GB402821A - Improvements in or relating to permanent magnets - Google Patents
Improvements in or relating to permanent magnetsInfo
- Publication number
- GB402821A GB402821A GB1638032A GB1638032A GB402821A GB 402821 A GB402821 A GB 402821A GB 1638032 A GB1638032 A GB 1638032A GB 1638032 A GB1638032 A GB 1638032A GB 402821 A GB402821 A GB 402821A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piece
- ring
- magnet
- inner pole
- pole
- 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)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Magnetic Resonance Imaging Apparatus (AREA)
Abstract
402,821. Loud-speakers. JESSOP & SONS, Ltd., W., and GOULD, J. E., Brightside Works, Sheffield. June 10, 1932, Nos. 16380/32 and 6249/33. [Class 40 (iv).] Magnets with annular air gaps, such as are employed in loud - speakers &c., are so formed that the portion or portions of the mean flux path near the neutral point lie in a plane perpendicular to the axis of the air gap. One form of such magnet is shown in Figs. 1 and 3. A rectangular ring 1 forms the body of the magnet and has at one side an inward projection 2 with an upturned end 3 forming the inner pole piece. On the other side of the ring is an upturned projection 4 carrying a plate 5 forming the outer pole-piece. The plate 5 is supported by a bracket 6 of non-magnetic material. Figs. 4 and 5 show a magnet with a body formed of a ring of non-magnetic material with a diametrical bar 2 carrying the inner pole-piece 3. The outer pole-piece is formed by a bar 5 supported on projections 4 on the ring 1. Modifications of this form are described in which the bars 2 and 5 are of arched form and in which they are both integral with the body 1 and the inner pole-piece 3 is separate. Reference has been ducted by the Comptroller to Specification 395,361.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1638032A GB402821A (en) | 1932-06-10 | 1932-06-10 | Improvements in or relating to permanent magnets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1638032A GB402821A (en) | 1932-06-10 | 1932-06-10 | Improvements in or relating to permanent magnets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB402821A true GB402821A (en) | 1933-12-11 |
Family
ID=10076264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1638032A Expired GB402821A (en) | 1932-06-10 | 1932-06-10 | Improvements in or relating to permanent magnets |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB402821A (en) |
-
1932
- 1932-06-10 GB GB1638032A patent/GB402821A/en not_active Expired
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