GB288801A - Improved sound reproducing attachment for gramophones and like sound reproducing apparatus - Google Patents
Improved sound reproducing attachment for gramophones and like sound reproducing apparatusInfo
- Publication number
- GB288801A GB288801A GB814927A GB814927A GB288801A GB 288801 A GB288801 A GB 288801A GB 814927 A GB814927 A GB 814927A GB 814927 A GB814927 A GB 814927A GB 288801 A GB288801 A GB 288801A
- Authority
- GB
- United Kingdom
- Prior art keywords
- poles
- armature
- sound reproducing
- transversely
- small
- 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
- H04R11/08—Gramophone pick-ups using a stylus; Recorders using a stylus
Abstract
288,801. Brown, A. M. H. R., and Brown, Ltd., S. G. March 24, 1927. Gramophone pick-ups; magnetic instruntents. - An electromagnetic attachment for sound-reproducing apparatus comprises a magnet C which carries a coil or coils C1 and has immediately over its poles a small armature D mounted resiliently at both ends and oscillated transversely to its length by a connection d to a rocking member B carrying the reproducing needle or stylus. The magnet is of horse-shoe or nearly circular form with coils mounted near the poles which are closely adjacent to each other leaving a small gap over which the armature extends a short distance above the poles, The armature is arranged transversely to the pole pieces and is mounted on supporting posts D1 between small resilient washers or pads D2. The distance between the armature and the poles is regulated by adjustment of nuts D3 which hold the washers. The connection d consists of a thin metal strip, flexible transversely but sufficiently rigid lougitudinally to transmit vibrations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB814927A GB288801A (en) | 1927-03-24 | 1927-03-24 | Improved sound reproducing attachment for gramophones and like sound reproducing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB814927A GB288801A (en) | 1927-03-24 | 1927-03-24 | Improved sound reproducing attachment for gramophones and like sound reproducing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB288801A true GB288801A (en) | 1928-04-19 |
Family
ID=9846681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB814927A Expired GB288801A (en) | 1927-03-24 | 1927-03-24 | Improved sound reproducing attachment for gramophones and like sound reproducing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB288801A (en) |
-
1927
- 1927-03-24 GB GB814927A patent/GB288801A/en not_active Expired
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