BE595321A - Récepteurs à fréquences vocales. - Google Patents

Récepteurs à fréquences vocales.

Info

Publication number
BE595321A
BE595321A BE595321A BE595321A BE595321A BE 595321 A BE595321 A BE 595321A BE 595321 A BE595321 A BE 595321A BE 595321 A BE595321 A BE 595321A BE 595321 A BE595321 A BE 595321A
Authority
BE
Belgium
Prior art keywords
voice frequency
frequency receivers
receivers
voice
frequency
Prior art date
Application number
BE595321A
Other languages
English (en)
Inventor
H K Ligotky
Original Assignee
Bell Telephone Mfg
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 Bell Telephone Mfg filed Critical Bell Telephone Mfg
Publication of BE595321A publication Critical patent/BE595321A/fr

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)
BE595321A 1959-09-24 1960-09-23 Récepteurs à fréquences vocales. BE595321A (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
BE595321A true BE595321A (fr) 1961-03-23

Family

ID=29251443

Family Applications (1)

Application Number Title Priority Date Filing Date
BE595321A BE595321A (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
FR78432E (fr) 1962-07-20
US3103558A (en) 1963-09-10
DE1128480B (de) 1962-04-26

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