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GB600261A - Electric pulse communication and signalling system - Google Patents

Electric pulse communication and signalling system

Info

Publication number
GB600261A
GB600261A GB3162/45A GB316245A GB600261A GB 600261 A GB600261 A GB 600261A GB 3162/45 A GB3162/45 A GB 3162/45A GB 316245 A GB316245 A GB 316245A GB 600261 A GB600261 A GB 600261A
Authority
GB
United Kingdom
Prior art keywords
channel
signalling
source
pulse
modulation
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
Application number
GB3162/45A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB600261A publication Critical patent/GB600261A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/16—Electric signal transmission systems in which transmission is by pulses
    • G08C19/28—Electric signal transmission systems in which transmission is by pulses using pulse code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/12—Arrangements providing for calling or supervisory signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Alarm Systems (AREA)

Abstract

600,261. Pulse modulation. STANDARD TELEPHONES & CABLES, Ltd. Feb. 7, 1945, No. 3162. Convention date, Oct. 4, 1943. [Class 40 (v)] In a modulated pulse communication system, calling and other signalling is effected by the production of a signal interval during which the pulses are suppressed or displaced by a constant amount corresponding to a D.C. modulation, or modulated by a special low-frequency signal source. In one embodiment, Fig. 1 (not shown), applied to a pulse multiplex system, signalling keys are arranged to disconnect the outputs of the channel transmitters. At the individual channel receivers a valve responsive to the cessation of its pulse input operates a buzzer, through a relay, during the signalling intervals. In a second multiplex system, each channel is provided with a key 36, Fig. 3, which connects a D.C. source 35 to the channel modulator and the corresponding receiver demodulator 16 is arranged to produce a corresponding D.C. output which energizes relay 32 and buzzer 34 through valve 31 which is irresponsive to normal modulation fed to the channel output through condenser 24. The D.C. source may be replaced by a low-frequency signalling source and a low-pass filter provided at the receiver to select the signal output. Specifications 509,820, 521,139 and 600,259 are referred to.
GB3162/45A 1943-10-11 1945-02-07 Electric pulse communication and signalling system Expired GB600261A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US505778A US2438903A (en) 1943-10-11 1943-10-11 Pulse communication system employing pulse frequency reduction for signaling

Publications (1)

Publication Number Publication Date
GB600261A true GB600261A (en) 1948-04-05

Family

ID=24011779

Family Applications (2)

Application Number Title Priority Date Filing Date
GB22121/44A Expired GB583629A (en) 1943-10-11 1944-11-09 Improvements in or relating to signalling arrangements for electric pulse communication systems
GB3162/45A Expired GB600261A (en) 1943-10-11 1945-02-07 Electric pulse communication and signalling system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB22121/44A Expired GB583629A (en) 1943-10-11 1944-11-09 Improvements in or relating to signalling arrangements for electric pulse communication systems

Country Status (5)

Country Link
US (1) US2438903A (en)
BE (2) BE481274A (en)
CH (2) CH276277A (en)
FR (2) FR946811A (en)
GB (2) GB583629A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003009A2 (en) * 1977-12-22 1979-07-11 Telefonaktiebolaget L M Ericsson A method and an apparatus for transferring digital information in a telephone system

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2485611A (en) * 1944-04-07 1949-10-25 Standard Telephones Cables Ltd Broadcasting system
US2516885A (en) * 1944-04-17 1950-08-01 Standard Telephones Cables Ltd Relay system
BE478612A (en) * 1947-01-02
US2534842A (en) * 1947-10-10 1950-12-19 Panoramic Radio Corp Dual synchrometric system
US2534844A (en) * 1947-11-26 1950-12-19 Panoramic Radio Corp Gated triple synchrometric system
US2590746A (en) * 1948-09-10 1952-03-25 Lee E Adler Control system for carrier telecommunication circuits
US2773937A (en) * 1949-12-24 1956-12-11 Gen Dynamics Corp Electronic signaling and switching system
DE957241C (en) * 1951-04-17 1957-01-31 Cie Ind Des Telephones Sa Arrangement for signaling in pulse transmission systems
US2945094A (en) * 1954-09-07 1960-07-12 Itt Pulse signalling system
US2962553A (en) * 1954-11-23 1960-11-29 Donald E Campbell Coding and decoding system
NL269710A (en) * 1960-10-20
US3146314A (en) * 1961-09-25 1964-08-25 Gen Dynamics Corp Means for generating warbling tone ringing signals in a time division multiplex communication system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1484405A (en) * 1920-01-12 1924-02-19 Western Electric Co Signaling system
US1532336A (en) * 1920-12-18 1925-04-07 Rca Corp Wireless-telegraph calling device
US2048081A (en) * 1933-04-29 1936-07-21 Alger S Riggs Communication system
GB418525A (en) * 1933-05-20 1934-10-26 Newsome Henry Clough Improvements in calling devices in connection with wireless signalling or carrier frequency line signalling systems
GB470495A (en) * 1935-11-14 1937-08-16 Alan Dower Blumlein Improvements in or relating to multiplex signalling systems
US2204375A (en) * 1937-03-17 1940-06-11 Morrison Montford Electronic distributor system
US2213941A (en) * 1938-07-26 1940-09-03 Bell Telephone Labor Inc Multiplex signaling by phase discrimination
US2263369A (en) * 1939-02-03 1941-11-18 Hartford Nat Bank & Trust Co Multiplex telephony system
NL60289C (en) * 1939-02-20

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0003009A2 (en) * 1977-12-22 1979-07-11 Telefonaktiebolaget L M Ericsson A method and an apparatus for transferring digital information in a telephone system
EP0003009A3 (en) * 1977-12-22 1979-07-25 Telefonaktiebolaget L M Ericsson A method and an apparatus for transferring digital information in a telephone system

Also Published As

Publication number Publication date
BE481274A (en)
FR946811A (en) 1949-06-15
US2438903A (en) 1948-04-06
CH276277A (en) 1951-06-30
BE473141A (en)
FR57499E (en) 1953-01-28
GB583629A (en) 1946-12-23
CH262447A (en) 1949-06-30

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