Camera with computer circuit
US4645326A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1986 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | May 27, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/091
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Cameras of the kind having a computer circuit for control actions such as sequence control, etc. are arranged to render the computer circuit inoperative for prevention of an erroneous action in the event of a drop in the power supply voltage. However, in case that the voltage drop takes place during a data transfer process within the computer circuit, if the computer circuit is rendered inoperative immediately after the voltage drop, an erroneous data would be transferred to a memory circuit. Whereas, this invention provides arrangement to keep the computer circuit operative until completion of data transfer in the case of a voltage drop during the process of data transfer to the memory circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.