1977-06-08
1979-04-03
Gellner, Michael L.
354198, 354225, 354289, G03B 1505, G03B 1308, G03B 1318, G03B 1700
Patent
active
041474201
ABSTRACT:
In a flash camera having a zone-focusing system and an electronic flash device in one united body, wherein the flash camera comprises an electro-luminescence device for emitting light by AC output fed from a DC-DC converter circuit in the electronic flash device, an indicator having symbol marks for indicating an object distance and illuminated by the electro-luminescence device, and a pointer, linked to a focus-adjusting device for adjusting focus of the main photographic lens of the camera, for pointing the symbol marks on the indicator. The symbol marks can be easily identified through the illumination by the electro-luminescence device and further a voltage decrease of power source battery in the DC-DC converter circuit can be easily and clearly observed.
REFERENCES:
patent: 3012464 (1961-12-01), Papke
patent: 3393623 (1968-07-01), Gutmann et al.
patent: 4041508 (1977-08-01), Edamoto et al.
Iwata Hiroshi
Yamaoka Tetsuo
Gellner Michael L.
West Electric Company Ltd.
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