GB377752A - Loudspeakers - Google Patents
LoudspeakersInfo
- 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
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.
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)
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 |
-
1931
- 1931-05-04 GB GB1311831A patent/GB377752A/en not_active Expired
-
1932
- 1932-05-03 FR FR736576D patent/FR736576A/en not_active Expired
- 1932-05-04 DE DEM119683D patent/DE624703C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR736576A (en) | 1932-11-25 |
DE624703C (en) | 1936-01-27 |
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