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GB1259517A - - Google Patents

Info

Publication number
GB1259517A
GB1259517A GB1259517DA GB1259517A GB 1259517 A GB1259517 A GB 1259517A GB 1259517D A GB1259517D A GB 1259517DA GB 1259517 A GB1259517 A GB 1259517A
Authority
GB
United Kingdom
Prior art keywords
casing
bobbin
axial extension
coil
leads
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
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 filed Critical
Publication of GB1259517A publication Critical patent/GB1259517A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1016—Earpieces of the intra-aural type

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Headphones And Earphones (AREA)

Abstract

1,259,517. Earphones. HOSHIDENKISEIZO K.K. 12 Feb., 1969 [19 June, 1968], No. 7621/69. Heading H4J. An earphone has a cylindrical casing 1 with an axial extension of reduced diameter 1b for insertion into the ear. A coil bobbin 5 is mounted within the casing and surrounds an axially magnetized permanent magnet 8. The bobbin 5 has a radial flange 6, at the end adjacent the axial extension, terminating in a flat portion 9 on which diaphragm 7 is held by magnetic attraction assisted by annular rib 14 on the casing interior. The casing is moulded from polyethylene in two parts which snap together at 1a, 1d. An insulating plate 13 is inserted behind magnet 8 and carries conductive parts 17a, 17b to which leads from coil 11 are connected to supply leads 16. The rear of the casing assembly is filled by a sponge rubber or plastics material 15 to secure the bobbin assembly against rib 14.
GB1259517D 1968-06-19 1969-02-12 Expired GB1259517A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5226068 1968-06-19

Publications (1)

Publication Number Publication Date
GB1259517A true GB1259517A (en) 1972-01-05

Family

ID=12909774

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1259517D Expired GB1259517A (en) 1968-06-19 1969-02-12

Country Status (1)

Country Link
GB (1) GB1259517A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0188661A1 (en) * 1985-01-18 1986-07-30 Robert Bosch Gmbh Electronic hearing aid
WO2001039569A2 (en) * 2001-03-13 2001-06-07 Phonak Ag Method for establishing a detachable mechanical and/or electrical connection
US7181032B2 (en) 2001-03-13 2007-02-20 Phonak Ag Method for establishing a detachable mechanical and/or electrical connection

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0188661A1 (en) * 1985-01-18 1986-07-30 Robert Bosch Gmbh Electronic hearing aid
US4736430A (en) * 1985-01-18 1988-04-05 Robert Bosch Gmbh Hearing aid
WO2001039569A2 (en) * 2001-03-13 2001-06-07 Phonak Ag Method for establishing a detachable mechanical and/or electrical connection
WO2001039569A3 (en) * 2001-03-13 2002-05-30 Phonak Ag Method for establishing a detachable mechanical and/or electrical connection
US7181032B2 (en) 2001-03-13 2007-02-20 Phonak Ag Method for establishing a detachable mechanical and/or electrical connection

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years