GB1423842A - Transducers - Google Patents

Transducers

Info

Publication number
GB1423842A
GB1423842A GB4913872A GB4913872A GB1423842A GB 1423842 A GB1423842 A GB 1423842A GB 4913872 A GB4913872 A GB 4913872A GB 4913872 A GB4913872 A GB 4913872A GB 1423842 A GB1423842 A GB 1423842A
Authority
GB
United Kingdom
Prior art keywords
voice coil
coil
moulding
oct
turns
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
GB4913872A
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.)
Rank Organization Ltd
Original Assignee
Rank Organization 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
Application filed by Rank Organization Ltd filed Critical Rank Organization Ltd
Priority to GB4913872A priority Critical patent/GB1423842A/en
Priority to DE19732353301 priority patent/DE2353301A1/en
Priority to JP11950973A priority patent/JPS4996714A/ja
Publication of GB1423842A publication Critical patent/GB1423842A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

1423842 Injection moulding coils RANK ORGANISATION Ltd 25 Oct 1973 [25 Oct 1972] 49138/72 Heading B5A [Also in Division H4] A voice coil for an electro-acoustic transducer, such as a loud-speaker, comprises a plurality of turns of insulated wire, the wire being encapsulated in a setting material provided with a filler to improve the thermal conductivity thereof. Thermosetting material such as phenolic resin or glass-filled epoxide resin is preferably used. In manufacture, a voice coil winding is formed and is located in the mould cavity of an injection moulding machine on a mandrel which is preferably of the expanding type to ensure that the roundness of the coil is maintained and that the coil does not move during moulding. The mould cavity is cooled with water so that material bonding the turns of the voice coil together prior to moulding, or the material of a former, is not deleteriously affected by temperature.
GB4913872A 1972-10-25 1972-10-25 Transducers Expired GB1423842A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB4913872A GB1423842A (en) 1972-10-25 1972-10-25 Transducers
DE19732353301 DE2353301A1 (en) 1972-10-25 1973-10-24 ELECTROACOUSTIC CONVERTER
JP11950973A JPS4996714A (en) 1972-10-25 1973-10-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4913872A GB1423842A (en) 1972-10-25 1972-10-25 Transducers

Publications (1)

Publication Number Publication Date
GB1423842A true GB1423842A (en) 1976-02-04

Family

ID=10451305

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4913872A Expired GB1423842A (en) 1972-10-25 1972-10-25 Transducers

Country Status (3)

Country Link
JP (1) JPS4996714A (en)
DE (1) DE2353301A1 (en)
GB (1) GB1423842A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5156619A (en) * 1974-11-14 1976-05-18 Sony Corp SUPIIKA
FR2572615B1 (en) * 1984-10-29 1988-10-14 Bertin & Cie PNEUMATIC SPEAKER WITH CONTINUOUS FLOW PRESSURE FLOW
JPH01119297U (en) * 1988-02-05 1989-08-11
AT404206B (en) * 1996-11-20 1998-09-25 Harman Int Ind METHOD FOR PRODUCING COILS

Also Published As

Publication number Publication date
DE2353301A1 (en) 1974-05-16
JPS4996714A (en) 1974-09-12

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee