GB858977A - Improvements in or relating to magnetic structures including a permanent magnet - Google Patents
Improvements in or relating to magnetic structures including a permanent magnetInfo
- Publication number
- GB858977A GB858977A GB1819758A GB1819758A GB858977A GB 858977 A GB858977 A GB 858977A GB 1819758 A GB1819758 A GB 1819758A GB 1819758 A GB1819758 A GB 1819758A GB 858977 A GB858977 A GB 858977A
- Authority
- GB
- United Kingdom
- Prior art keywords
- permanent magnet
- relating
- sintered
- structures including
- magnetic structures
- 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
858,977. Magnets. ROLA CELESTION Ltd. Aug. 31, 1959 [June 6, 1958], No. 18197/58. Class 35. A permanent magnet structure, e.g. for a loudspeaker, comprises a member 10 of sintered powder construction having a first part 12 of permanentlymagnetized material and an integral second part 11 of non-retentive material by which it is welded at W to a yoke member 13. The member 10 is produced in a mould, a thin layer of powdered soft-iron for the part 11 being placed in first, followed by the powdered permanently-magnetizable material (not named), the whole being then compressed and sintered. The portion of the magnet 10 opposite the air gap 16 may also be of sintered soft iron.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1819758A GB858977A (en) | 1958-06-06 | 1958-06-06 | Improvements in or relating to magnetic structures including a permanent magnet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1819758A GB858977A (en) | 1958-06-06 | 1958-06-06 | Improvements in or relating to magnetic structures including a permanent magnet |
Publications (1)
Publication Number | Publication Date |
---|---|
GB858977A true GB858977A (en) | 1961-01-18 |
Family
ID=10108315
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1819758A Expired GB858977A (en) | 1958-06-06 | 1958-06-06 | Improvements in or relating to magnetic structures including a permanent magnet |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB858977A (en) |
-
1958
- 1958-06-06 GB GB1819758A patent/GB858977A/en not_active Expired
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