FR854758A - Signal receiver for telephony - Google Patents

Signal receiver for telephony

Info

Publication number
FR854758A
FR854758A FR854758DA FR854758A FR 854758 A FR854758 A FR 854758A FR 854758D A FR854758D A FR 854758DA FR 854758 A FR854758 A FR 854758A
Authority
FR
France
Prior art keywords
telephony
signal receiver
receiver
signal
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
Other languages
French (fr)
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.)
Koninklijke Philips NV
Original Assignee
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 Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of FR854758A publication Critical patent/FR854758A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Relay Circuits (AREA)
FR854758D 1938-05-16 1939-05-15 Signal receiver for telephony Expired FR854758A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE525676X 1938-05-16

Publications (1)

Publication Number Publication Date
FR854758A true FR854758A (en) 1940-04-24

Family

ID=6552697

Family Applications (1)

Application Number Title Priority Date Filing Date
FR854758D Expired FR854758A (en) 1938-05-16 1939-05-15 Signal receiver for telephony

Country Status (4)

Country Link
US (1) US2265203A (en)
BE (1) BE434364A (en)
FR (1) FR854758A (en)
GB (1) GB525676A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2489391A (en) * 1943-12-09 1949-11-29 Photoswitch Inc Thermally controlled electric relay
US2456427A (en) * 1944-11-28 1948-12-14 Gen Electric Protective system for electric motors
US2483408A (en) * 1945-03-26 1949-10-04 Standard Telephones Cables Ltd Relay circuit
US2516361A (en) * 1945-08-21 1950-07-25 Gen Railway Signal Co Voice frequency signal device
US2608608A (en) * 1946-01-29 1952-08-26 Ipsophon Patentgesellschaft A Electrical relay system
US2943588A (en) * 1946-04-22 1960-07-05 Martin G Sateren Control system for torpedo
NL69785C (en) * 1947-02-21
US2543309A (en) * 1947-10-15 1951-02-27 Andersson Ivan Means for automatically operating a number of electric relays or solenoids at a preset time
US2534895A (en) * 1948-02-28 1950-12-19 Westinghouse Electric Corp Auxiliary power system for aircraft
US2592825A (en) * 1948-09-03 1952-04-15 Gen Electric Co Ltd Frequency difference indicator
US2689279A (en) * 1949-09-21 1954-09-14 Maurice J Noregaard Electric switch
US2687500A (en) * 1949-12-06 1954-08-24 Westinghouse Electric Corp Circuit interrupter
US2706258A (en) * 1951-06-16 1955-04-12 Bell Telephone Labor Inc Voltage testing circuit
US2776383A (en) * 1952-04-21 1957-01-01 Robotron Corp Multi-function electronic timing circuit
US2773221A (en) * 1952-08-12 1956-12-04 Columbia Broadcasting Syst Inc Timing circuit
US3048660A (en) * 1958-07-31 1962-08-07 Bell Telephone Labor Inc Telephone pay station system
NL273286A (en) * 1961-01-07
US3475561A (en) * 1965-09-29 1969-10-28 Superior Continental Corp Telephone carrier system having selfcontained independently attachable line tap units

Also Published As

Publication number Publication date
GB525676A (en) 1940-09-02
US2265203A (en) 1941-12-09
BE434364A (en)

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