GB975983A - Improvements in and relating to sound transmitting instruments - Google Patents
Improvements in and relating to sound transmitting instrumentsInfo
- Publication number
- GB975983A GB975983A GB2072762A GB2072762A GB975983A GB 975983 A GB975983 A GB 975983A GB 2072762 A GB2072762 A GB 2072762A GB 2072762 A GB2072762 A GB 2072762A GB 975983 A GB975983 A GB 975983A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core
- plate
- magnet
- ring
- secured
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Abstract
975,983. Transducers. BLAUPUNKTWERKE G.m.b.H. May 30, 1962 [July 1, 1961], No. 20727/62. Heading H4J. In a method of constructing the magnet system of a moving coil-type transducer, a mild steel core 2 (Fig. 1), is attached to a mild steel plate 1 and a centering ring 3 is then slid on to the end of the core, thereafter an annular, permanent magnet 4 is secured to plate 1 and an apertured mild steel plate 6 is secured to the magnet, finally ring 3 is pushed along the core to leave an air gap between the core and the plate 6 (Fig. 2, not shown). The ring is retained in the system by means of a bead and groove 11 and 10 or by means of an increased diameter of core at the lower end thereof which results in a forced fit. The plates 1 and 6 are secured to the magnet by an adhesive, e.g. an ethoxylene resin and the ring is made of synthetic resin such as a polypropylene or a polycarbonate. The centering ring may be of channel section (Fig. 5) in which case the inner edge 12 thereof is pushed down the core after plate 6 has been properly orientated with respect to the core, the outer edge remaining wedged between the magnet and plate 6.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEB0045713 | 1961-07-01 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB975983A true GB975983A (en) | 1964-11-25 |
Family
ID=6967710
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2072762A Expired GB975983A (en) | 1961-07-01 | 1962-05-30 | Improvements in and relating to sound transmitting instruments |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB975983A (en) |
| NL (1) | NL280363A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3898393A (en) * | 1974-02-04 | 1975-08-05 | Clifford B Digre | Magnet centering device and shield |
-
0
- NL NL280363D patent/NL280363A/xx unknown
-
1962
- 1962-05-30 GB GB2072762A patent/GB975983A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3898393A (en) * | 1974-02-04 | 1975-08-05 | Clifford B Digre | Magnet centering device and shield |
Also Published As
| Publication number | Publication date |
|---|---|
| NL280363A (en) |
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