FR545314A - Improvements to vibrating call devices in telephony - Google Patents

Improvements to vibrating call devices in telephony

Info

Publication number
FR545314A
FR545314A FR545314DA FR545314A FR 545314 A FR545314 A FR 545314A FR 545314D A FR545314D A FR 545314DA FR 545314 A FR545314 A FR 545314A
Authority
FR
France
Prior art keywords
telephony
call devices
vibrating call
vibrating
devices
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
Other languages
French (fr)
Inventor
Andre Hardy
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.)
TELEGRAPHIE ET DE TELEPHONIE S
Original Assignee
TELEGRAPHIE ET DE TELEPHONIE S
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 TELEGRAPHIE ET DE TELEPHONIE S filed Critical TELEGRAPHIE ET DE TELEPHONIE S
Application granted granted Critical
Publication of FR545314A publication Critical patent/FR545314A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
FR545314D 1920-03-26 1920-03-26 Improvements to vibrating call devices in telephony Expired FR545314A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR545314T 1920-03-26

Publications (1)

Publication Number Publication Date
FR545314A true FR545314A (en) 1922-10-10

Family

ID=8932883

Family Applications (1)

Application Number Title Priority Date Filing Date
FR545314D Expired FR545314A (en) 1920-03-26 1920-03-26 Improvements to vibrating call devices in telephony

Country Status (1)

Country Link
FR (1) FR545314A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741158C (en) * 1937-01-30 1943-11-05 Lorenz C Ag Call inductor with non-displaceable drive axis for telephone systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE741158C (en) * 1937-01-30 1943-11-05 Lorenz C Ag Call inductor with non-displaceable drive axis for telephone systems

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