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Патент USA US2404466

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' July 23, 1946.’
Filed oct. 24, 1941
40‘ f0”
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July 23; 1946-
Filed Oct. 24, 1941
3 Sheets-Sheet 2
Patented July 23, 1946
Reginald Taylor and George Thomas Baker,
Liverpool, Engiand, and Arthur Charles Corner;
Calcutta, India, assignors, by mesne assign
ments, to AutomaticElectric Laboratories, Inc.,
a corporation of Delaware
Application October '24, 1941, Serial No. 416,378
In Great Britain November 13, 1940
21 Claims.
(01. 179—9')
2 ,
The present invention is concerned with call
recording arrangements for use in telephone sys
tems and while in particular it is applicable to
ferred. toa common position where a record may
be made either manually or’ automatically,
' arrangements of the type whereby calls can be
“recording equipment is operated independently
recorded automatically against calling parties on
of a connection between two subscribers to record
block unit calls against subscribers over whose
lines the aggregate value of calls made reaches
punched cards or tickets it has application to
manual recording arrangements if thefull auto
matic equipment is not desired.
It is an object of the invention to provide a
According to a further feature of the invention,
a predetermined value.
' ‘
According to a further feature of the inven
comparatively inexpensive and e?icient call re 10 tion an arrangement is provided according to
cording system of the above type and preferably
which each time a certain va'lueiof calls rhasr'been
one in which use is made of accounting machines
of known mechanical or electromechanical types
registered against a subscriber a signal’ is op
erated' to cause automatic recording apparatus
to be set in operation to record the designation
such as are often already employed by telephone
15 of the subscriber.‘ Preferably a counting ar
rangement‘ is associated with each of va number
The number of local fee calls or‘ calls which‘
of subscribers’ lines and is adapted to be operated
are registered on subscribers’ meters per day on
step-by-step in accordance with the value .of
a large telephone exchange is very high and may
calls, storage-means being provided for causing
be of the order of‘ 100,000 fora busy 10,000 line
exchange. To produce individual tickets or cards 20 a signal to be given each time a counting ar
rangement is operated through a'predetermined
for each of these calls is obviously out of the
extent to enable the charge to the subscriber to
question due to the large amount of tickets in
be recorded in multiples of the units registered
volved. The object of the invention is to pro~
on the counting arrangement. For this purpose
vide an automatic record While keeping the num
25 a momentary contactmay be made each time the
ber of tickets within reasonable bounds.
counting arrangement or motor is operated past
According to one feature of the invention a
a certain position or positions to cause the stor
connection is set up periodically between sub
age device to operate, the operation of said stor- ‘
scribers’ line equipment and recording equipment
age device ‘in turn controlling the operation of
to enable the aggregate value of calls chargeable
against a subscriber to be ascertained. Accord 30 ‘common equipment to cause the number of the
line with which the storage. device is associated‘
ing to a second feature of the invention a circuit
to be recorded and the storage device to be re
change ‘is brought about in a subscriber’s line
stored. in readiness to bev again operated when
equipment each time a predetermined aggregate
the meter again reacheszthe said position or if
value of calls is registered against said subscrib- there are more than one‘ of saidpositions, the
er, provision being made to prevent the circuit 35 next
position. Conveniently the ticket is punched :
change persisting after a record has been made.
or printed with the value of the calls against the
The predetermined aggregate value of calls may
number of the subscriber.
conveniently vary with the calling rate of the
individual subscriber.
The storing of the block values of callsmay be
conveniently eiiected by a relay with a locking
For a lightly used residential telephone a ticket 40 circuit but as this would mean‘ a relay for each
might be issued for a block equivalent to ten unit
line a further feature of the, invention concerns
the employment of a gas [discharge device to
fee calls, while ‘for heavier loaded installations
perform the functions of a ‘relay whereby a 'con
blocks of twenty, ?fty and one hundred unit fee
siderable saving may be effected as regards the
7 calls per ticket are proposed. Hence the number
costrof equipment individual to a jsubscriber’s
of tickets for the above-mentioned type of ex
line. This feature while particularly applicable
change may be reduced to the order of 2,000 per
to the storage of a block value of calls has also
day, and if they are made reasonably small in
more general application such as the replacement
size the handling of such quantities should pre
of a line relay and consists essentially of a mo
sent no problem.
‘ mentary contact being adapted to cause the strik
According to one feature of the invention each
ing of a gas discharge tube, the circuit being
time a predetermined aggregate value of calls is
maintained at a lower voltage, independent of the
registered against a subscriber the ‘identity of
momentary contact and the discharge tube being
the subscriber is automatically ascertained and
restored to normal'by having its terminal short
recorded, for instance; the identity may be trans
manner on a meter rack and to be wired out to
the multiple or the numerical side of the inter
mediate distribution frame VI.D.F. over which con
nection can be had with the associated sub
scriber’s line circuit in known manner. The inset
Fig. 1A shows a possible alternative for new ex
'. changes which in a manner to be later described
Alternatively to gas discharge means ’& C0117
denser might be employed but this would involve
a different arrangement, for starting the record
ing, for‘ instance the ?nders ‘might be operating
continuously. A further alternative might be the
shunting of the neon tube by a condenserso that
the condensers would retain a detectable charge
enables the amount of exchange cable required
after the discharge had been extinguished.
to be reduced.
; These and other features of the invention will
The mechanism MTR is provided with a make
be better understood from the following descrip 10
contact mtr which closes momentarily after a
tion of one method of carrying the invention into
eifect, reference being had to the accompanying» ' predetermined value of calls has been registered,
drawings comprising Figs; 1-3 which should be’ 7 which in the case of unit fee calls would be the
same as the number of effective calls (i. e. calls.
. . arranged side by side, with Fig. 1 on the left, te
form a circuit diagram of a completely automatic 15 which have to be'charged for), and in so doing
eifects storage of the unit on a storage device
equipment for aggregating and ticketing local
individual to each subscriber. In this instance
fee calls. Such calls have been hitherto usually
' the storage device takes the form of a neon tube
recorded on a meter mechanism individual to
which is normally primed to a value which is in
"together on a separate rack ‘so as toifacilit'ate the 20 su?‘lci'ent to cause it to' strike, but. which will
enable it to maintain a discharge once ‘it has
reading or photographing of their indications for
7 been struck as a result of the closure of the con
accounting purposes. For unit fee calls the
tact mtr.’ Other methods of storing the bulk
i meters are operated once 'where'calls of higher
each subscriber, the meters being usually mounted
unit such as condenser storage arrangements and
value are registered in the meter, the meters are '
operated twice or more times according to the
7' value of the cal1,-while where the calls are charged
the like could be employed but the above arrange
ment appears to o?’er the most practicable solu~
tion. Neon tubes need only be of a very small
for on a duration basis the meter may be repeat
‘ edly operated for a single call.
cheap construction with a Wired-in‘ mounting
and so‘ occupy little mounting space. The v'asso
For the purpose of aggregating the total charge
'to bemade'to each ‘subscriber, use is'made of a
‘ counting device similar to subscriber’s ‘electro
' mechanical step-by-step meter mechanism but
- modi?ed to provide a ?eeting electrical contact“,
each time a predetermined number of calls is“
» "As is known to those versed in the telephone
art the subscriber’s meter consists of an electro
ciated resistance required per subscriber can also
be of the small inexpensive type as used in radio
The neon tube when caused to strike in re
sponse to the registration of a bulk unit stores
35 the unit by the discharge being maintained and
at the same time starts up the identi?cation ?nder .
switches SF (Fig. 1) and PF '(Fig. 2). The set
ting'of these switches provides an indication of
, magnet, the armature of which operates, a set of‘
‘ counters via aratchet and pawl mechanism; the‘ ' the number and the class of the subscriber whose
V counters of a four digit meter comprising units, 40 neon tube has been located, and this indication
is obtained from the switches by a further switch
tens, hundreds and thousands wheels. The
PC (Fig. 3) which transfers it to the solenoids of
thousands and hundreds‘wheels are not required
in the present instance and can be removed while‘
the tens wheel can be replaced by a commutator
7 kind of wheel having an insulated surface on its ‘
periphery provided ‘with a number of metal in
j serts which number will vary according as to
whether a subscriber requires a ticket for, every
'ten calls ‘such as a residential telephone sub-F
automatically segregated by known mechanisms,
the invention is not limited thereto as printed
scriber,»a ticket every twenty calls,‘ a ticket every '
‘ ?fty calls‘ or a ticket every hundred calls. The
tickets could be sorted manually.
j metal inserts will be connected electrically to the
shaft and frame of the meter while an insulated
The ?nder switch SF shown in Fig. 1 com
prises a 25 point reverse drive electromag
contact spring will be supported from the frame
a punching mechanism, whereupona ticket char
acteristic of the subscriber's number and his class
is punched, and provides the record of a bulk
unit comprising 10, 20, 50 or 100 local fee calls.
It will be understood that while a punched ticket
enables the cards of various subscribers to be‘
to make electrical connection with a metal insert - ' while the commutatorrwheel is moving from one
‘ . position to the next while being out of electrical
_ connection, while the commutator wheel is sta
tionary. In this way a momentary earth connec
tion will be made to the insulated contact spring
every time it makes contact with a metal insert
whichwill take place ten times, ?ve times, twice
or once during a'revolution of the commutator
wheel according to the subscriber concerned. Ob
viously a new mechanism could be designed of
much more compact construction. Separate com
_ mutator wheels for each kind of subscriber could '
‘ convenientlyjbe constructedror alternatively in
sulationpieces instead of metal inserts could be a
, provided in positions where metal inserts are not
Referring now‘to Fig. 1, this shows on the top
left-hand side a meter mechanism MTR of a sub
scriber on a typical automatic exchange, which
netically operated step-by-step uni-directional
switch of known type with its wipers arranged
in pairs, one of the pair being at 180 degrees re
lationship with ‘the other of the pair, so as to
give a capacity of 50 points. .Two pairs of wipers
and banks SFI and SP2; .SF3 and SP4, are more
over provided-so as to give a capacity of‘ 100
points, discrimination as to the particular bank
utilised being effected by relays KA and KB in
Fig. 2. One such switch is provided per 100 group
of subscribers, and the position it takes up de
termines the tens and units digits of the partic
ular subscriber in question.
The remainder of the equipment required for
- recording purposes would depend on the size of
the exchange and could conveniently for a 10,0(30
line exchange consist of a two motion 100 point
‘selector switch operating‘ as a ?nder switch
which, in conjunction with the subscribers’
?nder uni-selectors mentioned above, would cater
fol-‘10,000 lines. For flexibility purposes, how~
mechanism is assumed to be mounted in ?léandéird 75. ever, so that the scheme can be readily applied
be very small and 'thezpotential-drop :acrossvlt
correspondingly small.‘ ' The voltage/current
‘the; smaller type of exchanges which are more
normally encountered, use is preferably made
characteristic of the dry contact. recti?er is such 3
that» with a small‘ applied voltage its resistance
is high, even though it is; in acond-uctive direc
tion, and‘ hence it will" impose little shunting cf‘
of a uni-selector type- of common access switch
which, with twenty-?ve sets of outlets would
cater for 2,500 lines, while four such units would
together cater for a 10,000 line exchange.
A 2,500 line unit of this typeis shown in part
of Figure 1, Figure 2 and in Figure 3 and in
cludes a uniselector switch PF" together with
feot on relay CR2
With two neon tubesin the
?ashed condition the voltage drop across relay
CR- will tend’ to ‘be greater, and ‘hence the metal
marking-potential testing equipment comprising 10 rectifierjwill lower its resistance and will‘ so main
tain the total voltage. drop across this part of
thermionic valves and associated relays. Also
the circuit at substanti‘aliy the-original value.
provided in this-unit is va vso-called' subsorib'er’s
Relay CR in operating at its. armature crl‘ ex
marking switch S which sets itself" to a position
tends earth on to- common lead M1 extending‘ to
in accordance with the position of the subscrib
the number register equipment associated with
er’s ?nder‘ switch SF and so enables the indica
the. 2,500’ lines unity ‘of which ‘the calling: sub
tion provided by the position of‘ the latter- switch
scriber’s line forms part, and at its armature 012
to be transferred into the common equipment in
extends a marking battery via resistance "YC‘ on
readiness for‘ registration. The unit also in
to a contact in thebank of wipenPFl- correspond‘
cludes the control uniselector PC which is com
mon to the. exchange and which serves to trans 20 ing to the particular hundred group'in the above
2,500v ‘line unit. The: earth extended over com
for in turns the indications from the switches
mon lead I4 completes a self-interrupted‘ driving‘
PF‘ and S‘ to the common punching equipment,
circuit"v for magnet PFM viacontacts Icwl, cf! ‘and
the solenoids of which are shown at the left of
interrupter contacts’ pfm. The switch PF there
Fig. 1.
Considering now the'operation of the circuit, 25 upon rotates its wipers until wiper PF4 encoun
when a bulk unit has been registered on meter
ters the marking“ battery applied by armature
_MTR the contacts- mtr are closed momentarily,
and in so doing extend the50 volts exchange-bat
"tery via the comparatively low resistance YA
(‘common to 100 subscribers), common lead l3, 30
cs2. ‘When this occurs the low resistance relay
0F‘ (Fig. 2‘) operates in series" with resistance Y0
and at armature cfl opens the magnet driving
circuit and completes an operating circuit‘ to
meter contact mtr, neon tube NT, and common
lead I I, winding of relay OR in parallel‘ with rec
ti?er MBA in a conductive direction, to an aux
iliary 50 volts positive battery which may be _
that employed for booster battery metering pur
poses. The two batteries assist one. another in
this condition and as a result ‘100 volts is applied
across the neon tube NT, whereupon it ?ashes
and relay CR. operates.
As will be described
later" the resistance of recti?er MBA in a con
ductive direction is not su?icientl'y low to pre
vent relay CR operating.
When the metering contact mtr opens,‘ the
discharge of neon tube NT is maintained by vir- .
tue of the permanent circuit ‘which is provided
therefor over, resistance Y8 and common lead iii
to which is connected 2. tapping of the order of
20‘ volts off the 50 volts exchange battery. The
~ 20 volts tapping together with the 50 voltsrposi
relay TS.
Relay TS in operating: at its ‘ax-matures ts!‘ and
tsZv connects up the grids of’thetestingthermionic
valves VA and VB to the wipers PFI and PM,
at armature ~t‘s3 completes heating circuits for
the ?laments of the valves via theresistances YD
and YE and at armature tsd extends earth over
armatures sci, sa'l- and leak, wiper and bank PF3,
interrupter contacts: sfm= and magnet SFM of the
40 ?nder switch SFiserving'the hundred line group
in! which the meter MTR is located. Magnet SFM
thereupon operates in a self-interrupted circuit .
to- rotate its' wipers in search of a position, corre
spending to the calling meter.
‘Testing for the particular meter ca-lling'is ef
fected in the following manner. When a neon
tube is in the extinguishedv condition, the poten- '
tial at the point under test is, owing to the prac
tically in?nite resistance of the unstruck neon
tive battery give a potential of 70* volts, but owing 50 tube, that of the battery tapping connection con
nected‘ to common lead l0, in this case 20 volts
to voltage drop in resistance YB due to the cur
with respect to earth. Resistances YD
rent. flow resulting from the striking-ofthe tube,
the tube itself will receive a potential less than
and YE in the ?laments of the valve circuits VA
and‘ VB‘ are of such value that the ?laments will
this value. This potential is, however, su?icient
be at a potential of- the order of ‘16 volts negative
to maintain the discharge of the tube, but it'will
earth, and hence if either of the‘wipers PFI
be understood that '70 volts potential acting‘alone
and PFZ encounter an undischarged neon tube,
is insufficient to bring about the initial discharge
then a, potential 20 volts negative with respect to
'of the neon tube so that a. permanent circuit of
earth will-be'applied to the grid of the associated
the type described can be connected up to the
thermionic valve, thereby rendering the particu
tube without causing any possibility of false op 00 lar
grid in question negative with respect to the
Relay CE in the subscriber’s, ?nder equipment
?lament, so that no anode current will flow to .
operate theanode relay- SAor SB. ‘Rotation of
is common to one hundred subscribers’ meters,
the SF switch wipers‘ will therefore continue until
audit is therefore possible that more than one
one or other of the wipers encounters the neon
neon tube in a hundred group will be in a ?ashed
tube which is in a state of discharge (1. e. with a
condition at any one time. To ensure that the
stored bulk unit thereon), whereupon a potential
potential drop across relay CR (and therefore
across neon tube NT when in the discharged con
dition after contact mtr has restored) remains
substantially constant irrespective of the num
ber of neon tubes taking current therefrom, use
is, made of the n0n~linear voltage/current char
acteristic of the metal recti?er MRA bridged
across it. With one tube only in the discharged
condition, the current flow through relay CR will
much’ less negative to earth than 20 volts nega
tive will be encountered. In the present case,
in discharging and’ consequently low
70 the
ering its resistance causes the potential‘ of the
point under test to moveaway from 20 volts nega
tive to earth and to advance towards 50 volts
' positive to earth owing to the voltage drop in the
‘Is-resistance YB. Assuming a current of two mil
i "2,404,466
'l'iampsis ?owin‘g‘i'n the neon tube locking circuit
anode relay SB. Relay SB functions in'similar
and that resistance YB is‘10,000 ohms'resistance,
then 20 volts will be dropped across'resistance
manner to relay SA. The operationof relay SB
completes a circuit for relay KB at $12! which in
turn at kbz completes a circuit for relay KA. ‘The
V YB and the point under test will therefore be at
earth potential. Provided this point is reduced
operation as far as relay KA is concerned is as be
. to a value less than 16 volts negative with respect
fore, relay KB modifying certain circuits as de
scribed hereinafter. In this way if relays SA, and
SB should both be operated simultaneously‘ as
might be the case the recording ofthe bulk unit
to earth, which is the mean valve ?lament poten
tial, then the thermionic valve grid'in question
will be rendered positive with respect to its ?la
ment and will allow anode current to flow such 10 represented by relay SB will have preference. At
armature Icbl (Fig. 2) the neon tube extinguish
'as will operate the magnet drivertripping relay
SA or SB as the case may be.
In case any one of the wipers SFl-eSFA ofv the
ing potential is extended from ‘resistance YF over
armature M3 and ts2, wiper and bank PF2, wiper
switch SF should encounter a contact connecting
and bank SP3 or SP4 and thence to the neon tube
with a, closed meter contact, a potential heavily 15 in question. Armature lcbz (Fig. 2) in addition
.to providing an'operating circuit for‘relay KA also
negative‘ with respect to‘ earth will be obtained
provides a locking circuit for relay KB. Arma
owing to the comparatively low resistance of vre
ture kb3 (Fig. 2) extends a circuit to wiper PF8
gsistance' YA, and hence the thermionic valve will '
.not come into operation. A permanently sticking
instead of wiper PF‘! while at armature kbd (Fig.
meter contact will not'therefore interfere with ‘20 3) the marking switch wipers and banks S3 and
.the registration of. thereadings of other meters . S4 are brought into operation instead of wipers
in the exchange.
and banks SI and S2»for a reason which willmbe'
'7 Itwill be noted that the grids’ of the valves VA 7 ‘appreciated in the ensuing description.
and VB are permanently connected to a 20 volt
The operation of relay NS‘v indicates that the
tapping on the exchange battery via the resist 25 marking switch S has been positioned on‘ a con
ances YG and .YH and it will be understood that
these resistances which are of very high value,
of‘the order of 2 megohms, merely serve to main
‘tact corresponding to the position occupied by
the subscriber’s ?nder switch SF, and at the same
time indicates that all particulars ‘of the block
tain at all times the potentials on the valve
metering unit in question are available.‘ The '
grids negative with respect to the ?laments, so 30 puncher control uniselector PC is now set into
as to prevent premature operation of the' relays
operation ?rst of all to ?nd theparticular 2,500 .
SA and SB or possible holding up of these relays
after they have been operated; owing to the high
value of the resistance this permanent connec
In the case of a 170,000 line exchange there are
four such groups, and the particular group in
tion to the valve grids does not interfere :with the 35 volved is marked on bank PCI or PC2 by arma
testing functions of the valves..
ture ns2 of relay NS in the number register equip
Returning again to the description, it will be
,ment serving it so that when magnet PCMof
assumed that relay SA operates thereby indicat
switch PC is operated in a self-interrupted driv
ing that the meter MTR in question is in the ?rst
ing-circuit including armature cs2, magnet inter‘
fifty of a 100 line group. Relay KA is therefore
.rupter contacts pcm, common lead |5fand arma
operated and at its armature kal disconnects the
tures nsl and K115 to earth, its wipers are rotated
.operating circuit for'the slow-to-release relay TS.
until earth marking potential is encountered by
' During the release of this relay, 50 volts positive
wiper PC] or P02.
potential is extended via resistance YF, armatures
For the purpose of example it will be assumed
kbl, M2 and tsl , wipers and banks P‘Fl. and either 45 that. the 10,000 line exchange in which meter
SF] 0!‘ SF2 and lead I2 so as toshort circuit and. '
MTR is located is situatedin an area employing
~ __extin.guish the glowing neon tube, and to release
' a ?ve digit numberingscheme, and that all sub
relay CR. ~>The same armature kaZ also causes ‘
scribers have 5 digit numbers commencing with
,the anode current ?ow in-the thermionic'valve
the digit “4.” ‘It will be further assumed that the
‘VA to cease, whereupon relay SA restoresl No, 50 number of the meter is 42311 so that it will be in
circuit can however‘ be recompleted to the switch
the ?rst 2,500 line group in the exchange.
.bmagnet SFMsince the circuit thereto is discon
, nected at armature kall.
Each 2,500 line group involves use of eight con
A locking circuit, is com
secutive contacts in, the switch banks .PCI and
pletedfor relay KA independently of the arma
PCZ and in the present instance the ?rst eight
ture sal at‘armature k‘a'l, At armature kaB an .55 contacts will be required for determining the set
earth potential is extended over ‘wiper and bank‘
tings of the switches PF and SM, Accordingly
PFs on to the wipers SF5 and SFG of the sub
the relay NS shown in operating will mark con
tact I of bank PC! with an earth potential over
contact ps2. Relay CS will therefore operate im
armature nsl to complete a self-interrupted driv .60 mediately and atiits armature cs2 will disconnect
ing circuit for the magnet SM of the marking" the driving circuit to the magnet PCM before this
’scriber’s ?nder switch, and’ at armature‘ ka5 (Fig.
3) an, earth potential ‘is extended over resting
switch S via its interrupter contacts sm. The
switch S thereupon rotates its wipers until wiper
_ magnet has time to move its armature away from
%S1 or S8 encounters the earth marking extended
will therefore remainin position 1., Relay CS in
the normal position, and‘the wipers of this switch
on. to bank SF5 or SFB from armature IcaS, where- .. 95 operating at its armature csl prepares alocking
upon an operating circuit will be completed for‘ “
relay NS which in operating cuts the driving cir
' cuit of magnet SM at-armature nsl (Fig. 3), and
atthe. same armature extendsa start earth over
common lead l5 into the'exchange puncher con—
trolunit in order to signal that full particulars of i -
'a block metering unit are available for recording.
circuit for itself over multipled contacts of switch
PC and at armaturecst’ completes an energising
circuitfor the slow-to-operate-and-release relay
IS by way of the magnet interrupter contacts pom.
Relay IS in operating at its armature is! energises
the slow-to-operate-and~release relay 1P, and this ..
relay in turn at its armature ipl extends earth on
to the wipers PC3 and P04, the banks of which
If the subscriber in question had been in the
second ?fty of a 100 line group, then valve VB
are wired out to the four groups of 2,500 lines in '
“would have come into ‘operation to bring up its;
the exchange, the wiring to the 2,500 line group
in question only, however, being shown, while at
armature i112 it completes an energising circuit for
magnet PCM. Magnet PCM in energising opens
itsinterrupter contacts pom and thereupon opens
the circuit .for relay IS. Thisrelay. releases after
a vshort interval and disconnects relay IP, where
hundred line group, then relay KZB would have
been operated, and, with the S switch wipers in
position 1 the subscriber.’s tens and units digits
would-have been 61.
The complete number 42311 has now been
punched on a card or ticketand it is new neces
upon after a further shortinterval PCM magnet
sary to record thereon the class of the particular
circuit is opened and the magnet in releasing then
subscriber involved in order that the value of
advances :the switch wipers to position 2. Relays
the’ ticket can be assessed. When the puncher
IS, ‘IP,, and the magnet ‘PCM continue to interact 10 .control switch wipers ,reachcontact ‘I it will be
and cause the PC switch wipers to be advanced
seen that earth is extendedin the present in
stance over resting armature Icb3, wiper and bank
step-iby-‘s'tep round the banks ataspeed governed
PFT, and wiper and bank SF‘! or SF8. Contacts
by .the ‘releasertimes of the relays.
of these banks are wired .out over asimple cross
The ten thousands’ digit '4 of the subscriber’s
number is common to all subscribers in the ex 15 .connectionframe CCF to the punching, solenoids
i, .2, 5 out] sothat a mark ornumber character
change, and hence the second contact in the se
istic of the class of the subscriber involved can
lected group in the bank P03 can be directly wired
be recorded onthe ticket.
via a simple cross-connection frame TTF, to the
punching mechanism solenoid 4- (Fig. 1). When
wiper P03 ‘encounters contact 2 earth is there
upon-extended over wiper and bank P03, the cross
connection frame and the connecting cable to
energize the puncher solenoid 4 so as to cause
this. number or a mark indicative thereof to be
punched on a card or ticket.
In case the required number should comprise
‘only four digits, this contact on the switch bank
P03 would be wired out to the puncher spacing
solenoid SS so that the’ card :Or ticket will be dis
placed a distance corresponding. to ‘one character
When theswitch PC reaches the eighth and last
contact in the selected group relay RR therein is
operated and at its armature rvr-l (Fig. 2) releases
relayKA (and relay KB in addition if this has
been operated) whereupon relay NS is released
and the circuit to relay IS in the puncher control
equipment isopened while at the same time relay
CS therein .is also restored to normal so that the
equipment .is nowin readiness for further use.
It will .be noted that
of the homing type so
position, in response to
unit on another meter,
none of the switches are
that hunting for a new
the completion of a bulk
ContactsBand 4 on bank P03 are'wired out to
will take place from the
‘position which they occupy at theconclusion of
the previous set-up. The recording of local fee
wipers PF5 and PEG, the position of which de?
calls in bulk units against other subscribers on
termines the thousands and hundreds digits re- . I
the exchange will be appreciated on examination
of the wiring arrangements to the banks of the
in readiness for the ‘reception of the thousands
digit from the puncher‘eontrol equipment.
.spectively of the meter MTR. 1n ‘the present
case, since these digits are respectively 2 and 3,
they will be indicatedin the following manner.
The switch PF serves to determine the particular
switches PF and vSM in Figs, 2 (and 3. In this
connection it should be understood that the fig
‘ures shown 'in brackets against the thousands
hundreds group in which the discharged. neon 40 ‘and hundreds digit determining banks PF5 and
PFS (Fig. ‘3) refer to the connections of equiva
tube is located, and since in the ?rst 2,500 line
lent banks to the punching magnets in number
group in the exchange the thousands digit of the
registers associated with other 2,500 line groups
subscriber’s numbers can ‘be any of the digits .1,
on "the exchange. ‘Thus while number 3488 will
2 or 3, the twenty-?ve contacts in the banks of
switch PF can be divided up into twogroups of 46 ‘be: in the ?rst 2,,‘5010 line ‘group and will be marked
onthe 24th contacts of PF5 and PFG jointly, the
ten and one group of :?ve. If the wipers of this
number 3688'wi1l be marked on the 21stcontact of
switch occupy any .one of the ?rst ten contacts
contacts of another pair of wiperssimilar .to PF5
in the bank then the thousands digit will be 1,
and PFB and connected to the appropriate con
while if theyoccupIy any of the second ten con
tacts in the bank the thousands digit will ‘be 2. 50 tacts'of switch P03 attached to the second 2,500
line group.
Similarly, the hundreds digit can be determined
From the foregoing description it will be seen
in, accordance with the particular contact in'the
‘that the arrangements according to the inven
bank on which the PF wipers are situated. In the
‘tion, whereby local fee calls are adapted to be
present case-these wipers will be positioned .ona
contact I3 so that the thousandsdigit determin 65 aggregated intobulk .units which are stored prior
‘to'collection,_poss.ess the advantage that a sub
ing wiper PF5 will signal a thousands digitt2 to
the puncher mechanism solenoids and the hun
scriber can continue with the accumulation of a .
second "bulk unit before the .?rst stored unit has
dreds digit determining wiper PFB will signal a
been registered by the exchange punching mech
hundreds ‘digit 3. As regards‘the bracketed nu
.merals associated with these banks PF5 andPFS, 60 anism, it ‘being only necessary to ensure that be
any explanation will be given later.
fore the second block has been completed the
effect of the storage of the ?rst block has been
In a similar manner the tens and units digits
can :be obtained :from the banks of the sub
scriber’s marking uniselector S. For signalling
There is no .di?iculty therefore in ensuring that
tens and units digits '1 and 1 .respectively switch 65 however fast callsare set up by a subscriber, all
S will have its wipers positioned as shown on con
tact l and relay KB will be 'unoperated so that
the puncher control switch wiper P03 on reach
ing contact 5 will extend an earth over resting
armature M14 and wiper Sil. .in position 1 .to ener 70
gise the solenoid I for the .tens digit, while when
wiper P03 .reaches position 16fit will extend an
earth. over wiper S5 in position .1 :to- energise the
:solenOid I again .for the units digit. ‘ In case the
his effective .calls will be recorded even if other
‘subscribers should be completing their blocks of
‘calls atthesametime and requiring the service of
the identi?cation equipment and of the punch
ing mechanism..
In thecase ‘where there is more than one ‘unit
awaiting collection .and registration then if all
the meters concerned are in the same 2,500-line
group the (switches SF and ,PF'in the associated
subscriber had been in 'thegsecond ?fty of the 76 number "register. "equipment. will position them
$2,404,466 7
selves on the ?rst meter marking to be encoun- I
tered. rI‘he bulk unit stored thereon will then be
' collected and. registered after which,v since one ,
~in'acle’of the invention to avoid the use of separate
or more relays CR will still 'be operated, the
switches will hunt again for a new position and
meter racks by arranging to mount the separate
'meter'mecha'nismsvon the associated linei?nder
I 'the bulk unit stored in a second neon tube will,
“be registered, and so on. If the meters concerned
1' are in different 2,500 line-‘groups thentheorder
3 in which the bulk units are collected will be de
f pendent on the order in~which the associated
} ‘groups appear on the banks of the puncher con-‘
12 '7
'a conveniently mounted on the alarm. equipment
rack.)v In the case, of new e'xchangesuse canglbe
trol switch PC._
- ‘
orv line switch racks so that the-exchange cabling
' hitherto required will .be‘avoided. ‘In this case‘as
is brie?y shown in'the inset Fig, 1A, the neon
tube and associated resistance per subscriberwill
be mounted on the ?nal selector rack and a‘single
lead from each meter’ contact will ‘be extended
via a cable and the‘IQ DIF. tothe associated neon
tube. ‘By this arrangement. thereforeliin which
Although in the arrangement described a
1 puncher mechanism is assumed to be provided ' the meter mechanisms are mountedon the .local
1 per exchange,’ since its holding time is very small, ’
side of the I. D. F. as distinct, from the multiple .
* "of the order of two'seconds, it may prove worth- {
1 while to arrange for one suchmechanism to serve ;
side as in thegeneral case hitherto, a'saving in 7
‘ ._ a number of exchanges in an area. ' Arrangements
‘ would of course have to’ be made to ensure that n
wire per meter is required.
the puncher mechanism: could be associated with 22,0
one exchange only at any one time, and this, could
beeffected by connecting the puncher to the wip
j ers of a ?nder switch, the ‘banks of which would
connect with a number of exchanges. ,When any ,
number'registering mechanism wishedto extend '
particulars to the common punching mechanism
the ?nder switch would'be caused to associate‘v
itself with? the particular exchange in question
and particulars could then be extended forward,
exchange cable is effected since ,only'onecable
The method of identi?cation describediis not
essential as any known method of identi?cation ~
may be employed, for instance, the method ac
cording to which potentials areiplaced ondiffer- >
ent lines‘ at different instants in acycle as de-,
scribed in the applications of R. Taylor and G. T.
Baker, Serial Nos. 321,783 and 380,226 ?led March
1, 1940 and February 24, 1941.
» ‘It will be appreciated that it is'desired to cover
the invention in its broadest aspects’ and that
arrangements other than'those speci?cally de
‘ possibly in code so as to reduce the number of 30 scribed and illustrated are intended to fall within
conductors between the 1various exchanges" and‘v
the common point, after which the ‘puncher would»
be freed to deal withcdetails-'fromiother'exchange1
the scope of the appended claims.
It will be understood that the principal feature
of the invention is directed to ‘recording the
charge against a subscriber in?bulk instead of’
registering equipments;
1 In the above connection the puncher mechaa 3.5 individually and preferably in block units each
equivalent to a charge'of a predetermined num
I *nism- might be locatedv for instance in'the 'main
1 , exchange ‘of an area and’ tickets could be trans
l "ferreddaily' to the accounts branch;'alternatively,
—the7puncher’mechanism could'be located in the
'accounts'branchfin'which case the exchange 40
staff would not 'be concerned‘ in"_anyf way vwith
ber of unit fee calls instead of to'registration on
a subscriber’s individual meter vor to the record- '
ing of each individual call;
It is not essential to the invention that the
recording should bedone in such a Way that the I
anism will be preferably fed’ihto'an'automatic
ticketslcan be automatically sortedras of course
the sorting could be done'manually; similarly-it
is not essential that the recording should be done
compartment per subscriber‘; 'When'it is desired
to-make upa'subscriber’s account the relevant
and the necessary information noti?ed to her for
instanceby a call indicator to enable her to make
registration; ‘
' ‘ ~ The tickets‘ delivered from the punching mech
sorter and then arranged in trays containing a ‘~ Cl automatically as an attendant could-be signalled ‘
tickets could thenbe ' counted, multiplied by the
out the ticket manually.
> ~ '-
It will also be understood that the method of
‘appropriate 'bulkunit'charge, and recorded on
the account either manually’ or by automatic iii) registering’ the block unit need not necessarily
consist of a counting arrangement as in the usual
accounting machines.
’ Ti ‘
subscriber’s meter (but may'equally well consist
Since~"incompleted bulk-‘units " are not regis
of any form of, integrating arrangement such as
, 'tered they will ‘be automatically transferred to
the next‘ account.
' " '
- * Considering‘now‘ the mounting‘ of '7 the‘equip; ‘
'ment and the exchange cabling required there
for, the general case of ‘exchanges of the step-‘by;
Lstep‘type will ‘be considered." 'In'the' case'of ex
"isting exchanges the meter mechanisms‘ will be‘
'mounted' in the ' usual" manner‘ on' meter racks
and willconnect with the various subscribers’ line
3 circuits over cables which extend thereto via the
intermediate distribution frame 7 I. D." F. The‘
fneontub'erand associated resistance provided per
subscriber may be mounted on the meter racks
iin which case the meter contactsmay be ‘wired
directly thereto 'or'alternatively the neon tubev ‘
anclj associated resistance might' be mounted on
the ?nal selector racks in-lwhich case a single lead
an electric iwattehour, or ampere hour meter.
What we claim as new and desire to secure by -
Letters Patent is;
- ‘v
1. In a telephone or like system ‘having sub
scribers’ linesland. equipment for extending ‘calls
from said lines, apparatus common to said sub
scribersz lines, means for associating said 'appa-V
ratus with any one ofv said lines after-a plurality
of calls have been extended from that line, and.
means in said apparatus operated responsive to
said association of theapparatus with said line
,for registering all’ of said‘ calls.
2; In a telephone or like system having a sub
scriber’s/ line and means for'making calls there- _
over, means for automatically.-connecting‘with
said line at intervals and,v upon each suchcon
from each meter contact will extendjvia a cable‘ 1:, ,nection,vregi'stering .allcalls madejover‘the line '
~to ‘theas'socia'ted‘neon tube, The: subscriber’sj
1 ~ ?nder switch SF and ‘associated/relay and "resist.
ance ~ will preferably be mounted on» the ' ?nal
selector rack‘and the remainder of the equipment
l ~Whi€h ‘operates, 9111," a morellcommon ‘basis-will be 7'
duringthepreceding intervalc'
3; 'In'a telephone or, like system having a sub
scriber’s line and means .for ,making calls“ from
said line, a registernormally dissociated from said ‘
line, means for associating saidvre'gister with said
line periodicallyand, upon each such-association,
operating said register in accordance with the
fee“ chargeable for‘all calls made from said line
since the last such association of said register
with said line.
‘a predetermined total, and a common register in
said apparatus operated, responsiveito said sei
zure, in'accordance with the registration of said
register individual-to-said‘one line.
v1‘1. In a telephone or like-systemhaving a sub-,
scriber’s line and 'means'for including-said’ line
‘ 4. In a telephone or like system having a vsub-4
scriber’s line eXten-dingto an exchangeand equip
in different I telephone connections at - di?erent
ment for making calls from said line, means at‘
times,»each~such connection having an arbitrary
said’ exchange governed-by one such call from
value assigned to it, means controlled by each
said line for registering that call and at ‘least 10 connection for registering/the valueassignedlito
one call made previously from said line.
'5; In a telephone or like system, a- plurality of
that connection, a recorder, and means controlled ,
subscribers’ lines, means for registering'individ
ually-each call made frem each-of ‘said lines, and
corder-‘responsive" to the aggregate value of con
nections reaching a predetermined i total.
means ‘common to said» lines controlled by said 15
12. In a telephone'or likesystem having a sub—
scriber’s line and means for including said line in ‘
by‘said're'gistering means for operating said‘ re
last means for registering,- inblocks, the calls
made- from each of ‘ said lines, 'each said block
different telephone connections-at di?'erent times,
including-more than one call.
each such connection ‘ having ' an arbitrary wine
~ ,
‘ '6; ' In a telephone or "like system, a subscriber’s
assigned to ‘it, a primary‘ register‘ controlledf‘by
line, means’ controlled oversaid line-for register~ 20 each connection for registering thexvaluel'as
ing callsv made from saidline' on a unit call 'b'a-'
sis, and means controlled by said last means'for
signed " to that “ connection,‘ * a~_'_ secondary "register;
recording calls made from said line on 'a block
call basis.
7.‘In- "a telephone or like system wherein a 25
certain‘ value is assessed to each telephone call,
meanspperatedby said prirnaryregis‘ter for stor
ing’a‘ marking in said secondary‘register responé
sive to the registered aggregatevalue' ofcon‘nec-e
tions reaching a predetermined value,‘ said‘second
ary register thereaften controlled ‘by said stored
marking independently of said primary register
a plurality of subscribers’ lines, a recorder, means
for identifying any one of said lines responsive
to that line making a group of successive tele
to register said aggregate value of connections.
13. In a telephone or like system having a sub
phone calls aggregating a predetermined value, 30 scriber’s line and means for including said line
and means controlled by said last means for op
in different telephone connections ‘at different
erating said recorder variably in accordance with
times, each such connection having an arbitrary
the identity of said one line.
value assigned to it, a primary register controlled
8. In a telephone or like system having a plu
by, each connection for registering the value as
rality of subscribers’ lines and means for includ 35 signed to that connection, a secondary register,
ing each of said lines in di?erent telephone con
means operated by said primary register for store
nections at different times, each such connection
ing a marking in said secondary register respon
having an arbitrary value assigned to it, means
sive to the registered aggregate value of connec
controlled by each telephone connection for reg
tions reaching a predetermined value, said second_
istering, against the subscriber’s line included in 40 ary register thereafter controlled by said stored
marking independently of said primary register
said connection, the value of that connection, ,
and means controlled by said registering means
for identifying the line of any one of said sub
scribers responsive to the aggregate value of con
nections registered against that line reaching a,
predetermined total.
9. In a telephone or like system having a plu
rality of subscribers’ lines and means for includ
ing each of said lines in different telephone con
nections at di?erent times, each such connection
having an arbitrary value assigned to it, a regis
ter individual to each said line operated to reg
ister the value of the different connections in
which that line is included, apparatus common
to said lines, means controlled by the register in
dividual to any one of said linesfor seizing said
apparatus responsive to the aggregate value of
connections registered by that register reaching
a predetermined total, and means controlled by
said apparatus responsive to said seizure for re
cording the identity of said one line and the
aggregate value of connections registered by the
to register said aggregate value of connections,
and means operated automatically by said sec
ondary register after it has registered said aggre
gate value of connections for causing said storing
means to efface said marking.
14. In a telephone or like system having a sub
scriber’s line and means for including said line in
different telephone connections at different times,
each such connection having an arbitrary value
assigned to it,',a primary register controlled by
each connection for registering the value assigned
to that connection, a normally non-conductive
neon tube, means operated by said register to
strike said tube responsive to the registered aggre
gate value of connections reaching a predeter
inined value, a secondary register controlled by
said tube, said secondary register operated in ac—
cordance with the operation of said primary reg
60 ister responsive to said striking of said tube.
15. In a telephone or like system having a sub
scriber’s line and means for including said line
in diiferent telephone’ connections at different
register individual to said one line.
10. In a telephone or like system having a plu
times, each such connection having an arbitrary
rality of subscribers’ lines and means for includ 65 value assigned to it, a primary register controlled
il'ig each of said lines in different telephone con
by each connection for registering the value as
nections at different times, each such connection
signed to that connection, ‘a normally non-con
having an arbitrary value assigned to it, a regis
ductive neon tube, means operated by said reg
ter individual to each said line operated to reg_
, ister to strike said tube responsive to the regis
ister the value of the different connections in 70 tered aggregate value of connections reaching a
which that line is included, apparatus common
predetermined value, a secondary register said
to said lines, means controlled by the register in
‘ secondary register operated in accordance with
dividual to any one of said lines for seizing said
the operation of said primary register responsive
apparatus responsive to the aggregate value of
to said striking of said tube, and means ‘auto
connections registered by that register reaching 76 matically controlled by said secondary register
2,494,456 I
V after its operation for again rendering said neon
‘ tube non-conductive.
1 16. In a telephone or like system having a sub:
3 s'criber’s line and means for'including said line‘
indifferent telephone connections at =di?erent
§ times, each such connection having an arbitrary
‘ value assigned to’ it, and means controlled'by'the
1 last of a plurality of telephone connections'in
eluding said line for registering the aggregate
value of said connections.v
17. In a telephone or like system; subscribers’
3 lines, means individual‘to each of said lines oper-l "
register associated with said line equipment and
operated on successivecalls from said line to ac
cumulate a registration indicative of the total
charge for said calls, and means controlled by said
register for producing a circuit change in said
line equipment responsive to the accumulationof
a registration indicative of a predetermined total
20." In a telephone or like system having a sub
scriber’s line and equipment for extending calls
therefrom, each call including a telephonic path,
another, path independent of said telephonic
path, means fort-registering said calls on a unit
ated in accordance with the fee chargeable to
j the subscriber for his use of that line, apparatus
1 common to said lines,fand means controlled by
.1 I said ?rst'qneans for automatically associating said
call basis, and means controlled by said‘ last
means over saidother path for recording said
‘ apparatus individually with any of said lines re
I 21. Ina telephone system having subscribers’
; sponsivezto the accumulation of a predetermined
linesand equipment for making calls from, said
lines,_ means common to said lines controlledby
the making of a’ call from any particular one of
said lines'for registering'another call made'pre
3 total fee chargeable for the use of that line. .
,18'. vA'system'as claimed in claim 17, wherein
3 said predetermined total fee,gre'spon'sive to the ac
cumulationvof which saidlucommon apparatus is
calls on a block call basis.
viously from said particular line.
associated with a subscriber's line! di?’ers for'dif
‘i \19. ‘In a telephone or like system, a subscriber’s 25
line’ having individual line equipment, an adding
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