Sound track unit for audio-visual apparatus
US3930654A · kind A · utility
1Cited by
6References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 5, 1973 |
| Grant date | Jan 6, 1976 |
| Priority date | — |
| Expiry date | Dec 5, 1993 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B31/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A device for the viewing of photo-images and the presentation of sound recordings corresponding to such photo-images, which device may be controlled by the user to provide substantially random access to any photo-image and the sound recording corresponding thereto, is disclosed. A modular construction of such device and its adaptability to either hand-held or projection embodiments is described. A novel tone arm system as well as a novel turntable driving mechanism, a novel disc type record unit and a novel record changing mechanism is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.