FR502436A - Récepteur téléphonique à polarité unique - Google Patents

Récepteur téléphonique à polarité unique

Info

Publication number
FR502436A
FR502436A FR502436A FR502436DA FR502436A FR 502436 A FR502436 A FR 502436A FR 502436 A FR502436 A FR 502436A FR 502436D A FR502436D A FR 502436DA FR 502436 A FR502436 A FR 502436A
Authority
FR
France
Prior art keywords
telephone receiver
single polarity
polarity
telephone
receiver
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
FR502436A
Other languages
English (en)
Inventor
Alexandre Vaugean
Anthony De Lavandeyra
William Garthwaite
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR502436A publication Critical patent/FR502436A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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)
FR502436A 1915-09-04 1915-09-04 Récepteur téléphonique à polarité unique Expired FR502436A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR502436T 1915-09-04

Publications (1)

Publication Number Publication Date
FR502436A true FR502436A (fr) 1920-05-14

Family

ID=8906363

Family Applications (1)

Application Number Title Priority Date Filing Date
FR502436A Expired FR502436A (fr) 1915-09-04 1915-09-04 Récepteur téléphonique à polarité unique

Country Status (1)

Country Link
FR (1) FR502436A (fr)

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