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FR616681A - Loud speaker - Google Patents

Loud speaker

Info

Publication number
FR616681A
FR616681A FR616681DA FR616681A FR 616681 A FR616681 A FR 616681A FR 616681D A FR616681D A FR 616681DA FR 616681 A FR616681 A FR 616681A
Authority
FR
France
Prior art keywords
loud speaker
loud
speaker
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.)
HOPKINS CORP
Original Assignee
HOPKINS CORP
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 HOPKINS CORP filed Critical HOPKINS CORP
Application granted granted Critical
Publication of FR616681A publication Critical patent/FR616681A/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
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR616681D 1925-12-22 1926-05-26 Loud speaker Expired FR616681A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US616681XA 1961-04-20 1961-04-20

Publications (1)

Publication Number Publication Date
FR616681A true FR616681A (en) 1927-02-05

Family

ID=22037309

Family Applications (1)

Application Number Title Priority Date Filing Date
FR616681D Expired FR616681A (en) 1925-12-22 1926-05-26 Loud speaker

Country Status (2)

Country Link
BE (1) BE616681A (en)
FR (1) FR616681A (en)

Also Published As

Publication number Publication date
BE616681A (en) 1962-08-16

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