Recording apparatus with switch actuated memory storage of recording medium removal or loading and backup power supply for memory
US4951276A · kind A · utility
10Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1987 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Dec 2, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B19/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A recording apparatus capable of exchanging the recording medium includes a switch arranged to operate when the recording medium is exchanged, an electronic memory for storing the output of the switch in the electrical form, and a backup battery for supplying electrical power to the memory. Despite that the main electrical power source is cut off, the memory retains the storage of the fact of whether or not an event of exchanging the recording medium has ever occurred. After the position of the recording head has been re-adjusted, the memory is erased easily and quickly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.