FR78432E - Récepteurs à fréquences vocales - Google Patents

Récepteurs à fréquences vocales

Info

Publication number
FR78432E
FR78432E FR839366A FR839366A FR78432E FR 78432 E FR78432 E FR 78432E FR 839366 A FR839366 A FR 839366A FR 839366 A FR839366 A FR 839366A FR 78432 E FR78432 E FR 78432E
Authority
FR
France
Prior art keywords
voice frequency
frequency receivers
receivers
voice
frequency
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
FR839366A
Other languages
English (en)
Inventor
Harri Kurt Ligotky
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Application granted granted Critical
Publication of FR78432E publication Critical patent/FR78432E/fr
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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
FR839366A 1959-09-24 1960-09-23 Récepteurs à fréquences vocales Expired FR78432E (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84213659A 1959-09-24 1959-09-24

Publications (1)

Publication Number Publication Date
FR78432E true FR78432E (fr) 1962-07-20

Family

ID=29251443

Family Applications (1)

Application Number Title Priority Date Filing Date
FR839366A Expired FR78432E (fr) 1959-09-24 1960-09-23 Récepteurs à fréquences vocales

Country Status (4)

Country Link
US (1) US3103558A (fr)
BE (1) BE595321A (fr)
DE (1) DE1128480B (fr)
FR (1) FR78432E (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3253224A (en) * 1959-10-27 1966-05-24 Nat Rejectors Gmbh Frequency selective circuits for currency detectors
DE1146137B (de) * 1961-11-16 1963-03-28 Standard Elektrik Lorenz Ag Tonfrequenzsignalempfaenger mit Sprachsperre
DE1232211B (de) * 1963-04-02 1967-01-12 Standard Elektrik Lorenz Ag Schaltungsanordnung zum Schutz gegen Fehlansprechen von Empfaengern in Fernmelde-, insbesondere Fernsprechanlagen mit Mehrfrequenzcodewahl
US3306984A (en) * 1963-12-16 1967-02-28 Bell Telephone Labor Inc Elimination of talk-off in in-band signaling systems
US3351945A (en) * 1964-02-07 1967-11-07 United States Steel Corp Safety remote control for a carrier
US3349191A (en) * 1965-01-07 1967-10-24 Bell Telephone Labor Inc Talk-off protection for in-band telephone signaling systems
US4169969A (en) * 1974-11-21 1979-10-02 Societe Lignes Telegraphiques Et Telephoniques Apparatus for detecting in-band signalling signals
JPS5327332A (en) * 1976-08-26 1978-03-14 Hitachi Ltd Sound response unit of entirely double type
US4272843A (en) * 1978-06-13 1981-06-09 Licentia Patent-Verwaltungs-G.M.B.H System for transmitting service communications
AU644951B2 (en) * 1991-04-16 1993-12-23 Telecom Technologies Pty Ltd Call tone analyser

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE466455A (fr) * 1942-04-28
US2577614A (en) * 1948-10-29 1951-12-04 Bell Telephone Labor Inc Voice-frequency signaling system
NL81147C (nl) * 1951-04-27 1956-03-16 Bell Telephone Manf Co Sa Ontvangstinrichting voor toonfrequentiesignalen
NL93729C (nl) * 1951-04-27 1960-02-16 Bell Telephone Manf Co Sa Ontvanginrichting voor toonfrequentiesignalen
US2806903A (en) * 1954-03-24 1957-09-17 Int Standard Electric Corp Voice frequency signal receivers
US2964650A (en) * 1954-12-08 1960-12-13 Itt Signal system including a diode limiter
US2830128A (en) * 1954-12-21 1958-04-08 Itt Condenser-timed delayed signal repeater
DE1015487B (de) * 1955-06-03 1957-09-12 Standard Elektrik Ag Schaltungsanordnung zum Ausgleich verschiedener Signalpegel in einer Empfangseinrichtung fuer Signale nach dem Frequenzkodesystem
US2929880A (en) * 1955-10-24 1960-03-22 Ralph D Collins Subset identification gate circuit
DE1013708B (de) * 1955-12-22 1957-08-14 Siemens Ag Schaltungsanordnung zum Empfang von Signalspannungen
US2883474A (en) * 1957-12-24 1959-04-21 Bell Telephone Labor Inc Transistor gating circuit
US2935572A (en) * 1958-09-15 1960-05-03 Gen Dynamics Corp Electrical signaling system

Also Published As

Publication number Publication date
BE595321A (fr) 1961-03-23
US3103558A (en) 1963-09-10
DE1128480B (de) 1962-04-26

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