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FR602147A - Improvements to telephone receivers - Google Patents

Improvements to telephone receivers

Info

Publication number
FR602147A
FR602147A FR602147DA FR602147A FR 602147 A FR602147 A FR 602147A FR 602147D A FR602147D A FR 602147DA FR 602147 A FR602147 A FR 602147A
Authority
FR
France
Prior art keywords
telephone receivers
receivers
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
Albert Henry Midgley
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 FR602147A publication Critical patent/FR602147A/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)
FR602147D 1924-08-26 1925-08-18 Improvements to telephone receivers Expired FR602147A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB602147X 1924-08-26

Publications (1)

Publication Number Publication Date
FR602147A true FR602147A (en) 1926-03-12

Family

ID=10485224

Family Applications (1)

Application Number Title Priority Date Filing Date
FR602147D Expired FR602147A (en) 1924-08-26 1925-08-18 Improvements to telephone receivers

Country Status (2)

Country Link
FR (1) FR602147A (en)
NL (1) NL17658C (en)

Also Published As

Publication number Publication date
NL17658C (en)

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