FR638334A - Improvements to diaphragms for phonographs and other applications - Google Patents

Improvements to diaphragms for phonographs and other applications

Info

Publication number
FR638334A
FR638334A FR638334DA FR638334A FR 638334 A FR638334 A FR 638334A FR 638334D A FR638334D A FR 638334DA FR 638334 A FR638334 A FR 638334A
Authority
FR
France
Prior art keywords
phonographs
diaphragms
applications
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.)
Electrical Research Products Inc
Original Assignee
Electrical Research Products Inc
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 Electrical Research Products Inc filed Critical Electrical Research Products Inc
Application granted granted Critical
Publication of FR638334A publication Critical patent/FR638334A/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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR638334D 1927-07-27 1927-07-27 Improvements to diaphragms for phonographs and other applications Expired FR638334A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR638334T 1927-07-27

Publications (1)

Publication Number Publication Date
FR638334A true FR638334A (en) 1928-05-22

Family

ID=8995918

Family Applications (1)

Application Number Title Priority Date Filing Date
FR638334D Expired FR638334A (en) 1927-07-27 1927-07-27 Improvements to diaphragms for phonographs and other applications

Country Status (1)

Country Link
FR (1) FR638334A (en)

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