US2267950A - Telephone system - Google Patents

Telephone system Download PDF

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Publication number
US2267950A
US2267950A US357518A US35751840A US2267950A US 2267950 A US2267950 A US 2267950A US 357518 A US357518 A US 357518A US 35751840 A US35751840 A US 35751840A US 2267950 A US2267950 A US 2267950A
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US
United States
Prior art keywords
tubes
line
potential
anode
lines
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US357518A
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English (en)
Inventor
William A Rhodes
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to US23388D priority Critical patent/USRE23388E/en
Priority to NL74027D priority patent/NL74027C/xx
Priority to BE477685D priority patent/BE477685A/xx
Priority to US357519A priority patent/US2270246A/en
Priority to US357518A priority patent/US2267950A/en
Application filed by Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US357520A priority patent/US2284870A/en
Priority to US388221A priority patent/US2319424A/en
Priority to GB11701/41A priority patent/GB548932A/en
Application granted granted Critical
Publication of US2267950A publication Critical patent/US2267950A/en
Priority to GB9605/42A priority patent/GB554091A/en
Priority to CH273261D priority patent/CH273261A/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/02—Details
    • H01J17/30—Igniting arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/08—Metering calls to called party, i.e. B-party charged for the communication

Definitions

  • This invention relates to telephone systems and more particularly to those systems in which the numerical indication of a calling line is automatically determined and made available.
  • a tone circuit is completed over the checking cord which is heard in the operators telephone set.
  • the tone circuit is not completed, and this fact indicates to the operator that the number given by the caller does not correspond to that of the station from which'he is calling, in which event service may be denied until the discrepancy is rectied.
  • My invention is principally concerned with the automatic identification of the calling line number and its principal feature is an arrangement of two main groups of vacuum tube devices and two auxiliary groups of vacuum tube devices which are arranged with respect to each other, respectively, to-.produce to coordinate translations of which the i'lrst provides an identification of each of the -rst two digits of the line number and t-he second provides an identication of each of the second two digits ofthe line number.
  • Each of the grids of the auxiliary tubes is connected-to a source of alternating current cf a specific frequency and since the cathodes are all connected to a source of filament current and their anodes to a source of positive potential in the known manner, said tubes are normally ac- 'tivated to modulate the anode potential with one or more frequencies, which potential is transmitted through appropriate coupling to the grids of the respective tubes in the main groups to which such anodes are connected.
  • the anodes of the tubes in each of the main groups are at negative potential when none of the lines connected thereto are calling,v the potential to which the main tube grids areraised by the operation of the auxiliary tubes is productive of no effect.
  • each of the main tubes bears a digital coordinate relation to the twenty-five lines connected to its respective anodes, and since the connection between the grids of the main tubes and the anodes of the auxiliary tubes is Adetermined by al certain frequency allocation to each numeral of a digit, there is presenti in the anode current of the two operated tubes in the main groups a plurality of distinct signals which singly ber. These signals be displayed or recorded by appropriate apparatus provided for the purpose.
  • Fig. 1 shows a partial diagrammatic layout of an automatic telephone line extension and the receiving equipment of the line identification circuit
  • Figs. 2 and 3 show,v in part, one of the two main groups of tubes
  • Figs. 4 and 5 show, in part, the other of the two main groups of tubes
  • Figs. 6 and 7 show the eight vacuum tubes of that auxiliary group of tubes which is operatively associated with the main group of vacuum tubes shown in Figs. 2 and 3;
  • Figs. 8 and 9 show the eight vacuum tubes of the other auxiliary group of tubes which is op eratively associated with the main group of tubes shown in Figs. 4 and 5; while Fig. 10 shows inclusive, should be arranged with group of four hundred other tubes tubes each, namely,
  • This arrangement is plainly shown by-the anode designations of the two main groups of tubes in Figs. 2 to 5, inclusive.
  • punching '1449 which, at one side is connected to conductor M9, is connected, on its 200 and 20
  • the line 1449 has a thousands-hundreds digit designation of 74 and since the column of four tubes 'I4XX identification of all the one anode in tube XX49-3 and particularly to the in the group QXX-SBXX which is reserved for the thousands-hundreds identification of the particular one hundred lines row.
  • an auxiliary group of eight forty-anode vacuum tubes is provided for each main group of tubes DUXX-SSXX .to the positive' side of are connected to the positive side of battery 902 via conductor 1
  • each separate group of grids in a column or row of tubes is connected via a condenser coupling to an anode in one or two of the tubes in the auxiliary group associated with one or the other, respectively, of the main group of tubes.
  • the order of connection is four grids in a column or row in a main group of tubes to an anode in one r two of the tubes in the associated auxiliary group whose grids are connected, respectively, to the frequency sources which, singly or in combination of two, will identify the two digits characterized by the column or row of tubes in the two main groups according to the following code:
  • the first, branch 600 is tube B whose grid is connected to frequency source b; the second, branch 60
  • anode 49 of tube 2 in the column MXX willhave a current passing through it composed of frequencies b, c, e and f in identification of the thousands-hundreds digits 74.
  • conductor 509 likewise has four branches, the first of which, branch 800.
  • anode 113 ci tube 3 in row XX49 will pass a current consisting of frequencies i, j, o and p in identification of the tens and units digits 49.
  • the four auxiliary tubes A to D are reserved for the four frequencies assigned to the thousands digit; the four tubes E to H are served for the four frethe hundreds digit; the four tubes I to L are reserved for the four frequencies assigned to the tens digit; and the four tubes M to P are reserved for the four frequencies assigned to the units digit.
  • the anodes of the auxiliary tubes each anode in a group of ten consecutive anodes counting from the bottom upward, is connected to the grids of a column or row of tubes in the main groups which characterizes one of the digits identified in whole or in part by the frequency connected to the grid of the auxiliary tube. Since four primary frequencies are used singly or in combinations of two to identify each numerical value of each of the four digits, it is clear that each auxiliary tube need not have more than forty anodes.
  • the receiving equipment is only schematically indicated in Fig. l since all its parts are well known and commercially available. It comprises a relay
  • the output side of the amplifier is connected to four groups of four filtering rectifying circuits of any suitable deconnected to anode 25 in It will be observed that, in my invention, there is no limit to the number of simultaneous line identications which can be type In fact the manner in which the connection 1s extended 1s 0f no controlling 1mp0rtance far as the line identlcation circuit itself is conto this invention other than the fact that what- Cerned, there @an be as many simultaneous ldenever means are usedwill include a relay
  • 49 has negative potential applied thereto through the winding of the cut-01T relay CO. This potential is, of course, further applied to the anodes 49 and 14 in the two tubes '
  • the cathode potential from battery 903, however, is maintained at slightly less negative value than that applied to the identifyment, relay
  • a calling line ldentication circuit for the lines of merical designation, and means responsive to the application of a potential to the control elements of calling lines for operating the associated electronic devices to produce an indication of the identity of each of said lines.
  • tube 3 in row XX49 is operated to pass a current between its cathode and such anode, modulated by freassociated vacuum of the four ltering rectiiying units, one for each digit of the linel number.
  • Each rectifying unit selectively operates on the frequency to which it is tuned and results in the operation of the relay individual to the unit.
  • the number of reing lines for operating the tubes to produce an indication of the identity of each of said lines.
  • An identiiicatlon circuit for the lines of a telephone system comprising in Acombination a tubes to produce a numerical identiiication of the line to which said potential was applied.
  • An identication circuit for the lines of a telephone system comprising in combination two of electronic devices normally adapted to groups of devices ordinately relative to the numerical designations of the lines of the system and electrically coupled to the electrodes of the devices of said first two groups, means potential through one of said lines when calling to an electronic device in each of said other two whereby said devices are rendered conducting to produce an alternating-current of the frequencies determined by the electrodes coupled to said devices, and means selectively responsive'to each of the frequencies present in the current produced by the operation of said devices for identifying the numerical designation of said calling line.
  • An identication circuit for the lines of a telephone system comprising in combination two groups of vacuum tubes each having a plurality of anodes, a grid and a cathode with each grid adapted to modulate a current flow between the cathode and all anodes in accordance with a specific frequency, two other groups of vacuum tubes disposed coordinately relative to the numerical designation of the lines of the system and having their respective grids electrically coupled to the anodes of the vacuum tubes of said first two groups, means for applying a signaling potential through one of said lines when calling to an anode of a tube in each of said two other groups of tubes whereby said tubes are activated to produce an alternating current of the frequencies determined by the grids of the tubes in said first two groups coupled to said activated tubes, and means selectively responsive to each of the frequencies present in the current produced by said activated tubes for identifying the numerical designation of said line.
  • a calling line identification circuit for the lines of a telephone system comprising two main groups of electronic devices having electrodes connected to said lines, two auxiliary groups of electronic devices for each of said main group of devices having electrodes connected to the grids of the devices in the associated main group and adapted to apply a potential of specific frequency to the grids thereof, means responsive to the application of a potential to the electrodes of the devices in the two main groups for operating said devices whereby an alternating potential having a plurality of frequencies is produced, and meansselectively responsive to each frequency for indicating the numerical designation of said calling line.
  • a calling line identification circuit for the lines of a telephone system comprising in combination two main groups of electronic devices having electrodes connected to said lines, two
  • auxiliary groups of electronic devices for each of said main group of devices having electrodes connected to theI grids of the devices in the associated main group'and adapted to apply a potential of specific frequency to the grids thereof, means responsive to the application of a potential to the electrodes of the devices in the two main groups for operating said devices whereby in response t the alternating potential on their Arespective grids, an alternating potential is produced through said electrodes, and circuit closing means including settable registers selectively responsive to each of the frequencies in said alternating potential for operating said for applying a signaling4 devices and setting said registers to indicate the identity of said line.
  • a calling line identification circut for the lines of a telephone system comprising in combination two main groups of electronic devices having electrodes connected to said lines, two auxiliary groups of electronic devices for each of said main group of devices having electrodes connected to the grids of the devices in the associated main group and adapted to apply a plural frequency alternating potential thereto, means responsive to the application of a potential to the electrodes of the line initiating a call for causing the associated electronic devices to become operative in producing an alternating current of the plural frequencies applied to the grids thereof, and means selectivelyY responsive to the frequencies present in said current for identifying the calling line to which said potential was applied.
  • An identification circuit for the lines of a telephone system comprising in combination an identifying conductor for each line, twogroups of electronic devices disposed in coordinate pattern in relation to the numerical designation of each of the lines in the system, each electronic device in each group having a plurality of electrodes connected to as many line identifying conductors for identifying two digits ofthe associated line number and to an electrode in a device of the other group for identifying two other digits of the same line number, means for applying a signaling potential to the identifying conductor of one of said lines when calling and, therethrough, to the electrode in a device in each group connected thereto whereby said devices are activated, to pass a current therethrough, means for modulating said current to a plural frequency current in accordance with a frequency allocation to each numeral of a digit in each of the four digits of a line number, and
  • An identification circuit for the lines of a telephone system comprising in combination with an identifying conductor for each line, a rst pair of electronic devices for a group' of said lines, each of said devices having an electrode for each line in the group connected to the identifying conductor thereof, a plurality of other electronic devices each having an electrode connected to the grid of a device in said first pair and adapted to apply a potential of specific frequency thereto in accordance with a frequency allocation to the digits of the line numbers, means responsive to the application of a lsignaling potential to the identifying conductor of a calling line in through, to the electrodes of the rst pair of devices connected to said conductor for operating said pair of devices to produce an alternathaving the same plural frequencies as the potential on the grid thereof, and means responsive to the operation of -said first pair of devices for identifying the conductor to which said signaling potential was applied.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Interface Circuits In Exchanges (AREA)
US357518A 1940-09-20 1940-09-20 Telephone system Expired - Lifetime US2267950A (en)

Priority Applications (10)

Application Number Priority Date Filing Date Title
BE477685D BE477685A (en, 2012) 1940-09-20
US23388D USRE23388E (en) 1940-09-20 Line identification circuit for
NL74027D NL74027C (en, 2012) 1940-09-20
US357518A US2267950A (en) 1940-09-20 1940-09-20 Telephone system
US357519A US2270246A (en) 1940-09-20 1940-09-20 Telephone system
US357520A US2284870A (en) 1940-09-20 1940-09-20 Telephone system
US388221A US2319424A (en) 1940-09-20 1941-04-12 Telephone system
GB11701/41A GB548932A (en) 1940-09-20 1941-09-12 Telephone systems
GB9605/42A GB554091A (en) 1940-09-20 1942-07-10 Telephone systems
CH273261D CH273261A (de) 1940-09-20 1947-10-21 Anlage für das Ausmitteln von Leitungen eines Telephonnetzes.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US357518A US2267950A (en) 1940-09-20 1940-09-20 Telephone system
US388221A US2319424A (en) 1940-09-20 1941-04-12 Telephone system

Publications (1)

Publication Number Publication Date
US2267950A true US2267950A (en) 1941-12-30

Family

ID=26999687

Family Applications (3)

Application Number Title Priority Date Filing Date
US23388D Expired USRE23388E (en) 1940-09-20 Line identification circuit for
US357518A Expired - Lifetime US2267950A (en) 1940-09-20 1940-09-20 Telephone system
US388221A Expired - Lifetime US2319424A (en) 1940-09-20 1941-04-12 Telephone system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US23388D Expired USRE23388E (en) 1940-09-20 Line identification circuit for

Family Applications After (1)

Application Number Title Priority Date Filing Date
US388221A Expired - Lifetime US2319424A (en) 1940-09-20 1941-04-12 Telephone system

Country Status (5)

Country Link
US (3) US2267950A (en, 2012)
BE (1) BE477685A (en, 2012)
CH (1) CH273261A (en, 2012)
GB (2) GB548932A (en, 2012)
NL (1) NL74027C (en, 2012)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424585A (en) * 1941-03-07 1947-07-29 Int Standard Electric Corp Telecommunication system
US2440277A (en) * 1941-08-21 1948-04-27 Int Standard Electric Corp Calling line identification system
US2454770A (en) * 1941-04-25 1948-11-30 Int Standard Electric Corp Identification circuit arrangement for automatic or semiautomatic telephone systems
US2484612A (en) * 1946-05-17 1949-10-11 Bell Telephone Labor Inc Directory number calling line identifier
US2550585A (en) * 1949-04-26 1951-04-24 Bell Telephone Labor Inc Telephone identification circuit
US2562717A (en) * 1947-08-22 1951-07-31 Bell Telephone Labor Inc Dialed number recovery circuit
US2586704A (en) * 1942-08-06 1952-02-19 Automatic Elect Lab Message data recording telephone system
US2594923A (en) * 1948-06-16 1952-04-29 Bell Telephone Labor Inc Call data recording telephone system

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2490038A (en) * 1941-06-26 1949-12-06 Int Standard Electric Corp Electrical signaling system
US2698880A (en) * 1943-05-05 1955-01-04 American Telephone & Telegraph Calling line identifier
US2532750A (en) * 1946-08-03 1950-12-05 Automatic Telephone & Elect Calling line identifier having display device at operator's position
US2532926A (en) * 1947-02-14 1950-12-05 Automatic Elect Lab Party line metering, including selection of the meter prior to signaling the operator
US2633498A (en) * 1948-12-29 1953-03-31 Bell Telephone Labor Inc Selecting and two-way translating system
US2639330A (en) * 1949-03-04 1953-05-19 Automatic Elect Lab Calling line identification apparatus
US2594505A (en) * 1949-12-09 1952-04-29 Bell Telephone Labor Inc Calling line identification and registering system
BE500226A (en, 2012) * 1949-12-24
US2607891A (en) * 1950-06-10 1952-08-19 Bell Telephone Labor Inc Translating circuits utilizing glow discharge devices

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424585A (en) * 1941-03-07 1947-07-29 Int Standard Electric Corp Telecommunication system
US2454770A (en) * 1941-04-25 1948-11-30 Int Standard Electric Corp Identification circuit arrangement for automatic or semiautomatic telephone systems
US2440277A (en) * 1941-08-21 1948-04-27 Int Standard Electric Corp Calling line identification system
US2586704A (en) * 1942-08-06 1952-02-19 Automatic Elect Lab Message data recording telephone system
US2484612A (en) * 1946-05-17 1949-10-11 Bell Telephone Labor Inc Directory number calling line identifier
US2562717A (en) * 1947-08-22 1951-07-31 Bell Telephone Labor Inc Dialed number recovery circuit
US2594923A (en) * 1948-06-16 1952-04-29 Bell Telephone Labor Inc Call data recording telephone system
US2550585A (en) * 1949-04-26 1951-04-24 Bell Telephone Labor Inc Telephone identification circuit

Also Published As

Publication number Publication date
NL74027C (en, 2012)
CH273261A (de) 1951-01-31
GB554091A (en) 1943-06-18
BE477685A (en, 2012)
USRE23388E (en) 1951-07-10
US2319424A (en) 1943-05-18
GB548932A (en) 1942-10-29

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