FR638086A - Loud speaker - Google Patents

Loud speaker

Info

Publication number
FR638086A
FR638086A FR638086DA FR638086A FR 638086 A FR638086 A FR 638086A FR 638086D A FR638086D A FR 638086DA FR 638086 A FR638086 A FR 638086A
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 FR638086A publication Critical patent/FR638086A/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
    • H04R7/12—Non-planar diaphragms or cones

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
FR638086D 1926-07-24 1927-07-21 Loud speaker Expired FR638086A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US274847XA 1926-07-24 1926-07-24

Publications (1)

Publication Number Publication Date
FR638086A true FR638086A (en) 1928-05-15

Family

ID=21837996

Family Applications (1)

Application Number Title Priority Date Filing Date
FR638086D Expired FR638086A (en) 1926-07-24 1927-07-21 Loud speaker

Country Status (3)

Country Link
FR (1) FR638086A (en)
GB (1) GB274847A (en)
NL (1) NL22116C (en)

Also Published As

Publication number Publication date
GB274847A (en) 1928-02-02
NL22116C (en)

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