GB532597A - Improvements in telephony - Google Patents

Improvements in telephony

Info

Publication number
GB532597A
GB532597A GB25503/39A GB2550339A GB532597A GB 532597 A GB532597 A GB 532597A GB 25503/39 A GB25503/39 A GB 25503/39A GB 2550339 A GB2550339 A GB 2550339A GB 532597 A GB532597 A GB 532597A
Authority
GB
United Kingdom
Prior art keywords
relay
valve
receiving
rectifiers
sept
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
GB25503/39A
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.)
Philips Lamps Ltd
Koninklijke Philips NV
Original Assignee
Philips Lamps Ltd
Philips Gloeilampenfabrieken NV
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 Philips Lamps Ltd, Philips Gloeilampenfabrieken NV filed Critical Philips Lamps Ltd
Publication of GB532597A publication Critical patent/GB532597A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/14—Arrangements providing for calling or supervisory signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Meter Arrangements (AREA)
GB25503/39A 1938-09-12 1939-09-09 Improvements in telephony Expired GB532597A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN42451A DE722560C (de) 1938-09-12 1938-09-12 Signalempfaenger

Publications (1)

Publication Number Publication Date
GB532597A true GB532597A (en) 1941-01-28

Family

ID=27797497

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25503/39A Expired GB532597A (en) 1938-09-12 1939-09-09 Improvements in telephony

Country Status (6)

Country Link
US (1) US2336768A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
BE (1) BE436359A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE722560C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR862367A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB532597A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NL (1) NL54271C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2440049A (en) * 1945-06-30 1948-04-20 Rca Corp Electronic audio switch
US2490243A (en) * 1947-06-12 1949-12-06 Philco Corp Electronic cycle counting circuit
US3611940A (en) * 1948-02-27 1971-10-12 Us Navy Simplified proximity fuze and/or howitzer shells
US2681386A (en) * 1948-07-13 1954-06-15 Automatic Telephone & Elect Electrical signaling system using nonlinear resistors for control
US2801290A (en) * 1951-09-17 1957-07-30 Telefunken Gmbh Calling signal responder arrangements
DE1053579B (de) * 1954-05-17 1959-03-26 Telefunken Gmbh Schaltungsanordnung fuer die Herstellung von Verbindungen in Fernmelde- und Fernsteueranlagen
US2830128A (en) * 1954-12-21 1958-04-08 Itt Condenser-timed delayed signal repeater
US3048660A (en) * 1958-07-31 1962-08-07 Bell Telephone Labor Inc Telephone pay station system

Also Published As

Publication number Publication date
FR862367A (fr) 1941-03-05
US2336768A (en) 1943-12-14
DE722560C (de) 1943-05-20
BE436359A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1939-10-31
NL54271C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1943-04-15

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