GB377752A - Loudspeakers - Google Patents

Loudspeakers

Info

Publication number
GB377752A
GB377752A GB1311831A GB1311831A GB377752A GB 377752 A GB377752 A GB 377752A GB 1311831 A GB1311831 A GB 1311831A GB 1311831 A GB1311831 A GB 1311831A GB 377752 A GB377752 A GB 377752A
Authority
GB
United Kingdom
Prior art keywords
polepiece
coil
plate
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
GB1311831A
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.)
KARL ADOLPH HEYUM
MAGNAVOX GREAT BRITAIN Ltd
Original Assignee
KARL ADOLPH HEYUM
MAGNAVOX GREAT BRITAIN 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 KARL ADOLPH HEYUM, MAGNAVOX GREAT BRITAIN Ltd filed Critical KARL ADOLPH HEYUM
Priority to GB1311831A priority Critical patent/GB377752A/en
Priority to FR736576D priority patent/FR736576A/en
Priority to DEM119683D priority patent/DE624703C/en
Publication of GB377752A publication Critical patent/GB377752A/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
    • H04R9/025—Magnetic circuit

Landscapes

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

Abstract

377,752. Loud - speakers. HEYUM, K. A. and MAGNAVOX (GREAT BRITAIN), Ltd., 89, Kingsway, London. May 4,1931, No. 13118. [Class 40 (iv).] A moving coil loud-speaker is provided with a permanent magnet 5 consisting of a plate bent to M formation, the outer polepiece 4 consisting of a plate bridging the end extremities of the M whilst the cylindrical inner polepiece 3 is formed with an integral rectangular base 3a held against the centre apex of the M by a non-magnetic centring plate 8 carried by the outer polepiece. A metal strap 7 secures the magnet to the outer polepiece, which is carried by a sheet-metal frame 6 to the outer edge of which the periphery of a conical diaphragm 1 is clamped by an angle section ring 14 in which is mounted a felt ring 15 to enable the loud-speaker to be mounted against the usual baffle. The inner end of the cone 1 carries a coil 2 which is centred in the gap between the polepieces by means of a flexible element 9 secured to the coil former and to raised portions of a plate 10 rigidly mounted on the outer polepiece. The leads 11 from the coil are connected to a terminal support 12 mounted on the frame 6 across one of the openings 13 therein.
GB1311831A 1931-05-04 1931-05-04 Loudspeakers Expired GB377752A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1311831A GB377752A (en) 1931-05-04 1931-05-04 Loudspeakers
FR736576D FR736576A (en) 1931-05-04 1932-05-03 Speakers
DEM119683D DE624703C (en) 1931-05-04 1932-05-04 Electrodynamic loudspeaker with permanent M-shaped magnet system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1311831A GB377752A (en) 1931-05-04 1931-05-04 Loudspeakers

Publications (1)

Publication Number Publication Date
GB377752A true GB377752A (en) 1932-08-04

Family

ID=10017145

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1311831A Expired GB377752A (en) 1931-05-04 1931-05-04 Loudspeakers

Country Status (3)

Country Link
DE (1) DE624703C (en)
FR (1) FR736576A (en)
GB (1) GB377752A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0326714Y2 (en) * 1986-02-24 1991-06-10
JPS63212296A (en) * 1987-02-27 1988-09-05 Pioneer Electronic Corp Speaker system

Also Published As

Publication number Publication date
DE624703C (en) 1936-01-27
FR736576A (en) 1932-11-25

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