Tape cartridge release assembly
US3984871A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1975 |
| Grant date | Oct 5, 1976 |
| Priority date | — |
| Expiry date | Mar 14, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B15/67531
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improved tape cartridge release assembly for a player/reproducer apparatus of the type used in a vehicle will automatically release a cartridge when the vehicle ignition switch is turned off, will release a cartridge inserted while the ignition switch is turned off, and will release manually as desired. The assembly utilizes a pair of switches operated by insertion of a cartridge to provide identical voltages to the input and common terminals of a semiconductor circuit controlling the release actuator. The semiconductor circuit, by remaining non-conductive, will prevent release until forward biasing voltage is provided to the controlled semiconductor device as by the ignition switch, the manual release button or other means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.