Sound reproducing unit
US4101135A · kind A · utility
0Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 17, 1977 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | Jan 17, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A voice or sound unit adapted for use on toys and the like has a mechanical linkage system with a joint capable of transmitting sound indicia while isolating the tone arm from any absorption of stylus movement. The tone arm can employ flexure hinges to insure a constant force on the stylus. A planetary gear coupling system provides a unique drive transmission to either a single turntable or a pair of concentric turntables. If a pair of turntables are used, they can be relatively rotated to combine a large number of sound sequences.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.