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Патент USA US3087029

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April 23, 1963
A. H. FAULKNER
3,087,019
TERMINAL PER STATION IDENTIFICATION CIRCUIT
Filed March 30. 1960
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United States Patent 0 " ICC
1
3,087,019
TERMINAL PER STATION IDENTIFICATION
CIRCUIT
Alfred H. Faulkner, Redondo Beach, Calif, assignor to
Automatic Electric Laboratories, Inc., Northlake, IlL,
a corporation of Delaware
Filed Mar. 30, 1960, Ser. No. 18,721
15 Claims. (Cl. 179-17)
3,087,019
Patented .Apr. 23,- 1963 .
2
line is marked by a +80 volt potential over the “C”
lead and the other side of only one of these lamps is
connected to a +50 volt potential in accordance with the
party identi?cation derived by the ticketer. The selected
lamp strikes and operates the associated relay which
marks the appropriate leads.
Accordingly, it is an object of the present invention
to provide in a telephone system of the type noted an
improved line detector which is operated substantially
The present system relates to automatic toll ticket 10 instantaneously to identify a calling station directory
ing telephone systems and more particularly to line and
number in response to the application of an identifying
party detecting apparatus. Speci?cally, the present in
potential impressed upon the calling line.
vention relates to line and party detecting apparatus of
It is an ancillary object of this invention to provide a
a type particularly adapted to be incorporated in an
detector that can service exchanges arranged for terminal
automatic recording telephone system of the character 15 and frequency per station service at a lower cost.
disclosed in the co-pending application of J. E. Ostline
It is a feature of this invention to provide an arrange
and J. W. Taugner, Serial No. 650,508, ?led April 3,
ment for identifying the calling party on a party line by
1957, now Patent No. 3,046,342.
alternatively rendering conductive a ?rst and then a sec
In an automatic toll ticketing telephone system the de
ond gas tube individual to that party station.
tector is that unit of equipment which automatically de
‘It is a further feature of the invention to provide a
tects the directory number of a subscriber station, when
detector comprising only a pair of gas ?lled discharge
that station initiates a toll call. This number becomes
devices of the two element type individual to each station
part of a call record which is automatically recorded at
of each line of the telephone system and a plurality of
the termination of each completed toll call. Earlier type
settable registers which are controlled in response to the
detectors in present use, arranged to detect individual
conductivity of any one of the devices to register a multi
line station and party line station directory numbers are
limited in that, though they are capable of detecting party
digit designation corresponding to the directory number
of the identi?ed calling station.
line stations arranged for terminal per station service,
A further feature of the invention vis to provide, in
these station terminals require a relay and tube individual
an automatic telephone system including party lines which
to each station terminal. Their terminal per station 30 are arranged on a terminal per station and frequency
method of providing party station service in automatic
per terminal basis, an improved detector provided with
exchanges is well-known and widely used. It is especially
a pair of gas ?lled discharge devices for each substation
adapted to maintain ef?cient distribution of connector
on each of the party lines of the system and which are
traf?c in an exchange and to be able to economically
operated incident to the extension of the connection
maintain existing directory listings when party service 35 from the given station on a given party line to render
subscribers move within an exchange area.
The termi
effective only the gas ?lled discharge devices individual to
nal per station party service plan with frequency-per
that station thereby to identify only the given station on
terminal ringing is now rapidly coming to the fore for
the given party line as a calling station.
new exchange installations. This party station service
Another feature of ‘this circuit is the use of a neon
by means of the frequency per terminal method permits 40 tube “gate” to provide an operation equivalent to that
‘each terminal number to be treated individually because
performed ‘by the relay and neon lamp at present.
any terminal number in an exchange may be associated
Still another feature of this circuit is that all four
with any party or frequency group. Under this method
digits are marked directly from a gate output.
the signi?cance of a party hundred terminal group in a
Further objects and features of the invention pertain
detection process is absent and facilities must be pro 45 to the particular arrangement of the circuit elements of
vided so that any individual terminal may be associated
the system whereby the above outlined objects and addi
with or jumpered to any party or frequency group.
tional operating features are attained. The invention
In the disclosure of Patent No. 2,773,127, issued to
both as to its organization and method of operation
I. V. Coleman on December 4, 1956, only one of the
together with further objects and advantages thereof will
terminals of a party line appear in a particular hundred 50 be best understood by reference to the following speci?ca
group of subscriber terminals. This permits use of a
tion taken in connection with the accompanying drawing.
simple line identi?cation scheme wherein a +80 volt
An automatic toll ticketing telephone system serves a
potential is applied to one side of all the neon lamps
large metropolitan area and adjacent suburban areas
individual to a terminal but common to a line, and a
which are divided into a number of o?ices, each of which
—50 volt potential is applied to the other side of only 55 includes one or more exchanges. Each exchange in each
the lamp corresponding to the particular terminal being
of?ce comprises a ten thousand terminal unit although
identi?ed. The -—50 volt potential is applied through
it may not be initially installed to ‘serve its ultimate ca
a sensitive relay common to the hundreds group which
pacity. Each exchange terminates subscribers’ lines con
includes the selected terminal. ‘Operation of the sensi
tive relay operates slave relays to switch the “C” or 60 nected to subscriber stations that are identi?ed by four
normal leads of all me hundred lines to a common multi
numerical digits.
Consequently, any subscriber station
ple to extend the +80 volt potential marking from the
“C” lead and also marks the appropriate “thousandths”
in any exchange in any national toll area may be identi
?ed by the usual directory number comprising a code por
316, was devised. This uses a relay and neon lamp per
subscriber terminal. One side of all neon lamps on a
sequently each of the stations on each of the party lines
tion including three digits representing respectively the
and “hundredths” leads of the common multiple. How
ever, this arrangement is not applicable when the sys 65 ?rst two letters of the o?ice name and a digit representing
the number of the exchange in the o?ice and a numerical
tem is arranged to permit any party to be given any ter
portion including four digits identifying a terminal of a
minal number without limitation. To provide identi?ca
tion in such a generalized case the system disclosed in
particular station. It is to be noted that the directory
the co-pending application of J. E. Ostline, Serial No.
numbers of the party subscribers substation require no
625,833, ?led December 3, 1956, now ‘Patent No. 3,024, 70 sutlix digit, in view of the fact that all of the party lines
are arranged on a terminal per station basis and con
3,087,019
3
is provided with an individual four digit number identify
ing the particular terminal of the party station.
switch-hook spring set, contacts of the dial, the negative
(—) line conductor, contact 1CO1 of relay 1C0, the
winding of relay 1L to battery, operating relay ‘1L. Re
General Arrangement of the Telephone System
The telephone exchange equipment illustrated com
prises automatic switching apparatus serving 10,000 ter
lay llL at make contact 1L1 connects ground to the CN
lead. Two additional circuits are closed -by the operation
of relay 1L, that is, at contacts 1L2 and 1L3. Contact
1L3 connects ground to the distributor 1D1, of the well
minals, one of the terminals terminating the line of the
known type. The distributor operates to set in motion a
regular subscriber substation RS-l and ten of the ter
line ?nder 130 to search for the calling line. The line
minals terminating the line of the ten party subscriber
substations PS-l, and PS-Z to P840. The switching 10 ?nder 130 performs a vertical movement of its shaft and
wipers, followed by a horizontal movement of the wipers
equipment comprises a number of line circuits individual
and as soon as the wiper of the ?nder makes contact with
ly associated with the subscriber lines terminating in the
the lead lLC, the ?nder stops, relay 1C0, in the line cir
exchange. For example, the line circuit 110 terminates
cuit is operated through this wiper contact, from ground
the line of the regular subscriber substation RS.~1 and
in the ?nder (not shown), lead ILC, contact 1L2 (of
the line circuit 120 comprised of relays 1L and v1C0
relay 1L which operated previously) winding of relay
terminates the line of the party line subscriber substations
PS-l to P840. The subscribers are rendered free auto
matic local service within their own exchange and the ex
lCO to battery, operating relay 1C0. It should be noted
that a second circuit to the winding of relay 1C0 is
closed at contact 1CO'3 which completes a holding cir
changes of their metropolitan area but are automatically
ticketed for the toll charges to all exchanges outside their 20 cuit for relay 100. This is required because the operating
circuit of relay 100 will be opened at contact 1L2 when
metropolitan area.
relay 1L restores, following the operation of relay 1C0.
The switching equipment of the exchange also includes
It should be noted here that, at the moment the ?nder
a group of ?nder switches, including the ?nder switch
wiper stopped on lead 1LC, as explained above, the other
130 which has access to the line circuits 110 and 120.
Each of the ?nders is individually associated with a pri 25 wipers also made contact with the two leads (1+) and
(—) respectively, thus completing the calling subscriber’s
mary selector, such as the primary selector 140. The
line
circuit to the ?rst selector, represented ‘by the wipers.
primary selectors have access through their banks to the
The above noted switching apparatus, including the line
local switch train including the second selectors and con
circuit, the distributor 1D1, the line ?nder 130 and the
nectors etc. not shown, and for toll calls to the ticketer
150, part of which is shown on the drawing and its as 30 ?rst selector 140 may be of conventional construction and
arrangement and may be, for example, of the type dis
sociated equipment which is not shown. The various
closed in Patent No. 2,289,896, and in Patent No. 1,849,
selectors and connectors are of conventional construction
694.
and operation.
The line ?nder is permanently connected directly to
In considering the detector shown it should be noted
that it is connected to each of the line equipment termi 35 a ?rst selector. At the moment of seizure of the calling
subscriber’s line by the line ?nder and the extension of
nals of each of the subscriber lines terminating in the ex
the subscriber’s line circuit to the selector, a well-known
change, and that it is associated with each of a plurality
action takes place, the negative line (—) is connected to
of ticketers in an exchange, such as the ticketer 150
battery through one winding of a selector line relay (not
through a detector assigner which is not shown.
Each subscriber substation is provided with the usual 40 shown) and the positive line (2+) is connected through
another winding of the same line relay to ground. The
substation apparatus, including in the telephone instru
selector line relay operates a second or release relay (not
ment, 8. ringer and a calling device or dial. The calling
shown) to furnish ground back over the lead ~1LC.
devices disposed at the regular subscriber substations such
Ground from the selector 140 over the ILC lead con
as the substation RS-l are of conventional construction
and arrangement. The calling devices disposed at the 45 stitutes the holding means for all switches in the train
up to the selector 140.
party subscriber substations, such as PS-l, PS-2, etc. are
The ?rst digit “9” can now be dialed, the selector 140
of special construction and arrangement as disclosed in
(details not shown) will respond and lift its wipers to the
the patent application of John E. Ostline, now Patent No.
2,822,424, issued February 4, 1958. The special dials
ninth level, automatic rotation will then take place and
pulse springs after the pulse corresponding to the party’s
is the holding ground for the complete train of switches.
other stations on this ten-party line are shown as stations
justment the ground pulse is applied while the loop is
of the type ‘disclosed in the aforesaid patent, in addition 50 the Wipers will stop on the ?rst idle contact group of
level nine, which will, in this instance, be a set of con
to the set of impulse springs, are provided with a set of
tacts representing ticketer 150‘. An action typical of step
cam springs which are utilized to identify the position of
by-step circuitry takes place, the line relay 14AA of the
the calling subscriber substation on the associated party
ticketer 150 is operated, a second or release relay 13BA
line. The cam springs serve to transmit a ground pulse
from the calling device during the closed period of the im 55 operates in turn to place ground on the “CL” lead which
As mentioned earlier, subscribers on party lines require
position on the line.
extra party-identity mechanism and contacts in the dial.
The drawing shows a terminal per station identi?ca
Whenever “0" (zero) is dialed, this mechanism sends one
tion circiut in an automatic exchange. Referring now to
the drawing, it will be assumed that station PS-Z desires 60 ground pulse. The location of this pulse varies from
party to party on the line. The ground pulse is normally
to make a call, and the ensuing operations will be de
applied to the + line ‘conductor. vIn a dial in good ad
scribed. Station PS-Z is one of ten stations. Two of the
PS—-10 and PS-l, connected to a two conductor circuit,
the (1+) positive and (—) negative conductors, extending
to the automatic exchange. It will be noted that the sta
tions are equipped with a dial of the type disclosed in the
Patent Number 2,822,424, well-known to the art and the
telephone is connected to the telephone line conductors in
a well-known manner.
When the receiver is removed at station PS-Z or the
handset of a monophone type telephone is lifted from its
cradle, a circuit is closed at the hookswitch (not shown)
closed and has no effect on normal loop-pulsed switching
65 selections.
At the time the caller reaches the ticketer, and while
the caller dials the access-code '?nal ‘digit “0” (zero) into
the ticketer, the special circuit shown in FIG. 1 is utilized.
During this spotter-dial checking interval, the dial loop
70 pulses interrupt a ‘circuit which contains not the regular
central-office battery but an extra spotting-interval bat
tery and polarized relay 1‘0PA. With the party-identity
contacts open as shown, polarized relay ,10PA does not
operate.
75
ground at contacts 1002, the positive line conductor. the
of the telephone, this circuit can be traced as follows:
3,087,019
While the caller dials “0” (zero) into the ticketer, relay
14AA follows the dial pulses, and sends pulses simul
taneously into rotary switch 11PS (party switch) and also
to other portions of the circuit not shown.
At the end of the loop pulse coinciding with the caller’s
party-number in this assumed condition the second pulse,
the dial pulse-springs re-close, party switch llPS steps
to the position coinciding with the caller’s party-number,
and the spotter-dial extra cam mechanism closes the dial’s
party-identity contacts 1P2. The current ?ow through
polarized relay 10PA is now in such a direction that
The “CL” lead is normally at either ground or —50
volts. In either case this results in 25 volts across both
neon lamps. If the party terminal was normally con
nected to —65 volts, the shunt INEl lamp would not
strike but might hold on 65 volts if ?red by a transient,
hence the —25 volt potential normally applied provides
maximum assurance against undesired lamp operations.
When a ticketer, or its equivalent, seizes the identi?ca
tion circuit, it operates one of the relays P1 to P0 to
identify the desired party and extends +80 volts over
the “CL” lead to the line circuit. A low frequency 20
or 60 cycles, alternating voltage of about 20 v. R.M.S. is
applied to the other terminal by the party relay P2 to
polarized relay 10PA operates, and operates relay ISPB
(pulse blocking) lwhich locks. Relay I‘SPB opens the
pulsing path toward party switch MP3, and grounds the
facilitate ampli?cation of the gate output. As previously
party-switch wiper, thus grounding in relay group P1-P10 15 assumed relay P2 is operated, it connects the alternating
the party-numbered lead corresponding to the calling
current to lead P2 and operates a common relay 10 which
station’s party position.
connects —-65 v. to leads P1 and P3 to P0. In the case
Should the caller be an individual-line subscriber as
of the terminal circuits jumpered to leads P1 and P3 to
RS-l, his dial has no party-identity mechanism, and al~
P0 the shunt lamps have 40 volts more applied across
though party switch illPS will receive all 10 loop pulses, 20 their terminals than the associated series (right lower)
relay -15PB remains unoperated, and so does not ground
lamps, hence the shunt lamps strike and limit the voltage
party No. 10 lead P10 but individual-line lea-d relay P0
applied to the series lamps to about 25 ‘volts, thus pre
through other control circuits shown only by the dotted
venting their operation. In the case of the terminal cir
lead.
cuit jumpered to the selected lead P2, which is the circuit
A moment after polarized relay ltlPA operates, the 25 shown, the series lamp INE2 conducts alternatively with
caller’s dial opens its party-identity springs 1P2, polarized
lamp INEI. In this case when the series lamp strikes
relay 10PA restores, and (except in the case of party No.
it extends the marking on the “CL” lead to the four
10) the dial pulsing springs interrupt the loop again.
commons connected to its output.
A current of about
Relay 14-AA follows the remainder of the 10 loop pulses.
100 microamperes ?ows through the series lamp, provid
But, with relay ISPB locked, party switch llPS remains 30 ing a signal of about 25 microamperes to each of the
where it stopped. ,
.
four commons. This signal is modulated from about
A moment after the caller has dialed “0” properly into
zero to twice its average value by the alternating voltage
theticketer, relay 1‘4AA comes to rest, a slow-release
signal, thus providing an alternating voltage of 5 to 10
relay (not shown) restores, and operates circuits not here
millivolts at the inputs to the ampli?ers connected to each
disclosed which remove polarized relay ltlPA and the
ofithie common points corresponding to the selected ter
spotter battery, and substitute regular central-o?ice bat
mma .
tery. Relay v14AA will follow subsequent dial pulses to
The 5 to 10 millivolt alternating voltage applied to
repeat area-and/or office-code digits to the associated
the input of the units digit (1 digit) ampli?er is raised
‘circuits, and to permit all called-number digits to be
about 40 db by the ?rst transistor 2T and is coupled
marked into the ticketer for storage.
through the transformer ZTR in its collector circuit to
Upon completion of the pulsing of digit “0” into the
the base input of the second transistor ZTRW through
ticketer, relay KD operates (via a circuit not shown) to
rectifying diodes 1D, 2D, 3D and 4D. The second tran
replace ground with a +80 volts upon the CL lead back
sistor ZTRW functions as a power detector to operate
through the selector, line?nder and calling stations line
the relay ZRW in its collector circuit on the recti?ed and
equipment to all of the neon lamps associated with that
ampli?ed signal. A by-pass capacitor 2C smooths the out
,line equipment.
put and increases the detection efficiency. The relay op
Relay ‘15PB, upon operating, also grounded the Wiper
erates and grounds the “W”-lead output to operate the
of party switch .11PS which is resting upon a contact num—
corresponding register relay in the ticketer 150, or its
bered to correspond to the calling party’s number. A
equivalent. Obviously the output can be converted to
circuit is thus completed from ground at contacts 15PB3 50 binary _or codel codes in the identi?cation circuit, if de
wiper of switch llPS to relay P2, as assumed earlier
sired, by conventional circuitry.
.
that station PS2, upon operating, completes a path from
While only one embodiment of the invention has been
ground at its contacts to common relay 1C and at con
disclosed, itwill be understood that various modi?ca
tacts P22 connects on alternating current to all of the 55 tions may be made therein which are within the true
neon lamps corresponding to party position number two.
The group or" relays Pl-P10 and Pt} mark the party
line commons, in accordance with the party identi?cation
derived from the SATT dial pulse. In the present circuit
alternating current is applied to the selected party lead
and the rest are connected to —25 volts from the back
contacts of the unoperated Pl~P0 relays. The —25 volt
potential is not essential, since no current other than that
required to charge the shunt capacity of the wiring flows
over the party leads to which this potential is applied,
but it is provided to eliminate any uncertainty.
Each terminal is provided with a 2.20 K ohm resistor
such as R1, extending from the “CL” lead to the junction
of the two type NE-2 neon lamps such as INEI and
INE2. The other terminal of one of these lamps is con
nected to a terminal of the party line commons P-1 to
P-0. The other terminal of the second neon lamp is
connected to the junction of four one-megohm resistors.
‘Each of these resistors marks one digit of the terminal
number in a 10,000‘ terminal of?ce.
spirit and scope of the invention.
What is claimed is:
.
_
‘
1. In a telephone system, a subscriber station identi
?ed by a multi-digit designation, a ?rst and a second multi~
electrode gas ?lled tube individual to said station, a sta
tion marking conductor connected to one electrode of
said ?rst tube, a line marking conductor connected to
one of said electrodes of each of said tubes, :a plurality
of resistors individual to said station connected to another
65 of said electrodes of said second tube, a plurality of ‘cod
ing ampli?ers, one terminal of each of said plurality of
resistors connected to one of each of said plurality of
coding ampli?ers, a plural digit register, switching means
controlled in response to a call from said station for
connecting said' station to said register, a source of po
tential, means in said register operated in response to
said connection for connecting said source of potential to
said line marking conductor, control means selectively
operated from said station for completing ‘a circuit in
75 cluding said source of potential and said station marking
3,087,019
'
7
conductor and said ?rst tube in order to render said ?rst
tube conductive, said second tube render-ed conductive
in response to the conductivity of said ?rst tube, and
means including said plurality of coding ampli?ers con
trolled by the operation of said second tube for operating
said plural digit register to simultaneously register said
multi-digit station designation.
tiers comprising ten ampli?er units, each ampli?er unit
in said group corresponding to a number from 1 through
9 and O, a plurality of groups of coding detectors, each
group of coding detectors comprising ?ve detector units,
each group of coding detectors associated with each
group of ampli?ers, each detector unit in said group of
coding detectors corresponding to an element of a two
out-of-?ve element self-checking combinational code, one
each of said plurality of resistors connected to one of
designation, a ?rst and a second two element discharge l0 said ampli?er units in each said group of ampli?ers, each
of said resistors connected to an ampli?er corresponding
device individual to said line, a station marking conduc
to each of said digits of said plural digit designation of
tor connected to one of said elements of said ?rst device,
said subscriber station, :a plural digit register, switching
2. In a telephone system, a plurality of subscriber
lines, a calling subscriber line identi?ed by a multi-digit
a line marking conductor connected to one of said ele
means controlled in response to a call ‘from said station
ments of each of said devices, a plurality of resistors
individual to said line connected to the other of said 15 to connect said station to said register, a source of po
t-ential, relay means in said register operated in response
elements of said second device, a plurality of coding
to said connection to connect said source of potential to
ampli?ers, one terminal of each of said plurality of re
said line marking conductor, control means selectively
sistors connected to one of each of said plurality of cod
operated from said register to complete a circuit includ
ing ampli?ers, a plural digit register, switching means
ing said source of potential and said line marking con
controlled in response to a call from said line for con 20
ductor
and said ?rst device to render said ?rst device
necting said station to said register, a source of potential,
conductive, said second device rendered conductive in
means in said register operated in response to said con
response to the conductivity of said ?rst device, and means
nection for connecting said source of potential to said
including said ampli?ers connected to said plurality of
line marking conductor, control means selectively op
resistors controlled by the operation of said second de
25
erated from said line for completing a circuit including
vice to operate said ampli?ers to operate said coding de
said source of potential and said station marking con
tectors, coding relay means in said coding detectors op~
ductor and said ?rst device in order to render said ?rst
erated upon operation of said detector to operate said
device conductive said second device rendered conductive
plural digit register to simultaneously register said multi
in response to the conductivity of said ?rst device, and
means including said plurality of coding ampli?ers con 30 digit station designation.
5. In a telephone system, a plurality of subscriber lines,
trolled by the operation of said second device for operat~
a calling one of said subscriber lines, said subscriber lines
ing said plural digit register to simultaneously register said
each identi?ed by a multi-digit designation, a ?rst and
multi-digit line designation.
a second two electrode gas ?lled electronic device indi
3. In’ a toll ticketing telephone system, a party line
subscriber station identi?ed by a multi-digit designation 35 vidual to each of said lines, a station marking conductor
connected to one of said electrodes of said ?rst device,
having a pulsing means, a ?rst ‘and a second two elec
a line marking conductor connected to one of said elec
trode gas ?lled electronic device individual to said sta
trodes of both said ?rst and said second device, a plu
tion, a station marking conductor connected to one of
rality of resistors individual to said line, one terminal of
said electrodes of said ?rst device, a line marking con
ductor connected to one of said electrodes of each of 40 each said resistors connected to the other of said elec
trodes of said second device, the number of said resistors
said devices, a plurality of resistors individual to said sta
corresponding to the number of digits of said plural digit
tion connected to the other of said electrodes of said
designation to be detected, a plurality of groups of ampli
second device, a plurality of coding ampli?ers, one ter
?ers, each group of ampli?ers comprising ten ampli?er
minal of each of said plurality of resistors connected to
units, each ampli?er unit in said group corresponding to
one of each of said plurality of coding ampli?ers, a plural
a number from 1 through 9 and 0, a plurality of groups
digit register, a plurality of station marking conductors
of coding detectors, each group of coding detectors com
terminating in said register, switching means controlled
prising
?ve detector units, each group of coding detectors
in response to a call from said station for connecting said
station to said register, a source of potential, means in 50 associated with each group of ampli?ers, each detector
unit in said group of coding detectors corresponding to
said register operated in response to said connection and
an element of tWo-out-of-?ve element selfchecking com
said subscriber station pulsing means for connecting said
binational code, one each of said plurality of resistors
source of potential to said station marking conductor
connected to one of said ampli?er units in each said
corresponding to said subscriber’s position on said line,
group of ampli?ers, each of said resistors connected to
control means selectively operated from said station for
an
ampli?er corresponding to each of said digits of said
completing 1a circuit including said source of potential
plural digit designation of said subscriber line, a plural
and said line marking conductor and said ?rst device to
digit register, switching means controlled in response to
render said ?rst device conductive, said second device
a call from said calling line to connect said line to said
rendered conductive in response to the conductivity of
register, a source of potential, relay means in said register
said ?rst device, and means including said plurality of
operated in response to said connection to connect said
coding ampli?ers controlled by the conductivity of said
source of potential to said station marking conductor,
second device for operating said plural digit register to
control means selectively operated from said register to
simultaneously register said multi-digit station designa
complete a circuit including said source of potential and
tion.
said line marking conductor and said ?rst device to render
4. In a telephone system, a subscriber station identi?ed
said ?rst device conductive, in order to render said second
by a ,multi-digit designation, a ?rst and a sec-0nd two elec—
device conductive, and means including said ampli?ers
trode gas ?lled electronic device individual to said sta
connected to said plurality of resistors controlled by the
tion, a station marking conductor connected to one of
operation of said second device to operate said ampli?ers
said electrodes of said ?rst device, a line marking con
ductor connected to one of said electrodes of each of 70 to operate said coding detectors, coding relay means in
said coding detectors operated upon operation of said
said devices, a plurality of resistors individual to said sta
detector to operate said plural digit register to simul
tion, one terminal of each said resistors connected to the
taneously register said plural digit line designation.
other of said electrodes of said second device, the num
6. In a toll ticketing telephone system, a 10,000 ter
ber of said resistors corresponding to the number of
minal of?ce, a subscriber station identi?ed by a four-digit
digits of said plural digit designation to be detected, 1a
plurality of groups of ampli?ers, each group of ampli
' designation within said o?‘ice, a ?rst and a second two
3,087,019
10
electrode gas ?lled electronic device individual to said
station, a station marking conductor connected to one
of said electrodes of said ?rst device, a line marking con
ing said second source of potential and said ?rst source
of potential and said ?rst device in order to operate
ductor connected to one of said electrodes of each of
?ers connected to said plurality of resistors con
said devices, tour resistors individual to said station, one
terminal of each said resistors connected to the other
of said electrodes of said second device, four groups of
ampli?ers, each group of ampli?ers comprising ten ampli
said second device, and means including said ampli
trolled ;by the operation of said second device to oper
ate said ampli?ers to operate said coding detectors,
coding relay means in said coding detectors operated
upon operation of said detector to operate said plural
?er units, each ampli?er unit in said group correspond
digit register to simultaneously register all of the digits
ing to .a number from 1 through 9 and 0, four groups 10 of said plural digit station designation.
of coding detectors, each group of coding detectors com
8. A system as claimed in claim 7, where said ?rst
prising ?ve detector units, each group of coding detectors
potential is positive eighty volts.
associated with each group of ampli?ers, each detector
9. A system as claimed in claim 7, where said second
unit in said group of coding detectors corresponding to
potential is an alternating current swinging from a posi
an element of a two-out-of-?ve element self-checking 15 tive ?fteen volts to a negative sixty volts.
combinational code, one each of said plurality of resistors
10. In a toll ticketing telephone system, a 10,000 termi
connected to one of said ampli?er units in each said
nal o?ice, a plurality of subscriber party lines, each said
group of ampli?ers, each of said resistors connected to
party line having a plurality of party subscriber stations
one ampli?er in a group corresponding to one of said
identi?ed by a tour-digit designation Within said o?ice
digits of said four digit designation of said subscriber 20 and each equipped with a pulsing means, a ?rst and a
station, a plural digit register, switching means controlled
second two electrode gas ?lled electronic device individual
in response to a call from said station to connect said
to each of said stations, a station marking conductor
station to said register, a source of potential, relay means
connected to one of said electrodes of said ?rst device
in said register operated in response to said connection
for
each party subscriber, a line marking conductor
to connect said source of potential to said line marking 25 connected to one of said electrodes of each of said de—
conductor, control means selectively operated from said
vices associated With a particular line, a group of four
station to complete a circuit including said source of
resistors individual to said station, one terminal of all
potential and said station marking conductor and said ?rst
of said resistors connected to the other of said electrodes
device in order to render said ?rst device conductive, said
of said second device, said resistors each corresponding
second device rendered conductive in response to the con 30 to one of the digits of said four digit designation to be
ductivity of said ?rst device, and means including said
detected, four groups of ampli?ers, each group of am
ampli?ers connected to said plurality of resistors con~
pli?ers comprising ten ampli?er units, each ampli?er
trolled by the operation of said second device to operate
unit in said group corresponding to a number from 1
said ampli?ers to operate said coding detectors, coding
relay means in said coding detectors operated upon op 35 through 9 and 0, a plurality of groups of coding detectors,
each group of coding detectors comprising ?ve detector
eration of said detector to operate said plural digit reg
units,
each group of coding detectors associated with
ister to simultaneously register said ‘four digit station
each group of ampli?ers, each detector unit in said group
designation.
of coding detectors cor-responding to an element of a
7. In a toll ticketing telephone system, a party line
.two-out-of-?ve element self-checking combinational code,
subscriber station identi?ed by a multi-digit designation
means for connecting one of each of said four resistors
to one of said ampli?er units in each group of ampli?ers,
each of said resistors connected to an ampli?er corre
and having a pulsing means, a ?rst and a second two
electrode gas ?lled electronic device individual to said
station, a station marking conductor connected to one
of said electrodes of said ?rst device, a line marking
sponding to each of said digits of said four-digit desig
conductor connected to one of said electrodes of each 4:5 nation of said subscriber station, a plural digit register,
switching means directively controlled in response to said
pulsing means upon initiation of a call from said station
to connect said station to said register, a ?rst source of
potential, a second source of potential, a third source
of said devices, a plurality of resistors individual to said
station, one terminal of each said resistors connected
to the other of said electrodes of said second device, the
number of said resistors corresponding to the number of
digits of said plural digit designation to be detected, a
plurality of groups of ampli?ers, each group of ampli?ers
comprising ten ampli?er units, each ‘ampli?er unit in said
of potential, a calling- party position marking relay,
means operated by said calling party marking relay to
apply said second potential to said party marking con
ductor, marking means in said register operated in re
sponse to said connection and the further operation of
0, a plurality of groups of coding detectors, each group
said pulsing means to operate said party marking relay,
of coding detectors comprising ?ve detector units, each 55 control
means selectively operated from said register
group of coding detectors associated with each group
to complete a circuit including said second source of
of ampli?ers, each detector unit in said group of coding
potential and said ?rst source of potential and said ?rst
detectors corresponding to an element of a tWo-out-of
device in order to operate said second device, and means
?ve ‘element self-checking combinational code, the other
including
said ampli?ers connected to said plurality of
60
terminal of each of said plurality of resistors connected
resistors controlled by the operation of said second de
to an ampli?er unit in each- said group of ‘ampli?ers cor
vice to operate said ampli?ers to operate said coding de
responding to each of said digits of said plural digit
dectors, coding means in said coding detectors operated
designation of said subscriber station, a plural digit reg
upon operation of said detector to operate said plural
group corresponding to a number from 1 through 9 and
ister, switching means directively controlled in response
digit register to simultaneously register said plural digit
station designation.
to said pulsing means upon initiation of a call from said
station to connect said station to said register, a ?rst
11. In a toll ticketing telephone system, a 10,000 ter
source of potential, a second source of potential, a call
minal o?ice, a plurality of subscriber party lines, each
ing party position marking relay, means operated by
said party line having a plurality of party subscriber sta
said calling party marking relay to apply said second 70 tions identi?ed by a tour-digit designation within said
potential to said party marking conductor, marking means
o?ice and each equipped with a pulsing means, a ?rst and
in said register operated in response to said connection and
a second two electrode gas ?lled electronic device indi
the further operation of said pulsing means to operate
said party marking relay, control means selectively op
erated from said register to complete a circuit includ
75
vidual to each of said stations, a station marking con
ductor connected to one of said electrodes of said ?rst
device for each party line subscriber station, a line mark
8,087,019
11
ing conductor connected to one of said electrodes of each
of said devices associated with a particular line, a group
of four resistors individual .to each said station, one ter
minal of all of said resistors connected to the other of
said electrodes of said'second device, said resistors each
corresponding to one of the digits of said four digit des
ignation to be detected, four groups of ampli?ers, each
12
station, a plural'digit register, switching means direc
tively controlled in response .to said pulsing means upon
initiation of a call from said station to connect said
station to said register, a ?rst source of potential, a sec
ond source of potential, a third source of potential, a
plurality of party position marking relays, make contact
means on each said party position marking relay, said
make contact means operated by said party marking
relay corresponding to said calling party position to apply
ampli?er unit in said group corresponding to a number
from 1 through 9‘ and 0, a plurality of groups of coding 10 said second potential to said party marking conductor,
break contact means on each said party position marking
detectors, each group of coding detectors comprising
relay, said break contact effective on each said unoperated
?ve detector units, each group of coding detectors as
party position marking relay to extend said third source
sociated with each group of ampli?ers, each detector unit
of potential to each said electronic device not associated
in said group of coding detectors corresponding to an
element of a two-out-of-?ve element self-checking com 15 with said calling station, marking means in said register
operated in response to said connection and the further
binational code, means for connecting one of each of
operation of said pulsing means to operate said party
said four resistors to one of said ampli?er units in each
marking relay, control means selectively operated from
said group of ampli?ers, each of said resistors connected
said register to complete a circuit including said second
to an ampli?er corresponding to each of said digits of
said four-digit designation of said subscriber station, a 20 source of potential and said ?rst source of potential
said ?rst device in order to ?re said ?rst device, said
plural digit register, switching means directively con
group of ampli?ers comprising ten ampli?er units, each
trolled in response to said pulsing means upon initiation
of a call from said station to connect said station to said
second device rendered conductive in response to the
response to the ?ring of said ?rst device, and means in
conductor connected to one ‘of said electrodes of said
?ring of said ?rst device, and means including said
ampli?ers connected to said plurality of resistors con
register, a ?rst source of potential, a second source of
potential, a third source of potential, a plurality of party 25 trolled by the operation of said second device to operate
said ampli?ers to operate said coding detectors, coding
position marking relays, make contact means on each
relay means in said coding detectors operated upon op
said party position marking relay, said make contact
eration of said detector to operate said plural digit regis
means operated by said party marking relay correspond
ter to simultaneously register said plural digit station
ing to said calling party position to apply said second
designation.
'
potential to said party marking conductor, marking means
13. In a toll ticketing telephone system, a 10,000 ter
in said register operated in response to said connection
minal o?‘ice, a plurality of subscriber party lines, each
and the further operation of said pulsing means to op
said party line having a plurality of party subscriber
erate said party marking relay, control means selectively
operated from said register to complete a circuit includ 35 stations identi?ed by a four-digit designation within said
office and each equipped with a pulsing means, a ?rst
ing said second source of potential and said ?rst source
and a second two electrode gas ?lled electronic device
of potential and said ?rst device in order to ?re said
individual to each of said stations, at station marking
?rst device, said second device rendered conductive in
cluding said ampli?ers connected to said plurality of 40 ?rst device for each party line subscriber station, a line
marking conductor connected to one of said electrodes
resistors controlled by the operation of said second de
of each of said devices associated with a particular line,
vice to operate said mpli?ers to operate said coding de~
tectors, coding relay means in said coding detectors op
er-ated upon operation of said detector to operate said
plural digit register to simultaneously register said plural
digit station designation.
12. In a toll ticketing telephone system, a 10,000 ter
minal of?ce, a plurality of subscriber party lines, each
said party line having a plurality of party subscriber sta
tions identi?ed by a four-digit designation within said
o?ice and each equipped with a pulsing means, a ?rst and
a second two electrode gas ?lled electronic device indi
vidual to each of said stations, at station marking con
ductor connected to one of said electrodes of said ?rst
device vfor each party line subscriber station, a line mark
ing conductor connected to one of said electrodes of each
of said devices associated with a particular line, a group
of four resistors individual to each said station, one ter
minal of all of said resistors connected to the other of
a group of four resistors individual to each said station,
one terminal of all of said resistors connected to the
45 other of said electrodes of said second device, said re
sistors each corresponding to one of the digits of said
four digit designation to be detected, four groups of
ampli?ers, each group of ampli?ers comprising ten am
pli?ers units, each ampli?er unit in said group corre
sponding to a number from- 1 through 9 and 0, each
said ampli?er including at least a transistor and an out
put transformer, a plurality of groups of coding detec
tors, each group of coding detectors comprising ?ve
detector units, each group of coding detectors associated
with each group of ampli?ers, each detector unit in said
group of coding detectors corresponding to an element
of a two-out-of-?ve element self-checking combinational
code, each said coding detector including at least a tran
sistor and a relay with a make contact assembly, said
said electrodes of said second device, said resistors each 60 relay operatively connected to the collector of said tran
sistor, means for connecting one of each of said four
corresponding to one of the digits of said four digit
resistors to the base of said transistor of one of said
designation to be detected, four groups of ampli?ers,
ampli?er units in each group of ampli?ers, each of said
each group of ampli?ers comprising ten ampli?er units,
resistors connected to the transistor of an ampli?er
each ampli?er unit in said group corresponding to a
number from 1 through 9 and O, a plurality of groups 65 corresponding to each of said digits of said four-digit
designation of said subscriber station, a plural digit reg
of coding detectors, each group of coding detectors com.
ister, switching means directively controlled in response
prising ?ve detector units, each group of coding de
to said pulsing means upon initiation of a call from said
tectors associated with each group of ampli?ers, each
station to connect said station to said register, a ?rst
detector unit in said group of coding detectors corre
sponding to an element of a two-out-of-?ve element self 70 source of potential, a second source of potential, a third
source of potential, a plurality of party position mark
checking combinational code, means for connecting one
ing relays, make contact means on each said party posi
of each of said four resistors to one of said ampli?er
tion marking relay, said make contact means operated
units in said group of ampli?ers, each of said resistors
by said party marking relay corresponding to said call
connected to an ampli?er corresponding to each of said
digits of said ‘four-digit designation of said subscriber 75 ing party position to apply said second potential to said
13
3,087,019
party marking conductor, break contact means on each
said party position marking relay, said break contacts
effective on each said, unoperated party position marking
relay to extend said potential to each said electronic
device not associated with said calling station, marking
means in saidv register operated in response to said con
nection and the further operation of said pulsing means to
operate said party marking relay, control means selec
tively operated from said register to complete a circuit
including said second source of potential and said ?rst
source of“ potential and said ?rst device in order to
?re said ?rst‘ device, said second device rendered con
ductive in response to the ?ring of said ?rst device, and
means including said ampli?ers connected to said plu
rality of resistors controlled by the operation of said
second device to operate said ampli?ers to operate said
,
a
14
_
tion, said potential switching relay operated to remove
said third source of potential from said back contacts and
to apply said fourth source of potential, marking means
in said register operated in response to said connection
and the further operation of said pulsing means to oper
ate said party marking relay, control means selectively
operated from said register to complete a circuit includ
ing said second source of potential and said ?rst ‘source
of potential and said ?rst device in order to operate said
10 ‘second device, and means including said ampli?ers con
nected to said plurality of resistors controlled by the op
eration of said second device to operate said ampli?ers
to operate said coding detectors, coding relay means in
said coding detectors operated upon operation of said
15 detector to operate said plural digit register to simultane
ously register said plural digit station designation.
coding detectors, coding relay means in said coding de
15. In a toll ticketing telephone system, a 10,000 ter
minal o?ice, a plurality of subscriber party lines, each
erate said plural digit register to simultaneously regis
said party line having a plurality of party subscriber sta
ter said plural digit station designation.
20 tions identi?ed by a four-digit designation within said
dectors operated upon operation of said detector to op
14. In a tool ticketing telephone system, a 10,000 ter
minal office, a plurality of subscriber party lines, each
said party line having a plurality of party subscriber sta
tions identi?ed by a four-digit designation within said of
?ce and each equipped with a pulsing means, a ?rst and
a second two electrode gas ?lled electronic device indi
vidual to each of said stations, a station marking con
ductor connected to one of said electrodes of said ?rst
device for each party line subscriber station, a line mark
ing conductor connected to one of said electrodes of each
of said devices associated with a particular line, a group
of four resistors individual to each said station, one ter
minal of all of said resistors connected to the other of
said electrodes of said second device, said resistors each
corresponding to one of the digits of said four digit des
ignation to be detected, four groups of ampli?ers, each
group of ampli?ers comprising ten ampli?er units, each
amplier unit in said group corresponding to a number
from 1 through '9 and ‘0, each said ampli?er including at
ol?ce and each equipped with a pulsing means, a ?rst
and a second multi electrode gas ?lled electronic device
individual to each of said stations, a station marking con
ductor connected to one of said electrodes of said ?rst
device for each party line subscriber station, a line mark
ing conductor connected to one of said electrodes of each
of said devices associated with a particular line, a group
of four resistors individual to each said station, one ter
minal of all of said resistors connected to another of
said electrodes of said second device, said resistors each
corresponding to one of the digits of said four-digit des
ignation to be detected, four groups of ampli?ers, each
group of ampli?ers comprising ten ampli?er units, each
ampli?er unit in said group corresponding to a number
from 1 through 9 and 0, each said ampli?er including
at least a transistor and an output transformer, a plurality
of groups of coding detectors, each group of coding de
tectors comprising ?ve detector units, each group of cod
ing detectors associated with each group of ampli?ers,
least a transistor and an output transformer, a plurality 40 each detector unit in said group of coding detectors cor
responding to an element of a two-out-of-?ve element
of groups of coding detectors, each group of coding de
tectors comprising ?ve detector units, each group of cod
ing detectors associated with each group of ampli?ers,
self-checking combinational code, each said coding de
each detector unit in said group of coding detectors cor
make contact assembly, recti?er means connecting said
tector including at least a transistor and a relay with a
responding to an element of a two-out-of-?ve element 45 transformer to said transistors of said detectors said re
self-checking combinational code, each said coding de
lay operatively connected to the collector of said tran
tector including at least a transistor and a relay with a
sistor, means for connecting one of each of said four re
sistors to the base of said transistor of one of said am
make contact assembly, said relay operatively connected
pli?er units in each said group of ampli?ers, each of said
to the collector of said transistor, means for connecting
one of each of said four resistors to the base of said 50 resistors connected to the transistor of an ampli?er cor~
responding to each of said digits of said four-digit des
transistor of one of said ampli?er units in each said
ignation of said subscriber station, a plural digit register,
group of ampli?ers, each of said resistors connected to
switching means directively controlled in response to said
the transistor of an ampli?er corresponding to each of
pulsing means upon initiation of a call from said station
said digits of said four-digit designation of said sub
scriber station, a plural digit register, switching means di
55 to connect said station to said register, a ?rst source of
rectively controlled in response to said pulsing means
potential, a second source of potential, at third source of
upon initiation of a call from said station to connect said
station to said register, a ?rst source of potential, a sec
ond source of potential, a third source of potential, and
party position marking relays, a potential switching relay,
party position marking relay eifective to complete a cir
by said party marking relay corresponding to said call
potential, and a fourth source of potential, a plurality of
back contacts in said switching relay ?rst make contact
a fourth source of potential, a plurality of party posi 60 means on each said party position marking relay, sec
ond make contact means on each of said party position
tion marking relays, a potential switching relay, ?rst
marking relay effective to complete a circuit to said
make contact means on each said party position mark
switching relay, said ?rst make contact means operated
ing relay, second make contact means on each of said
cuit to said switching relay, said ?rst make contact means 65 ing party position to apply said second potential to said
operated by said party marking relay corresponding to
said calling party position to apply said second potential
party marking conductor, said second make contact
means operated to operate said switching relay, break
to said party marking conductor, said second make con
tact means operated to operate said switching relay, break
contact means on each said party position marking re
lay, said third source of potential normally connected to
contact means on each said party position marking re 70 said break contacts, said break contacts elfective on each
lay, said third source of potential normally connected to
said unoperated party position marking relay to extend
said break contacts, said break contacts e?ective on each
said potential from said potential switching relay to each
said unoperated party position marking relay to extend
said electronic device not associated with said calling sta
said potential from said potential switching relay to each
tion, said potential switching relay operated to remove said
said electronic device not associated with said calling sta 75 third source of potential from said back contacts and to
3,087,019
15
apply said fourth source of potential to said back contacts
marking means in said register operated in response to
said connection and the further operation of said pulsing
means to operate said party marking relay, control means
16
i
to operate said coding detectors, said relay and make
contact means in said coding detectors operated upon op
eration of said detector to operate said plural digit regis
ter to simultaneously register said plural digit station des
5 ignation.
selectively operated from said register to complete a cir
cuit including said second source of potential and said
?rst source of potential and said ?rst device in order to
render said ?rst device conductive, said ‘second device
rendered conductive in response to the conductivity of
said ?rst device, and means including said ampli?ers con- 10
nected to said plurality of resistors controlled by the op
eration of said second device to operate said ampli?ers
References Cited in the ?le of this patent
UNITED STATES PATENTS
2,672,515
2,779,823
2,857,470
Barlow _____________ __ Mar. 16, 1954
Svala et al. __________ __ Jan. 29, 11957
Faulkner ____________ __. Oct. 21, 1958
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