Gramophone equipment
US4114893A · kind A · utility
9Cited by
5References
52Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1976 |
| Grant date | Sep 19, 1978 |
| Priority date | — |
| Expiry date | Mar 25, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/06
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Gramophone equipment incorporating photoelectric scanning to detect bands between record tracks; an electronic counter to count the detected bands; a selector for making track selections; an electronic memory for storing selections; control circuitry for comparing the contents of the counter and memory to control a tone arm of the equipment to play selected tracks and lift from a record at the end of a selection; and a tone arm drive comprising means for lifting and lowering the arm and means for driving the arm laterally under control of the control circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.