FR653092A - Perfectionnements aux appareils acoustiques - Google Patents

Perfectionnements aux appareils acoustiques

Info

Publication number
FR653092A
FR653092A FR653092DA FR653092A FR 653092 A FR653092 A FR 653092A FR 653092D A FR653092D A FR 653092DA FR 653092 A FR653092 A FR 653092A
Authority
FR
France
Prior art keywords
hearing devices
hearing
devices
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
English (en)
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi Co Ltd
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
Priority claimed from GB1086027A external-priority patent/GB294285A/en
Application filed by Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Application granted granted Critical
Publication of FR653092A publication Critical patent/FR653092A/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; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/045—Mounting

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
FR653092D 1927-04-22 1928-04-19 Perfectionnements aux appareils acoustiques Expired FR653092A (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1086027A GB294285A (en) 1928-01-07 1927-04-22 Improvements in or relating to electro-acoustic devices
GB60228A GB309226A (en) 1928-01-07 1928-01-07 Improvements in or relating to acoustic devices

Publications (1)

Publication Number Publication Date
FR653092A true FR653092A (fr) 1929-03-15

Family

ID=26236054

Family Applications (2)

Application Number Title Priority Date Filing Date
FR653092D Expired FR653092A (fr) 1927-04-22 1928-04-19 Perfectionnements aux appareils acoustiques
FR666922D Expired FR666922A (fr) 1927-04-22 1929-01-04 Perfectionnements aux appareils acoustiques

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR666922D Expired FR666922A (fr) 1927-04-22 1929-01-04 Perfectionnements aux appareils acoustiques

Country Status (4)

Country Link
US (2) US2002189A (nl)
BE (2) BE357157A (nl)
FR (2) FR653092A (nl)
NL (1) NL28724C (nl)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2469773A (en) * 1934-06-04 1949-05-10 Jensen Mfg Company Loud-speaker diaphragm support member
US2513171A (en) * 1948-11-26 1950-06-27 Fauthal A Hassan Loud-speaker diaphragm with stiffening struts
GB698695A (en) * 1951-01-11 1953-10-21 Lustraphone Ltd Improvements in or relating to microphones
US4239943A (en) * 1977-11-17 1980-12-16 Cerwin Vega, Inc. Adjustable dual spider for a loudspeaker
US4373607A (en) * 1979-08-03 1983-02-15 Miller Charles D Loudspeaker cone stiffeners
US5123053A (en) * 1990-07-11 1992-06-16 Harman International Industries, Incorporated Loudspeaker suspension
US6611604B1 (en) 1999-10-22 2003-08-26 Stillwater Designs & Audio, Inc. Ultra low frequency transducer and loud speaker comprising same

Also Published As

Publication number Publication date
US2002190A (en) 1935-05-21
FR666922A (fr) 1929-10-08
BE357157A (nl)
US2002189A (en) 1935-05-21
BE350724A (nl)
NL28724C (nl)

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