices in a manner shown in
2,410,446
the aforementioned patent application to J. W.
Dehn. Switches such as switch |22 diagram
matically shown, maybe used ior such con
nections.
`
battery. The operation of relay | 52 closes an
obvious circuit for operating relay |53 and also
an obvious circuit for operating relay |54 which
' locks to ground on the lower contact of relay |53.
.
The operation of relay |54 establishes a circuit for
pulse transmitting relay IBI through its contact 2.
It will be noted that the circuit for relay |6| ex
||0 responsive to two high speed pulses trans
tends through the contacts of relay '|51 and con
mitted by the pulse transmitter contact |20. The
tact | of relay |53 in parallel and thus relay IBI
pulses received in the distant oñ'ìce over the line
||0 are multiplied by the relay mechanism |50 10 may be released by the operation of relay |5`| if
relay |53 is operated but not when relay |53 is
and two pulses are transmitted over line |00 to
The pulsing system shown in Fig. 1 is ar
ranged to transmit one pulse over the long line
pulse transmitting relay |6| responsive to each
released.
l
.
The mechanisms |00 in the originating oiîice
and |50 the distant omce are now prepared for
automatically by the mechanism |00 when the
digit comprises an odd number of pulses or only 15 receiving and transmitting pulses. Each opening
. of the pulse transmitter |20 causes the release of
one pulse. In the latter instance the one pulse
relay |02 but since relay |03 is slow to release
or the last pulse of a digit containing an odd
it remains operated during this open period of
y number of pulses is transmitted over the long
the pulsing contact. For the sake of simplicity of
line ||0 and the mechanism |50 of the distant
omce is controlled so that it does not multiply 20 description and to make the progressive opera
tion of the relays in each omce easier to follow,
this pulse and thus transmits a single pulse over
the following table of operations is given illus
line |00 to cause a single release of the pulse
pulse over the line | I0. An exception- is made
transmitting relay IBI.
trating the relay action in pulse receiving and
of line || 0 and upper winding of relayl |52 to
for controlling transmitting relay |6|.
transmitting device |00 following each pulse from
The closure of contact |2| when the line is
taken for use operates relay |02 which operates 25 contact |20 of transmitter |0| for transmitting
half the number of pulses over the line ||0 and
relay |03 by the closure of its contact. Relay |03
theresponsive action in the pulse receiving and
in operating closes the line ||0 through its con
transmitting device |50 for transmitting twice as
tact 3 to establish a circuit for relay |52 in the
many pulses as received over line H0.
distant office. This circuit may be traced from
This table illustrates the action responsive to 4
' ground through the lower winding of relay |52, 30
pulses over line |09 from transmitter |0|, 2
lower conductor of line ||0, lower contact of re
pulses over line ||0 and 4 pulses over line |60
lay |08, contact 3 of relay |03, upper conductor
Pulse transmitter
100
Contact 121 closed
Line 110
150
102 operated
’
Final pulse transmitter
152 operated
103 operated
-
151 operated
153 operated
154 operated _
Contact 120 opened 1st pulse
102 released
104 operated
i
105 operated
108 operated
152 released
155 operated
'
157
Contact 120 closed
102 operates
107 operates. lower winding in series
.
operated-_line
160 opened.
156 slow operated
157 released
Line open, 1st pulse
151 released lst pulse
161 operated
‘
Line held open
with 108.
Contact 120 opened 2d pulse
102 releases
107 locks to 102
106 operates
l
108 releases
155 releases
Line cloœd
'Contact 120 closed
102 operates
107 releases
106 releases
Line held closed
Contact 120 opened 3d pulse
102 releases
2d pulse over 110
'
.
152 operates
u
108 operates
157 operates
161 releases 2d pulse
156 slow releases
157 releases
101 operates
152 releases
155 operates
Line open
.
157 o rates
'
löl releases 3d pulse
156 s ow operates
157 releases
Contact 120 closed
..
Contact 120 opened 4th pulse
102 operates .
107 operates in series with 108
161 operates
Llne held open
102 releases _
107 locks
106 operates
-
108 releases
152 operates
155 releases
/
`
Line closed
,Crärteräz 120 closed, remains 102 operates and remains operated
ose
.
»
.
l
161 operates
e
'
106 releases
104 releases slow
105 releases slow
161 releases 4th pulse
152 remains operat
.
.
153 remains operat
,
107 releases
157 operates
156 releases
157 releases
,
Line held closed, no
pulse.
e
.
154 remains operat
ed.
2,410,446
The following illustrates the action of the puls- `
ing system when a digit comprises only one pulse:
Pulse transmitter
clear as outlined in the foregoing tables with
the possible exception of'theoperation of relay
100
Contact 121 closed
102 operated
103 operated
Contact 120 opened 1st pulse
102 released
104 operated
105 operated
Line 110
'150 ~
152 operated
153 operated
154 operated
108 operated
One pulse
152 released
Final pulse transmitter
161 operated
‘
155 operated
Line opened
Contact 120 closed, remains
closed
102 operated
107 operated in series with 108
104 releases slow
'
Line closed
The following illustrates the action of the puls- ’ 20
ing system when a digit comprises three pulses.
The i'lrst two pulses are transmitted the same as
shown in the table for a four-pulse digit, i. e., two l
pulses by the pulse transmitter, one pulse over
line ||0 Iby the pulse receiving and transmitting
mechanism |00 and two pulses by the pulse re
ceiving and transmitting mechanism |50 over
line |60. `II‘he odd third pulse is transmitted in
the following manner:
Pulse transmitter
l
102 releases
'
Line 110
2nd pulse vover 110
ì
156 released
152 operated
153 operated
Line opened
150
157 operated
153 releases
154 remains operated
155 releases
156 releases
‘_
Line closed
-
161 releases 3rd pulse
156 slow operates
157 releases
102 operates, remains operated
107 releases
Final pulse transmitter
152 releases
107 operate in ,series with 108
104
releases slow
105 releases slow
108 releases .
161 remains operated
No pulse
155 operated
v
closed
161 operated
|01. By reference to the tables outlining the opf
_
Contact 120 closed, remains
161 released one pulse
157 released
153 releases slow
154 remains operated
156 slow operated
eration of the relays for the first and third pulses
it is seen .that relay |08 is operated when relay
|02 is released. The circuit for relay |08 ex
25 tends i'rom ground on the back contact of relay
|02, back contact of relay |01, winding of relay
|08 to battery. This opens line ||0 causing the
release of relay |52 as shown in the table. The
operation of relay |08 establishes a circuit for
relay |0'|_ ground on contact 2 of relay |03, con
100
108 operated
157 operated
155 released
105 releases slow
108 releases
107 releases
Contact 120 opened 3rd pulse
'
v161 operates
h
161 remains operated
No
pulse
l
152 operates remains
operated
153 operates
It is apparent from the foregoing that relay |03
is slow enough in releasing to remain operated 45 tact of relay |05, contact of relay |08, contact of
relay |06, lower winding of relay |01, winding
during the pulsing period when relay |02 is re
of relay |08 to battery. This circuit is not effec
leased and thus relay |03 remains operated dur
tive for operating relay |01 until relay |02 again
ing the complete pulsing period which may com
operates since a ground shunt extends from the
prise a number of digits. Relays |04 and |05
back
contact of. relay |02 released through the
are operated responsive to the first release of re- 50
«back contact and winding of relay |01.' Thus re'
lay |02 and are slow enough in releasing to re
lay |01 has ground on both Winding terminals
main operated when relay |02 is Operated dur- v
and does not operate. Upon the operation f
ing the pulsing period for one digit but after the
relay |02 the first circuit established from ground
pulses have been transmitted for each digit re
lays I 04 and |05 release during the interdigital 55 on contact 2 of relay | 03 operates relay |01 in
series with relay |08, the latter relay remaining
period since relay |02 remains operated a longer
operated. When relay |02 is again released re
time between digits than between pulses. With
sponsive to the second or fourth opening of puls
reference to the distant ofllce receiving and
ing contact |20 as shown, relay |01 is locked
transmitting relays it is also apparent that the
its contact and upper winding and relay
slow release relay |53 remains operated during 60 through
|06 is operated in this locking circuit. 'I‘he op
the complete pulsing period which may comprise
eration of relay |06 opens the circuit through the t
a. number of digits except when the last pulse
lower
winding of relay |01 and the winding of
of a digit is an odd pulse. In this case as shown
relay
|08.
This causes the release of relay> | 08
in the third table the line ||0 is held open for
along enough period to cause the release of relay 65 which now closes line ||0 and operates relay |52
for the second pulse over line |60. Relay |02
|53 but not for a long enough period to cause
again operates when contact |20 is closed which
the release of both relays |53 and |54.l It will be
opens the locking circuit for relay | 01 and the
seen that relay |54 is originally operated to close
operating circuit for relay |06 and both relays
the operating circuit for the pulse transmitting
release. At this time relay |02 has been twice
relay |6| and locked to ground on contact 3 of 70 released
and reoperated by pulsing contact |20
relay |53 and thereafter relay |54 remains oper
but relay |52 has been released once by one pulse
ated during the pulsing period which may com
over line ||0 and is now reoperated.
i
prise a plurality of digits.
By
reference
to
the
table
it
is
apparent
that
The operation of the pulse receiving and
transmitting mechanism |00 is believed lto be 75 the one release of relay |52 causes an open and
closed period of line | 60 and thus causes relay '
^
2,410,446
7
I 6I to release and reoperate to transmit one pulse.
The operation of relay |52 also causes an open
and closed period of line |60 and thus causes re~
lay |5| to release and reoperate totransmit an
other pulse in response to one pulse over line | I0.
As will be seen from the tables, the original op
eration of relay |52 causes the'operation of relay
|53 and thereafter the release of relay |52 op
erates relay |55 which establishes circuits for
both re1ays|56 and |51. Relay |56 is slow enough 10
in operating to lag behind the operation of relay
|51 which is a fast operating relay. The time lag
of relay |56 behind relay |51 is approximately the
time period of one pulse. This causes relay |51
to operate from battery through its winding, con
tact 2 of relay |55 operated, contact of relay |56
8
one received~ over line |10. The release of relay
|56 causes the release _of relay |51 for terminat
ing the pulsing period o1 relay |6|.
As already set forth, the above applies to a
series of pulses which -may be divided by a given
denominator with the quotient pulses transmitted '
over line l I0 and multiplied by the denominator
by the mechanism |50. A single odd pulse is
transmitted as described by one open and closed
period of transmitter contact |20 which releases
and reoperates relay |02 causing one open period .
of line |10 and one open period of line |60. Since
relay |02 is thereafter held Operated the line ||0
remains open and relay |52 remains released until
relays |04 and |05 release. Under this condition
relay |53 momentarily releases to hold line |60
closed through its contact l and release relays |55
and |56 so that when relay |52 is reoperated a
second pulse will not be transmitted over line |60
released to ground on contact 3 of relay |53.
Line |60 is thus opened by the operation of relay '
|51 causing the release of pulse transmitting re
lay |6|. 'I'he operation of relay |56 opens the 20 to release relay |6|.
Relay |52 is reoperated
when relay |08 is ñnally released.
circuit for relay |51 which causes the reoperation
Fig. 2 illustrates the same circuit arrangement
of relay |6|. Since line' ||0 is held open until
as Fig. 1 with relays ||2 and ||3 added to the
after two pulses hase been received by the device
pulse receiving and transmitting circuit in the
|00, relays |55 and |56 remain operated. The
line ||0 is closed by the release of relay |08 which 25 originating oilice and relays |66 and |65 added to
the pulse receiving and transmitting circuit in
terminates the period of one pulse over line ||0.
the distant terminating ofiìce for transmitting one
This causes relay |52 to again operate which re
pulse over line |||| responsive to each four pulses
leases relay |55. Relay |51 now operates over a
originated bytransmítter |0I and for transmit
circuit through the contact of relay |56 operated
and contact 2 of relay |55 released since relay 30 ting four pulses over line |60 causing four re
leases of relay |6| responsive to each pulse trans
|56 has the same time lag in releasing as in oper
mitted over line ||0.
ating. The operation of relay 151 again opens
The following table shows the progressive
the line |60 causing the release of relay IGI and
action of therelays of Fig. 2:
'thus two pulses are transmitted by relay |61 for
.
-Partlal pulse trans
Pulse transmitter
130
Contact 121 closed
Line 110
170
102 operated
152 operated
103 operated
153 operated »
’
Contact 120 opened 1st pulse
161 operated
154 operated
102 released
104 operated
105 operated
l
108 operated
Opeuiîäie line 110-1st 152 released
p
155 operated
157 o rated
156 s -operated
157 released
I
112 operated lock to 103
Line 110 held open
164 sl-operated
157 o erated
165 s -operated
157 released
Contact 120 closed
102 operated _
Contact 120 opened 2nd pulse
102 released
107 locked to 102
106 operated
,
mmm
~
161 released-1st pulse
161 operated
161 released-2nd pulse
161 operated
.
107 operated 1n series with 108
‘ 108 released removes shunt from 113
Line 110 held open
by ct l-ll2
113 operated
ruis@ transmitter
Contact 123 closed
' C o ntact 120 o pe ns 3rd p nise
10o
Line 11o
16e
Pmißlnä’i‘tlëgî mm’
102 operates
107 releases
106 releases
102 operates
releases
108
Closes line
112 releases
through
`
o1 113
110
contact
.
152 operates
155 releases
157 operates
156 slow releases
161 releases 3rd pulse
157 releases
Contact 120 closes
Contact 120 opens 4th pulse
102 operates _
106 operates
108 releases
Contact 120 closed
u
107 operates 1n series 108
102
107 releases
locks to 102
113 releases
102 operates
13g releases
164
releases
157 slow
operates
_
Line 110 held closed
by contact 2 of 108
and 112
165 slow releases
157 releases
‘ pulse
161 releases 4th
161 operates
andere
The operation continues for the ñfth, sixth,
period of relay |02 in readiness for the next series
of four pulses.>
The third and fourth pulses are transmitted
seventh and eighth pulses according to the above
table or for any multiple of four puises from the
pulse transmitter |0i.
.
it is apparent from the above table- that in the
circuit arrangement of Fig. 2, relays |52 to |08
and relays |52 to |51, inclusive are operated and
released in the same manner as described for the ,
circuit arrangement of Fig. l. However, the ñrst
operation of relay |08 opens the line ||0 for re
y the receiving and transmitting device |15
when relay |52 is operated by the closure of line
||0 as above outlined andas shown in the table.
It will be recalled that relays |55, |56, |64 and |65
were operated for the transmission of the ñrst
two pulses over line |60. 'I'he operation of relay
10 |52 releases relay |55 and a circuit is thus estab
leasing relay |52 and also establishes an operating
lished for operating relay |51 for sending the third
circuit for the added relay ||2 from ground on
pulse. The release of relay |56 releases relay |51,
contact 2 of relay |05 and relay ||2 in operating
again closing line |60 and reoperating relay |6i.
locks to ground on this same contact. Relay | I2
opens linev ||0 through its contact I so that the 15 The release of relay- |56 causes the release of
relay | 61|, again establishing a circuit for relay
line remains open when relay |08 is vreleased by
|51 for opening line |60 for the fourth pulse.
the action of the other relays as previously de
The release of relay |65 follows the release of
scribed when the second pulse is sent by trans
relay |60 which releases relay |51 to close line
mitter contact |25. While relay |08 is operated
|60 after the fourth pulse. It may be seen _that
a shunt through contact 2 of relay || 3 and con
tact i of relay |06 .prevents relay ||3 from oper 20 the device |10 is transmitting pulses over line |60
at the saine time that the device _|30 is receiving '
ating but the release ci’ relay | 08 removes this
pulses from the transmitter | 0| and therefore
shunt causing the operating circuit for relay M5
they are both in readiness for the next series of '
to be effective. This operating circuit extends
pulses substantially at the same time.
from battery through resistance H5, winding of
The devices are made flexible by the use of
relay H3, contact 2 of relay H2, contact of relay 25
keys ||6 and |63 shown in Fig. 2. When key
|05, contact 2 of relay |03 to ground. Relay || 3
| I6 is in its normal positions as shown, the pulse
prepares a shunt for releasing' relay ||2 which is
receiving ’á‘nd transmitting device |30 is arranged
made eil’ective upon the next operation of relay
to divide the number of pulses received from the
|08 and also prepares a closing path for line ||0
which is eiïective upon the next operation of re 30 pulse transmitter |0| by the denominator four
and when keyy ||6 is operated it~ will divide the
lay |08. By reference to the table it will be seen
pulses i received by the denominator two. In
that the second operation of relay |08 takes place
each case the quotient pulses are transmitted
when the third pulse is sent vby transmitter con
tact |20.
.
'
over line |10. With key |653 in its normal posi
During the open period of line ||0 relay |52 of 35 tion as shown, the pulse receiving and trans
mitting device |10 is arranged to multiply the .
the pulse receiving and transmitting device |10 is
released. Relay |53 remains operated during this
period since the time for transmitting two high
speed pulses from transmitter contact |26 is sub
stantially the same as the time for transmitting
one pulse at ~the slower speed. Relays |55, |51
quotient pulses by the denominator four and
when key |63 is operated it will multiply the
quotient pulses by the denominator two. The
above, of course, applies to numbers of pulses
, which may be divided and multiplied by a com
mon denominator and single pulses or the last
and |56 are operated as previously described and
relay |51 is released >upon the operation of relay
odd pulse of a series of pulses are transmitted
|56 and the action of these relays transmits the 45 bythe devices as herein described. It is, ci’
ñrst pulse over line |60 causing the release and
course, apparent that any number of single pulses
reoperation of relay |6|. The operation oi’ relay
|56 in addition to releasing' relay |51 establishes
a circuit for slow-operating relay |64. The time
lag in operating relay- |64 permits relay |51 to
release and relay |6| to reoperate. Relay |64 50
closes a circuit for again operating relay |51 from
battery through the winding of relay |51, con~
maybe transmitted by the devices by using a
set period of time between pulses, which period,
for example, could be commensurate with the
normal interdigital period used in telephone
practice.
~
,
What is claimed is:
~
>1. In a pulse transmitting system, a pulse
tact of relay |613 operated, contact oi’ relay |65l
sending> transmitter operable to transmit trains
released, to ground on contact 3 of relay |53. Re
of pulses of variable numbers of successive pulses
lay |6| is thus released a second time when line 55 in each train, a ñrst pulsing mechanism, a sec
|60 is opened by the operation of relay |51. Re
ond pulsing mechanism, a line interconnecting
lay |64 establishes an obvious circuit for relay
said ilrst and second pulsing mechanisms, means
' |65 which opens the operating
|51, causing its release.
circuit for relay
for connecting said pulse sending transmitter to
said ñrst pulsing mechanism, means in said first
Returning to the receiving and transmitting 60 pulsing mechanism automatically operable in re
_
.
device |30 it will be seen that relay |08 operates
sponse to the number of pulses in. a train received
responsive to the third pulse sent by transmitter
contact |20, causing the closure of line H0, the
from said transmitter for transmitting a smaller . '
operation of relay |52 and the release of relay' | |2.
Line |10 is closed through contact 2 of relay |08 ' 65
operated, contact | of relay ||3 operated and con-`tact 3 of relay |03 operated. After the fourth
pulse is sent by transmitter. contact |20 relay
|08 is released but since relay ||2 was previously
g released the line H0 is held closed through con
'tact I of relay ||2 and relay |52l continues to be
operated. The release of relay |08 now-causes the
release of relay || 3 by opening its contact | and
the circuit restores to normal during the operated 75
number of pulses over said line than received '
-from said sending transmitter or for transmit
ting the same number over said line as-received
from said sending transmitter, and means in
said second pulsing mechanism for transmitting,
in response to each train of pulses received over
said line from said first pulsing mechanism, a
train of the same number of pulses as sent by
said sending transmitter.
y
2. In a pulse -transmitting system, ‘a pulse
sending transmitter loperable to transmit trains
of pulses of variable numbers of successive pulses
in each train, 'a ñrst pulsing mechanism, a sec
2,410,446
ond Apulsing mechanism, a line interconnecting
said first and second pulsing mechanisms, means
for connecting said pulse sending transmitter to
said first pulsing mechanism, means in said first
pulsing mechanism automatically operable in re
sponse to the number _of pulses in a train received
from said transmitter for transmitting a. single
pulse over said line responsive to receiving a
series of pulses from said transmitter and a
single pulse over said' line responsive to receiv
ing a single pulse from said transmitter, and
means in said second pulsing mechanism for
transmitting, in response to each single pulse re
ceived over said line from said first pulsing
mechanism, a train of the same number of pulses
as sent by said sending transmitter responsive
12
tween said first and second pulse receiving and
transmitting mechanisms, means for connect
ing said pulse transmitter to said first pluse
receiving and transmitting mechanism, means in
said first 'pulse receiving and transmitting
mechanism for transmitting over said line each
alternate pulse received from said transmitter
including an odd numbered pulse Awhen a series
of pulses terminates with an odd numbered pulse.
and means in said second pulse receiving and
_transmitting mechanism for transmitting two
pulses responsive to each pulse received over said
line excepting said lastl odd numbered pulse and
for transmitting only ' one pulse responsive to
receiving said last odd numbered pulse.
5. In a pulse transmitting system, a high speed
pulse transmitter, a first pulse receiving and
transmitting mechanism, a second pulse receiv
ing and transmitting mechanism, a line between
sending transmitter, a first pulsing mechanism, ~
said first and second pulse receiving and trans
a second pulsing mechanism, a line interconnect 20 mitting mechanisms, means for connecting said
ing said first and s'econd pulsing mechanisms,
pulse ltransmitter to saidv first pulse receiving
means for connecting said pulse sending trans
and transmitting mechanism, means in said first
mitter to said first pulsing mechanism for trans
pulse receiving and transmitting mechanism
mitting a series of pulses thereto, means in'said
arranged for transmitting over said line each
first pulsing mechanism for dividing the num
alternate pulse of a digit received from said
ber of pulses in said series by a given denominator'
transmitter and arranged >for transmitting only
and for transmitting the quotient pulses and a
one pulse over said line when the» digit comprises
remainder pulse over said line, and means in
a single pulse, and means insaid second pulse
said second pulsing mechanism for multiplying
receiving-andl
transmitting mechanism arranged
said quotient pulses received over said line by
for transmitting two pulses responsive to each
said denominator, for preventing the multiplying
single pulse received over said line when` a digit
of said remainder pulse and for transmitting
comprises an even number of pulses and arranged
therefrom the same number of pulses as con
for transmitting a single pulse when a digit com
tained fm said series.
4. In a pulse transmitting system, a high 35 prising vonly a single pulse is transmitted over
said line.
„
speed pulse transmitter, a first pulse receiving
AMOS E. JOEL, Ja.
to receiving said single pulses over said line.
3. In a pulse transmitting system, a pulse
and transmitting mechanism, a second pulse re- _
ceiving and transmitting mechanism, a line be
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