GB385400A - Improvements in or relating to permanent magnets - Google Patents
Improvements in or relating to permanent magnetsInfo
- Publication number
- GB385400A GB385400A GB3141831A GB3141831A GB385400A GB 385400 A GB385400 A GB 385400A GB 3141831 A GB3141831 A GB 3141831A GB 3141831 A GB3141831 A GB 3141831A GB 385400 A GB385400 A GB 385400A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- carriers
- disposed
- polepiece
- speakers
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
- H04R2209/022—Aspects regarding the stray flux internal or external to the magnetic circuit, e.g. shielding, shape of magnetic circuit, flux compensation coils
Abstract
385,400. Loud-speakers. DARWINS, Ltd. and CATHERALL, A. C., Fitzwilliam Works, Templeborough, Sheffield. Nov. 13, 1931, No. 31418. [Class 40 (iv).] A permanent magnet system for moving-coil loud-speakers has the polepieces 20, 22, Figs. 1, 2, or their carriers 21, 23, extending radially from the annular gap 24,their outer ends being joined by one or more magnets 25 disposed in a plane at right-angles to the gap axis, so that the axial length of the system is reduced to the thickness of the two -carriers 21, 23, and a space between them in which is disposed the magnet 25. The magnet 25 may be semicircular, Figs. 3, 4 (not. shown), or circular with the polepiece carriers disposed diametrally , Figs. 5, 6, 10, 11 (not shown). Alternatively, the polepiece carrier 21, Figs, 7, 8, may be integral with the magnet 25, the carrier 23 being mounted on an upstanding projection of the magnet. The carriers may be cranked, Figs. 14, 15, 16, 17 (not shown), or the magnet may be bent so that the carriers may be straight, Figs. 12, 13 (not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3141831A GB385400A (en) | 1931-11-13 | 1931-11-13 | Improvements in or relating to permanent magnets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3141831A GB385400A (en) | 1931-11-13 | 1931-11-13 | Improvements in or relating to permanent magnets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB385400A true GB385400A (en) | 1932-12-29 |
Family
ID=10322814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3141831A Expired GB385400A (en) | 1931-11-13 | 1931-11-13 | Improvements in or relating to permanent magnets |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB385400A (en) |
-
1931
- 1931-11-13 GB GB3141831A patent/GB385400A/en not_active Expired
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