FR641542A - Improvement in telephone membranes - Google Patents

Improvement in telephone membranes

Info

Publication number
FR641542A
FR641542A FR641542DA FR641542A FR 641542 A FR641542 A FR 641542A FR 641542D A FR641542D A FR 641542DA FR 641542 A FR641542 A FR 641542A
Authority
FR
France
Prior art keywords
membranes
telephone
improvement
telephone membranes
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.)
Neufeldt & Kuhnke Betr Sgesell
Original Assignee
Neufeldt & Kuhnke Betr Sgesell
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 Neufeldt & Kuhnke Betr Sgesell filed Critical Neufeldt & Kuhnke Betr Sgesell
Application granted granted Critical
Publication of FR641542A publication Critical patent/FR641542A/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
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR641542D 1925-08-07 1926-08-07 Improvement in telephone membranes Expired FR641542A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE641542X 1925-08-07

Publications (1)

Publication Number Publication Date
FR641542A true FR641542A (en) 1928-08-06

Family

ID=6580135

Family Applications (1)

Application Number Title Priority Date Filing Date
FR641542D Expired FR641542A (en) 1925-08-07 1926-08-07 Improvement in telephone membranes

Country Status (1)

Country Link
FR (1) FR641542A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1359786A2 (en) * 2002-04-30 2003-11-05 Pioneer Corporation Speaker apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1359786A2 (en) * 2002-04-30 2003-11-05 Pioneer Corporation Speaker apparatus
EP1359786A3 (en) * 2002-04-30 2004-05-06 Pioneer Corporation Speaker apparatus
US6996246B2 (en) 2002-04-30 2006-02-07 Pioneer Corporation Speaker apparatus

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