1977-07-26
1979-09-11
Gellner, Michael L.
354 23D, G03B 1724
Patent
active
041673158
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 independently of dating the film. One switch is actuated in timed relation with the shutter operation and manual closure of a second switch and opening of a third switch effects dating of the camera film.
REFERENCES:
patent: 3882512 (1975-05-01), Lawrence et al.
patent: 3937002 (1976-02-01), Van Haaften
patent: 3953868 (1976-04-01), Kawamura et al.
patent: 3995289 (1976-11-01), Shono
patent: 3996593 (1976-12-01), Uno et al.
patent: 4025931 (1977-05-01), Taguchi et al.
patent: 4034550 (1977-07-01), Kouchi et al.
patent: 4053909 (1977-10-01), Shinoda et al.
Beppu Norio
Nanba Yasuhiro
Yamada Seiji
Gellner Michael L.
Minolta Camera Kabushiki Kaisha
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