GB237402A - Improvements in the design of magnets and pole shoes, as used in wireless headphonesand the like - Google Patents
Improvements in the design of magnets and pole shoes, as used in wireless headphonesand the likeInfo
- Publication number
- GB237402A GB237402A GB1400824A GB1400824A GB237402A GB 237402 A GB237402 A GB 237402A GB 1400824 A GB1400824 A GB 1400824A GB 1400824 A GB1400824 A GB 1400824A GB 237402 A GB237402 A GB 237402A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pieces
- pole
- magnet
- headphonesand
- magnets
- 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
- H04R13/00—Transducers having an acoustic diaphragm of magnetisable material directly co-acting with electromagnet
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
237,402. Bull, H. W. June 10, 1924. No Patent granted (Sealing fee not paid). Magnetic instruments.-A magnet for use in a. telephone receiver is formed from a 1-shaped blank, which may be in the form either of a single steel stamping or of a rectangular stamping m, Fig. 1, to which end-pieces are welded at a and b, by first bending the end parts P to an L-shape to form the pole-pieces and then bending the part m to a semicircular shape, Fig. 3, to constitute the magnet proper, thus bringing the broad faces of the pole-pieces opposite to each other, while the parts P<1> between the pole-pieces and magnet proper project below the edge of the magnet proper as shown in Fig. 2. Specifications 203,121 ann 215,850 are referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1400824A GB237402A (en) | 1924-06-10 | 1924-06-10 | Improvements in the design of magnets and pole shoes, as used in wireless headphonesand the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1400824A GB237402A (en) | 1924-06-10 | 1924-06-10 | Improvements in the design of magnets and pole shoes, as used in wireless headphonesand the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB237402A true GB237402A (en) | 1925-07-30 |
Family
ID=10033325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1400824A Expired GB237402A (en) | 1924-06-10 | 1924-06-10 | Improvements in the design of magnets and pole shoes, as used in wireless headphonesand the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB237402A (en) |
-
1924
- 1924-06-10 GB GB1400824A patent/GB237402A/en not_active Expired
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