BE495507A - - Google Patents

Info

Publication number
BE495507A
BE495507A BE495507DA BE495507A BE 495507 A BE495507 A BE 495507A BE 495507D A BE495507D A BE 495507DA BE 495507 A BE495507 A BE 495507A
Authority
BE
Belgium
Application number
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.)
Publication of BE495507A publication Critical patent/BE495507A/xx
Priority claimed from GB1198249A external-priority patent/GB692476A/en

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)
  • Amplifiers (AREA)
BE495507D 1949-05-05 BE495507A (nl)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2658112X 1949-05-05
GB1198249A GB692476A (en) 1949-05-27 1949-05-27 Improvements relating to electrical signalling systems

Publications (1)

Publication Number Publication Date
BE495507A true BE495507A (nl)

Family

ID=32299742

Family Applications (1)

Application Number Title Priority Date Filing Date
BE495507D BE495507A (nl) 1949-05-05

Country Status (2)

Country Link
US (1) US2658112A (nl)
BE (1) BE495507A (nl)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2749390A (en) * 1952-12-02 1956-06-05 Itt Ringing circuit for telephone line and radio order wire
FR1096599A (fr) * 1953-12-22 1955-06-22 Lignes Telegraph Telephon Dispositif comportant des éléments non linéaires associés à des circuits sélectifs
US2816962A (en) * 1954-11-10 1957-12-17 T S Skillman And Company Pty L Steady-state signalling using alternating currents
US2957950A (en) * 1954-11-18 1960-10-25 Bell Telephone Labor Inc Transistor selective ringing circuit
US2955161A (en) * 1956-06-29 1960-10-04 Automatic Elect Lab Tone detector for coin control
US3124658A (en) * 1958-02-28 1964-03-10 Input
US3090838A (en) * 1958-04-15 1963-05-21 Westrex Company Ltd Selective signaling system
US3131264A (en) * 1960-04-13 1964-04-28 Int Standard Electric Corp Multi-frequency signalling receivers
US3143602A (en) * 1961-05-19 1964-08-04 Bell Telephone Labor Inc Multifrequency signal receiver

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2173427A (en) * 1937-08-30 1939-09-19 Gen Radio Co Electric oscillator
US2237661A (en) * 1937-10-07 1941-04-08 Siemens App Und Maschinen Gmbh Keying device for ultra-short-wave transmitters
US2284855A (en) * 1939-08-16 1942-06-02 Bell Telephone Labor Inc Amplifier circuits
US2266541A (en) * 1940-10-02 1941-12-16 Rca Corp Limiter output control
US2316909A (en) * 1941-05-15 1943-04-20 Rca Corp Selective tuned circuits
US2350951A (en) * 1941-10-31 1944-06-06 Bell Telephone Labor Inc Electric wave system
US2397337A (en) * 1942-09-10 1946-03-26 Rca Corp Protecting arrangement for thermionic valve circuits
US2457131A (en) * 1946-09-25 1948-12-28 Faximile Inc Facsimile overload control with nonlinear resistance in output
US2496909A (en) * 1947-10-01 1950-02-07 Rca Corp Pulse amplitude discrimination

Also Published As

Publication number Publication date
US2658112A (en) 1953-11-03

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