Write protection device
US4549240A · kind A · utility
15Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 26, 1982 |
| Grant date | Oct 22, 1985 |
| Priority date | — |
| Expiry date | Nov 26, 2002 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B23/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording disk cartridge has a write control sensing aperture extending through the cartridge. A shutter is mounted within the cartridge for back and forth rotational movement between aperture blocking and aperture opening positions. The shutter is restrained against accidental movement or drift from these positions. The shutter can be assembled locked in a write protect position and must be reassembled to permit movement between the write protect and write enable positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.