GB543841A - Improvements relating to electrical communication systems - Google Patents

Improvements relating to electrical communication systems

Info

Publication number
GB543841A
GB543841A GB11628/40A GB1162840A GB543841A GB 543841 A GB543841 A GB 543841A GB 11628/40 A GB11628/40 A GB 11628/40A GB 1162840 A GB1162840 A GB 1162840A GB 543841 A GB543841 A GB 543841A
Authority
GB
United Kingdom
Prior art keywords
circuit
spare
cancelled
switching
arrangement
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
GB11628/40A
Other languages
English (en)
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 GB543841A publication Critical patent/GB543841A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/52—Circuit arrangements for protecting such amplifiers
    • H03F1/54—Circuit arrangements for protecting such amplifiers with tubes only
    • H03F1/542—Replacing by standby devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/74—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for increasing reliability, e.g. using redundant or spare channels or apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/16—Monitoring arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Amplifiers (AREA)
  • Radio Relay Systems (AREA)
GB11628/40A 1939-09-28 1940-07-12 Improvements relating to electrical communication systems Expired GB543841A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US296890A US2229089A (en) 1939-09-28 1939-09-28 Switching of spare channel
US296891A US2229090A (en) 1939-09-28 1939-09-28 Switching of spare repeater sections
US296892A US2229108A (en) 1939-09-28 1939-09-28 Switching of spare repeater sections
US296893A US2229158A (en) 1939-09-28 1939-09-28 Switching of spare repeater sections

Publications (1)

Publication Number Publication Date
GB543841A true GB543841A (en) 1942-03-16

Family

ID=42710534

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11628/40A Expired GB543841A (en) 1939-09-28 1940-07-12 Improvements relating to electrical communication systems

Country Status (4)

Country Link
US (4) US2229158A (enrdf_load_stackoverflow)
BE (1) BE441443A (enrdf_load_stackoverflow)
FR (1) FR869045A (enrdf_load_stackoverflow)
GB (1) GB543841A (enrdf_load_stackoverflow)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2478395A (en) * 1943-03-05 1949-08-09 Automatic Elect Lab Automatic by-pass for repeaters
US2552787A (en) * 1946-11-23 1951-05-15 Automatic Elect Lab Channel switching in voice current repeater stations
GB653966A (en) * 1948-07-13 1951-05-30 Standard Telephones Cables Ltd Improvements in or relating to the automatic replacement of defectiye repeating or receiving equipment in high frequency electric communication systems
US2592716A (en) * 1949-03-25 1952-04-15 Bell Telephone Labor Inc Self-correcting amplifier
US2773944A (en) * 1950-08-08 1956-12-11 Bendix Aviat Corp Amplifying system with stand-by channel
US2625613A (en) * 1950-10-04 1953-01-13 Maico Company Inc Tone interrupter for audiometers
US2686256A (en) * 1951-02-06 1954-08-10 Bell Telephone Labor Inc Signal transmission system
US2663010A (en) * 1952-02-01 1953-12-15 Itt Switching system
NL88027C (enrdf_load_stackoverflow) * 1953-03-28
US2802990A (en) * 1953-08-04 1957-08-13 Ericsson Telefon Ab L M Switching system in multiple line multiplex transmission system
DE954796C (de) * 1954-09-25 1956-12-20 Siemens Ag UEbertragungsanlage mit Breitbandkabel mit koaxialen Leitern
US3009133A (en) * 1956-06-25 1961-11-14 Westinghouse Air Brake Co Automatic changeover for carrier circuits
US3111624A (en) * 1960-01-04 1963-11-19 Bell Telephone Labor Inc Automatic system for selectively substituting spare channels for failed working channels in a multichannel multilink communication system
NL260534A (enrdf_load_stackoverflow) * 1960-02-10
US3170071A (en) * 1960-03-30 1965-02-16 Ibm Error correction device utilizing spare substitution
NL267532A (enrdf_load_stackoverflow) * 1960-07-29
US3138781A (en) * 1960-12-21 1964-06-23 Westinghouse Brake & Signal Electronic drive circuits for remote control systems
US3202941A (en) * 1960-12-23 1965-08-24 Bell Telephone Labor Inc High frequency channel switching unit, employing electromechanical contact means
US3248693A (en) * 1961-09-25 1966-04-26 Bell Telephone Labor Inc Data transmission system for operation in signal environment with a high noise level
US3204204A (en) * 1962-09-26 1965-08-31 Automatic Elect Lab Fast-switching arrangement for the transfer of communication channels
NL6408627A (nl) * 1964-07-29 1966-01-31 Philips Nv Transmissie-inrichting
US3451042A (en) * 1964-10-14 1969-06-17 Westinghouse Electric Corp Redundant signal transmission system
US3319088A (en) * 1964-11-25 1967-05-09 John B Payne Selective delay device
NL6507233A (enrdf_load_stackoverflow) * 1965-06-05 1966-12-06
US3403357A (en) * 1966-04-14 1968-09-24 Hughes Aircraft Co Switching apparatus for selectively coupling a predetermined number of microwave devices between an input and an output port
US3519945A (en) * 1967-09-05 1970-07-07 Bell Telephone Labor Inc System for replacing all or part of a faulty amplifier
US3868584A (en) * 1971-02-08 1975-02-25 Henry Richard Beurrier Amplifier with input and output match
US4264894A (en) * 1979-06-18 1981-04-28 Ellington Stephen P Fault bypass for data transmission system
FR2511772A1 (fr) * 1981-08-24 1983-02-25 Inst Francais Du Petrole Dispositif de transmission sequentielle de signaux par radio ou par cable, entre un systeme central de commande et des appareils d'acquisition de donnees
US4565972A (en) * 1985-03-18 1986-01-21 Tx Rx Systems, Inc. Tower mounted preamplifier
US5418490A (en) * 1994-03-01 1995-05-23 Tx Rx Systems, Inc. Failure responsive alternate amplifier and bypass system for communications amplifier

Also Published As

Publication number Publication date
US2229089A (en) 1941-01-21
US2229090A (en) 1941-01-21
FR869045A (fr) 1942-01-22
US2229108A (en) 1941-01-21
BE441443A (enrdf_load_stackoverflow) 1941-11-29
US2229158A (en) 1941-01-21

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