GB335511A - Improvements in systems for reproduction of sound from optical sound records - Google Patents
Improvements in systems for reproduction of sound from optical sound recordsInfo
- Publication number
- GB335511A GB335511A GB23793/30A GB2379330A GB335511A GB 335511 A GB335511 A GB 335511A GB 23793/30 A GB23793/30 A GB 23793/30A GB 2379330 A GB2379330 A GB 2379330A GB 335511 A GB335511 A GB 335511A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- sound
- reproduction
- roller
- guiding rollers
- 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
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
Landscapes
- Projection-Type Copiers In General (AREA)
Abstract
335,511. Jensen, V. April 20, 1929, [Convention date]. Divided on 333,023. Optical apparatus; film-driving mechanism. - Relates to the reproduction of sound from an optical record on a film in which the film at the portion of its path where it is moved in front of a slight slit is maintained taut between two guiding rollers. In the tube a are placed a light source b, a system of condensing lenses c, and a light slit d. The light passing through the film e is directed on to the photo-electric cell f by means of a mirror g and a lens h, and sound reproduction is effected through the circuit i containing an amplifier j and a. loud speaker k. The portion n of the film e is maintained taut between two guiding rollers o, p, which are coupled to the driving mechanism by transmissions g, r, respectively, so adjusted that the roller p tends to be driven at a higher peripheral speed than the roller o. Between the transmission r and the roller p is inserted a friction coupling s so adjusted that its driving member slides on the driven member to such an extent that both guiding rollers move the film at the same speed while maintaining the part h of the film e at a desired tension.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK335511X | 1929-04-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB335511A true GB335511A (en) | 1930-09-25 |
Family
ID=8150596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23793/30A Expired GB335511A (en) | 1929-04-20 | 1929-08-19 | Improvements in systems for reproduction of sound from optical sound records |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB335511A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5461308A (en) * | 1993-12-30 | 1995-10-24 | At&T Ipm Corp. | Magnetoresistive current sensor having high sensitivity |
-
1929
- 1929-08-19 GB GB23793/30A patent/GB335511A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5461308A (en) * | 1993-12-30 | 1995-10-24 | At&T Ipm Corp. | Magnetoresistive current sensor having high sensitivity |
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