GB288711A - Improvements in sound reproducing apparatus - Google Patents
Improvements in sound reproducing apparatusInfo
- Publication number
- GB288711A GB288711A GB86127A GB86127A GB288711A GB 288711 A GB288711 A GB 288711A GB 86127 A GB86127 A GB 86127A GB 86127 A GB86127 A GB 86127A GB 288711 A GB288711 A GB 288711A
- Authority
- GB
- United Kingdom
- Prior art keywords
- light
- sound
- stylus
- photo
- intensity
- 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
Abstract
288,711. British Thomson-Houston Co., Ltd., and Hutt, J. Jan. 11, 1927, Gramophone pick - ups; transmitters in which a sound - controlled light-beam acts on a photo-electric element.- In reproducing sound from records a beam of light from a source 1, Fig. 1, is directed to an acute angle on to a photoelectric element 2 which is vibrated by a stylus 5 from the record 8, thereby varying the intensity of illumination of the element in accordance with the recorded sound. Current variations thus produced in the element, amplified if necessary, are employed to operate a sound emitting apparatus, and a potentiometer may be provided in the output circuit leading to an amplifier to regulate the volume. The variations of light intensity on the photo-electric element may be increased by arranging a grid 11, Fig. 2, composed of parallel plates, or a perforated screen, over the element 10. According to the Provisional Specification, the stylus may carry a mirror to reflect the light on to a photoelectric cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB86127A GB288711A (en) | 1927-01-11 | 1927-01-11 | Improvements in sound reproducing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB86127A GB288711A (en) | 1927-01-11 | 1927-01-11 | Improvements in sound reproducing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB288711A true GB288711A (en) | 1928-04-11 |
Family
ID=9711766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB86127A Expired GB288711A (en) | 1927-01-11 | 1927-01-11 | Improvements in sound reproducing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB288711A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3325603A (en) * | 1963-02-20 | 1967-06-13 | Rabinow Jacob | Stereo record player using optical means separate from the tone arm |
| US10304479B2 (en) * | 2017-07-24 | 2019-05-28 | Logan Riley | System, device, and method for wireless audio transmission |
| US10553246B2 (en) | 2017-07-24 | 2020-02-04 | Logan Riley | Systems and methods for reading phonographic record data |
-
1927
- 1927-01-11 GB GB86127A patent/GB288711A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3325603A (en) * | 1963-02-20 | 1967-06-13 | Rabinow Jacob | Stereo record player using optical means separate from the tone arm |
| US10304479B2 (en) * | 2017-07-24 | 2019-05-28 | Logan Riley | System, device, and method for wireless audio transmission |
| US10553246B2 (en) | 2017-07-24 | 2020-02-04 | Logan Riley | Systems and methods for reading phonographic record data |
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