GB1494593A - Acoustic transducer - Google Patents

Acoustic transducer

Info

Publication number
GB1494593A
GB1494593A GB564376A GB564376A GB1494593A GB 1494593 A GB1494593 A GB 1494593A GB 564376 A GB564376 A GB 564376A GB 564376 A GB564376 A GB 564376A GB 1494593 A GB1494593 A GB 1494593A
Authority
GB
United Kingdom
Prior art keywords
diaphragm
conductors
clamped
centre
polarity
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
GB564376A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1494593A publication Critical patent/GB1494593A/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/046—Construction
    • H04R9/047—Construction in which the windings of the moving coil lay in the same plane

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

1494593 Acoustic transducers T SAWAFUJI 12 Feb 1976 05643/76 Heading H4J An acoustic transducer comprises a diaphragm with electric conductors thereon clamped at its edges between a pair of magnetic discs having their centre portions of one polarity and their peripheral portions of the opposite polarity. The transducer may be a microphone, earphone, headphone or telephone. The diaphragm is a polyethylene film 15 with copper or aluminium conductors 14 printed or vacuum evaporated thereon. The conductors on opposite faces of the diaphragm are interconnected through the centre of the disc by an eyelet 23. The diaphragm is rim clamped by nickel plated copper terminal rings 21, 22 and insulated by rubber bonded fibre packing washers 9 from the ferrite magnet discs 7, 8. The assembly is enclosed in a casing comprising two screens 24 and a metal or plastics perimeter wall 25 the top edge of which is bent or spun inwardly after the components have been inserted.
GB564376A 1976-01-30 1976-02-12 Acoustic transducer Expired GB1494593A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7602687A FR2340013A1 (en) 1976-01-30 1976-01-30 ELECTROMAGNETIC ACOUSTIC TRANSDUCER

Publications (1)

Publication Number Publication Date
GB1494593A true GB1494593A (en) 1977-12-07

Family

ID=9168608

Family Applications (1)

Application Number Title Priority Date Filing Date
GB564376A Expired GB1494593A (en) 1976-01-30 1976-02-12 Acoustic transducer

Country Status (2)

Country Link
FR (1) FR2340013A1 (en)
GB (1) GB1494593A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154096A (en) * 1984-02-08 1985-08-29 Chien Yuan Liu Loudspeaker
FR2766650A1 (en) * 1997-07-23 1999-01-29 Technofirst LINEAR SPEAKER
EP1883271A1 (en) * 2006-07-27 2008-01-30 Star Micronics Co., Ltd. Microphone case and condenser microphone

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154096A (en) * 1984-02-08 1985-08-29 Chien Yuan Liu Loudspeaker
FR2766650A1 (en) * 1997-07-23 1999-01-29 Technofirst LINEAR SPEAKER
WO1999005888A1 (en) * 1997-07-23 1999-02-04 Technofirst Linear loudspeaker
US6285773B1 (en) 1997-07-23 2001-09-04 Technofirst Linear loudspeaker
EP1883271A1 (en) * 2006-07-27 2008-01-30 Star Micronics Co., Ltd. Microphone case and condenser microphone

Also Published As

Publication number Publication date
FR2340013A1 (en) 1977-08-26
FR2340013B1 (en) 1982-05-21

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Legal Events

Date Code Title Description
414F Notice of opposition given (sect. 14/1949)
414A Case decided by the comptroller ** specification amended (sect. 14/1949)
49R Reference inserted (sect. 9/1949)
SP Amendment (slips) printed
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee