FR613355A - Improvements to telephone transmitters - Google Patents

Improvements to telephone transmitters

Info

Publication number
FR613355A
FR613355A FR613355DA FR613355A FR 613355 A FR613355 A FR 613355A FR 613355D A FR613355D A FR 613355DA FR 613355 A FR613355 A FR 613355A
Authority
FR
France
Prior art keywords
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)
Inventor
Edward Alfred Graham
Leslie Harold Paddle
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 filed Critical
Application granted granted Critical
Publication of FR613355A publication Critical patent/FR613355A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR613355D 1925-04-21 1926-03-24 Improvements to telephone transmitters Expired FR613355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB613355X 1925-04-21

Publications (1)

Publication Number Publication Date
FR613355A true FR613355A (en) 1926-11-16

Family

ID=10486879

Family Applications (1)

Application Number Title Priority Date Filing Date
FR613355D Expired FR613355A (en) 1925-04-21 1926-03-24 Improvements to telephone transmitters

Country Status (2)

Country Link
BE (1) BE333008A (en)
FR (1) FR613355A (en)

Also Published As

Publication number Publication date
BE333008A (en)

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