Stylus lifter locking mechanism for video disc player
US4488285A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 13, 1982 |
| Grant date | Dec 11, 1984 |
| Priority date | — |
| Expiry date | Dec 13, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B21/22
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The stylus arm carriage is provided with a rotatably-mounted torsional spring element. When the carriage is driven to an off-record home position, a pad mounted in the player above the carriage engages an upstanding portion of the rotatably-mounted element, and turns it around. When turned around, the other end of the rotatably-mounted element engages a carriage-mounted stylus arm support bracket to firmly secure it in place as long as the carriage is at the home position to prevent accidental lowering of the stylus. As the carriage is driven away from its home position, the torsional spring automatically returns to its original position to free the stylus arm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.