CH254957A - Selective electrical signal receiver. - Google Patents

Selective electrical signal receiver.

Info

Publication number
CH254957A
CH254957A CH254957DA CH254957A CH 254957 A CH254957 A CH 254957A CH 254957D A CH254957D A CH 254957DA CH 254957 A CH254957 A CH 254957A
Authority
CH
Switzerland
Prior art keywords
electrical signal
signal receiver
selective electrical
selective
receiver
Prior art date
Application number
Other languages
German (de)
Inventor
Ag Standard Telephon Und Radio
Original Assignee
Standard Telephon & Radio Ag
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 Standard Telephon & Radio Ag filed Critical Standard Telephon & Radio Ag
Publication of CH254957A publication Critical patent/CH254957A/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)
  • Interface Circuits In Exchanges (AREA)
  • Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
  • Amplifiers (AREA)
CH254957D 1941-09-15 1946-05-24 Selective electrical signal receiver. CH254957A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11782/41A GB551951A (en) 1941-09-15 1941-09-15 Improvements in or relating to electric signalling systems

Publications (1)

Publication Number Publication Date
CH254957A true CH254957A (en) 1948-05-31

Family

ID=27799776

Family Applications (1)

Application Number Title Priority Date Filing Date
CH254957D CH254957A (en) 1941-09-15 1946-05-24 Selective electrical signal receiver.

Country Status (6)

Country Link
US (1) US2343759A (en)
BE (1) BE479786A (en)
CH (1) CH254957A (en)
FR (1) FR933246A (en)
GB (1) GB551951A (en)
NL (1) NL70720C (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2476311A (en) * 1943-02-01 1949-07-19 Sperry Corp Ultra high frequency discriminator and apparatus
US2533286A (en) * 1946-07-22 1950-12-12 Univ Minnesota Heat sensitive circuits
BE481448A (en) * 1947-02-07
US2706272A (en) * 1949-11-03 1955-04-12 Jones Lloyd Voltage stabilizing circuit
US2801290A (en) * 1951-09-17 1957-07-30 Telefunken Gmbh Calling signal responder arrangements
US2957950A (en) * 1954-11-18 1960-10-25 Bell Telephone Labor Inc Transistor selective ringing circuit
US2987713A (en) * 1957-07-12 1961-06-06 Kidde & Co Walter Sensitivity control of apparatus for detecting distrubances in an enclosure

Also Published As

Publication number Publication date
GB551951A (en) 1943-03-17
BE479786A (en)
NL70720C (en)
FR933246A (en) 1948-04-14
US2343759A (en) 1944-03-07

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