Apparatus for dating camera film
US4167315A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1977 |
| Grant date | Sep 11, 1979 |
| Priority date | — |
| Expiry date | Jul 26, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B2217/243
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Dating information is applied to camera film from date information displaying circuitry which receives decoded electronic time signals generated by a chronometer. A first power source energizes the chronometer and a second power source energizes the decoder and display circuitry and other components such as the exposure control circuit. A monitor is provided to enable the camera operator to observe the date information. Manually operable switches are provided to independently actuate the dating apparatus and the exposure control circuit as well as to independently operate the display circuitry and the monitor. In a modified embodiment, logic and switching circuitry are provided to monitor and date either exposure data obtained from a light measuring circuit and analog/digital converter or the date information generated by the chronometer. A manually independently operable switch for actuating the display circuitry is ganged with the switching circuit to expose the date information on the film. Another switch ganged with the switching circuit enables the date information to be monitored. The display circuitry includes switches enabling the date information to be monitored independen…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.