GB652678A - Improvements in and relating to loudspeakers of the moving coil type - Google Patents
Improvements in and relating to loudspeakers of the moving coil typeInfo
- Publication number
- GB652678A GB652678A GB1965847A GB1965847A GB652678A GB 652678 A GB652678 A GB 652678A GB 1965847 A GB1965847 A GB 1965847A GB 1965847 A GB1965847 A GB 1965847A GB 652678 A GB652678 A GB 652678A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- polepieces
- secured
- polepiece
- permanent magnet
- 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
- H04R9/06—Loudspeakers
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
652,678. Magnets. BRITISH COMMUNICATIONS CORPORATION, Ltd., and DANILEWICZ, L. July 22, 1947, Nos. 19658 and 30917. [Class 35] [Also in Group XXXIX] A magnet system comprises a permanent magnet 11 secured between cup-shaped polepieces 8, 9, one polepiece embracing the other so that a radial air gap is provided between them which may be adjacent to the central plane of the magnet. As shown in Fig. 3, the polepieces and magnet are secured by a screw 16. Alternatively the polepieces may be positioned solely by the magnetic forces or additionally by means of solder or an adhesive. A non-magnetic spacing ring 19, Fig. 7, may be used to position the polepieces and may be provided with additional positioning surfaces for the permanent magnet. In the embodiment shown in Fig. 1, the permanent magnet is fitted into a recess 10 in a substantially flat central.polepiece and the assembly secured by a riveted member 12. The magnet system may be secured to a diaphragm supporting chassis 1 for a loud-speaker (see Group XXXIX), by a flange 13 on the riveted member 12 or by swaging or spinning a shouldered end 15 on the central polepiece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1965847A GB652678A (en) | 1947-07-22 | 1947-07-22 | Improvements in and relating to loudspeakers of the moving coil type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1965847A GB652678A (en) | 1947-07-22 | 1947-07-22 | Improvements in and relating to loudspeakers of the moving coil type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB652678A true GB652678A (en) | 1951-05-02 |
Family
ID=10133022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1965847A Expired GB652678A (en) | 1947-07-22 | 1947-07-22 | Improvements in and relating to loudspeakers of the moving coil type |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB652678A (en) |
-
1947
- 1947-07-22 GB GB1965847A patent/GB652678A/en not_active Expired
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