Camera having film counter
US5729775A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1996 |
| Grant date | Mar 17, 1998 |
| Priority date | — |
| Expiry date | Sep 30, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B7/26
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A camera having a film counter according to the present invention includes a display device which displays information related to frames of a film; a detector which detects that a battery has been replaced while the camera is loaded with the film; a volatile memory which stores information related to a number of remaining unexposed frames of the film; and a controller which causes the display device to display the number of remaining unexposed frames according to the information stored in the volatile memory until the battery is replaced, and switches the display device to display a frame number in a forward count display, in which a frame number increases for each exposure, in response to a signal generated by the detector upon replacement of the battery.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.