GB325227A - Improvements in or relating to electro-acoustic devices such as loud-speakers - Google Patents
Improvements in or relating to electro-acoustic devices such as loud-speakersInfo
- Publication number
- GB325227A GB325227A GB3306628A GB3306628A GB325227A GB 325227 A GB325227 A GB 325227A GB 3306628 A GB3306628 A GB 3306628A GB 3306628 A GB3306628 A GB 3306628A GB 325227 A GB325227 A GB 325227A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- cross
- reed
- bar
- pole pieces
- 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
- H04R11/00—Transducers of moving-armature or moving-core type
Abstract
325,227. British Thomson-Houston Co., Ltd., and Arkell, F. G. Nov. 12, 1928. Magnetic instruments. - An electromagnetic vibratory mechanism has a vibratory member cooperating with one or more magnet poles, the vibratory member being secured at one end to an elastic member, part of which is fixed with respect to the magnet and which can be distorted to provide independent adjustment. of position and angle of the vibratory member relative to the pole pieces. A permanent magnet 1, has pole pieces 2 screwed thereon surrounded by the speech coils 3. The reed 4 is mounted on a cross-bar 5 which is fixed to the magnet by bolts 8 passing through a cross-bar 6 on the lower side of the magnet 1. To these cross-bars are attached plates 11, 12 of which the plate 12 is provided with screws 13, 14 bearing on the plate 11 which permit the adjustment of the inclination of the reed and its separation from the pole pieces by elastically straining the cross-bar 5 at its narrowed portions 9. By moving the cross-bars 5, 6 along the magnet, the distance between the fixed end of the reed and the poles may be varied. The Provisional Specification refers to Specification 293,131.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3306628A GB325227A (en) | 1928-11-12 | 1928-11-12 | Improvements in or relating to electro-acoustic devices such as loud-speakers |
| DEA59624D DE567611C (en) | 1928-11-12 | 1929-11-13 | Device for regulating the air gap width and the inclined position of the armature in relation to the poles for electromagnetic loudspeaker drives |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3306628A GB325227A (en) | 1928-11-12 | 1928-11-12 | Improvements in or relating to electro-acoustic devices such as loud-speakers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB325227A true GB325227A (en) | 1930-02-12 |
Family
ID=10348091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3306628A Expired GB325227A (en) | 1928-11-12 | 1928-11-12 | Improvements in or relating to electro-acoustic devices such as loud-speakers |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE567611C (en) |
| GB (1) | GB325227A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE844463C (en) * | 1940-02-13 | 1952-07-21 | Normalzeit G M B H | Device for setting the anchor of an electromagnetic microphone or telephone system |
-
1928
- 1928-11-12 GB GB3306628A patent/GB325227A/en not_active Expired
-
1929
- 1929-11-13 DE DEA59624D patent/DE567611C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE567611C (en) | 1933-01-06 |
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