CH222392A - Telephone set circuit. - Google Patents

Telephone set circuit.

Info

Publication number
CH222392A
CH222392A CH222392DA CH222392A CH 222392 A CH222392 A CH 222392A CH 222392D A CH222392D A CH 222392DA CH 222392 A CH222392 A CH 222392A
Authority
CH
Switzerland
Prior art keywords
telephone set
set circuit
circuit
telephone
Prior art date
Application number
Other languages
French (fr)
Inventor
Bell Telephone Manufac Anonyme
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
Priority claimed from US278411A external-priority patent/US2287998A/en
Application filed by Bell Telephone Mfg filed Critical Bell Telephone Mfg
Publication of CH222392A publication Critical patent/CH222392A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
CH222392D 1939-06-10 1940-10-11 Telephone set circuit. CH222392A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US278411A US2287998A (en) 1939-06-10 1939-06-10 Telephone circuit
US434372A US2332643A (en) 1939-06-10 1942-03-12 Telephone set circuit

Publications (1)

Publication Number Publication Date
CH222392A true CH222392A (en) 1942-07-15

Family

ID=26959081

Family Applications (1)

Application Number Title Priority Date Filing Date
CH222392D CH222392A (en) 1939-06-10 1940-10-11 Telephone set circuit.

Country Status (5)

Country Link
US (1) US2332643A (en)
BE (1) BE439637A (en)
CH (1) CH222392A (en)
FR (1) FR866096A (en)
GB (2) GB544364A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2559778A (en) * 1948-04-02 1951-07-10 Modern Telephone Corp Intercommunication telephone system
DE886766C (en) * 1951-03-03 1953-08-17 Normalzeit G M B H Device to prevent unauthorized eavesdropping on telephone conversations
US2764731A (en) * 1953-05-06 1956-09-25 Bell Telephone Labor Inc Thermistor network
DE1016760B (en) * 1953-07-07 1957-10-03 Deutsche Bundespost Circuit arrangement for volume control in telephone subscriber connection lines
BE555288A (en) * 1956-03-29
US3143700A (en) * 1960-08-12 1964-08-04 Computing Devices Canada Resistance networks for stabilizing phase shift in resolvers and the like

Also Published As

Publication number Publication date
BE439637A (en)
GB542643A (en) 1942-01-21
FR866096A (en) 1941-06-16
GB544364A (en) 1942-04-09
US2332643A (en) 1943-10-26

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