GB492514A - Automatic telephone systems - Google Patents

Automatic telephone systems

Info

Publication number
GB492514A
GB492514A GB13458/38A GB1345838A GB492514A GB 492514 A GB492514 A GB 492514A GB 13458/38 A GB13458/38 A GB 13458/38A GB 1345838 A GB1345838 A GB 1345838A GB 492514 A GB492514 A GB 492514A
Authority
GB
United Kingdom
Prior art keywords
relays
digit
control
designation
exchange
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
GB13458/38A
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 GB492514A publication Critical patent/GB492514A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

492,514. Automatic exchange systems. STANDARD TELEPHONES & CABLES, Ltd. May 5, 1938, No. 13458. Convention date, May 6, 1937. [Class 40 (iv)] Instead of dialling, the calling subscriber pronounces the designation of the wanted subscriber into the microphone, and the resulting complex currents are analysed at the exchange into component fundamental frequencies and are translated into numerical form for controlling the selectors. The invention makes use of the fact that different words may be distinguished by their sound-frequency spectra. The spoken designation may comprise the code letters of the exchange as well as the number of the wanted subscriber. The calling line is extended to a finder-selector link 101, 103, with which the recording and translating apparatus is associated by a switch 105. The complex currents pass through an amplifier 109 in parallel to a number of band-pass filters 100-130 which are tuned to particular fundamental frequencies and which control selflocking relays 106-108 through gas-discharge tubes such as 112, 113. An A.C. source 111 is inductively coupled to the tubes 112, 113 to extinguish them shortly after they are fired. An additional band-pass filter 140 responsive to all speech frequencies, feeds gas-discharge tubes 142, 143 which are included in the locking circuits of relays 106-108 and which are extinguished by an inductively coupled A.C. source 141 when an interval occurs between the words of the spoken designation. The contacts of relays 106-108 are wired to control digit relays 160-169, one of which operates in response to each word representing a letter or digit. The digit relays 160-169 control relay registers which bring about the setting up of the connection in the usual manner or in a small system the digit relays may control the selectors directly.
GB13458/38A 1937-05-06 1938-05-05 Automatic telephone systems Expired GB492514A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US141049A US2293203A (en) 1937-05-06 1937-05-06 Automatic telephone system

Publications (1)

Publication Number Publication Date
GB492514A true GB492514A (en) 1938-09-21

Family

ID=22493937

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13458/38A Expired GB492514A (en) 1937-05-06 1938-05-05 Automatic telephone systems

Country Status (3)

Country Link
US (1) US2293203A (en)
FR (1) FR837566A (en)
GB (1) GB492514A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027596A1 (en) * 1979-10-17 1981-04-29 Telefonbau und Normalzeit GmbH Circuit arrangement for a telephone apparatus
EP0041195A1 (en) * 1980-05-30 1981-12-09 General Electric Company Improved paging arrangement
DE3049048A1 (en) * 1980-12-24 1982-07-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Telephone subscriber automatic dialling unit - has store into which required number is entered via speech recognition circuit
FR2531590A1 (en) * 1982-08-09 1984-02-10 Siemens Ag Method for transmitting particular orders in telephone exchanges, in particular in private telephone installations with additional sets.
GB2126393A (en) * 1982-08-20 1984-03-21 Asulab Sa Speech-controlled apparatus
EP0105441A1 (en) * 1982-09-30 1984-04-18 Siemens Aktiengesellschaft Telephone switching system for public or private telephone networks with at least one central dial information recording and processing device
GB2153630A (en) * 1982-01-28 1985-08-21 Int Mobile Machines Sound activated control system
GB2264209A (en) * 1992-02-06 1993-08-18 Technophone Ltd Cordless telephone arrangement

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2510268A (en) * 1948-10-16 1950-06-06 Daphne Invest Trust Wiring system for the selective filtering of vowel sounds
US2575909A (en) * 1949-07-01 1951-11-20 Bell Telephone Labor Inc Voice-operated system
US2575910A (en) * 1949-09-21 1951-11-20 Bell Telephone Labor Inc Voice-operated signaling system
US3381096A (en) * 1964-09-08 1968-04-30 Int Standard Electric Corp Signalling and detecting systems

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0027596A1 (en) * 1979-10-17 1981-04-29 Telefonbau und Normalzeit GmbH Circuit arrangement for a telephone apparatus
DE2941928A1 (en) * 1979-10-17 1981-04-30 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt CIRCUIT ARRANGEMENT FOR A TELEPHONE PARTNER STATION
EP0041195A1 (en) * 1980-05-30 1981-12-09 General Electric Company Improved paging arrangement
DE3049048A1 (en) * 1980-12-24 1982-07-01 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Telephone subscriber automatic dialling unit - has store into which required number is entered via speech recognition circuit
GB2153630A (en) * 1982-01-28 1985-08-21 Int Mobile Machines Sound activated control system
FR2531590A1 (en) * 1982-08-09 1984-02-10 Siemens Ag Method for transmitting particular orders in telephone exchanges, in particular in private telephone installations with additional sets.
GB2126393A (en) * 1982-08-20 1984-03-21 Asulab Sa Speech-controlled apparatus
EP0105441A1 (en) * 1982-09-30 1984-04-18 Siemens Aktiengesellschaft Telephone switching system for public or private telephone networks with at least one central dial information recording and processing device
GB2264209A (en) * 1992-02-06 1993-08-18 Technophone Ltd Cordless telephone arrangement
GB2264209B (en) * 1992-02-06 1995-11-08 Technophone Ltd Cordless telephone arrangement
US6349212B1 (en) 1992-02-06 2002-02-19 Nokia Mobile Phones Limited Cordless telephone arrangement

Also Published As

Publication number Publication date
US2293203A (en) 1942-08-18
FR837566A (en) 1939-02-14

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