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FR588290A - Improvements to telephone transmitters and receivers - Google Patents

Improvements to telephone transmitters and receivers

Info

Publication number
FR588290A
FR588290A FR588290DA FR588290A FR 588290 A FR588290 A FR 588290A FR 588290D A FR588290D A FR 588290DA FR 588290 A FR588290 A FR 588290A
Authority
FR
France
Prior art keywords
receivers
telephone transmitters
transmitters
telephone
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)
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston SA
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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR588290A publication Critical patent/FR588290A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
    • H04R13/02—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR588290D 1923-11-14 1924-10-14 Improvements to telephone transmitters and receivers Expired FR588290A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB588290X 1923-11-14

Publications (1)

Publication Number Publication Date
FR588290A true FR588290A (en) 1925-05-04

Family

ID=10482500

Family Applications (1)

Application Number Title Priority Date Filing Date
FR588290D Expired FR588290A (en) 1923-11-14 1924-10-14 Improvements to telephone transmitters and receivers

Country Status (1)

Country Link
FR (1) FR588290A (en)

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