Record disk cartridge
US4131199A · kind A · utility
22Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1977 |
| Grant date | Dec 26, 1978 |
| Priority date | — |
| Expiry date | Oct 27, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/033
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A record disk cartridge has a single internal shutter for opening and closing a head access port adjacent a spindle access member in one wall. A further aperture allows the shutter to be actuated to an open position as the cartridge is moved into a playing position. The shutter also brakes the disk against movement when the cartridge apertures are closed. A magnetic coupling enables rotation of the disk inside the cartridge.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.