Automatic flash photography apparatus

Details Automatic flash photography apparatus Automatic flash photography apparatus

1974-09-11

1976-11-23

Hayes, Monroe H.

354230, 354258, G03B 1738

Patent

active

039940071

ABSTRACT:
The disclosed automatic flash photography apparatus operates with a camera having a shutter in which a diaphragm blade serves as a shutter blade, and the diaphragm diameter is varied by varying the time interval from the moment its blades start opening till the moment they start closing. A switch switches over between separate time constant circuits, one for artificial-light photography, the other for natural-light photography. For flash photography, a resistor which is variable in response to the distance from a light source to an object and the film sensitivity controls the time constant circuits for closing the diaphragm blades. Thus a flash device is illuminated and the amount of light passing the diaphragm aperture is established.

REFERENCES:
patent: 2218252 (1940-10-01), Stoiber
patent: 3072028 (1963-01-01), Lange
patent: 3400645 (1968-09-01), Kiper
patent: 3418904 (1968-12-01), Wick
patent: 3457844 (1969-07-01), Kitai
patent: 3535989 (1970-10-01), Kitai

Affiliated with

Also associated with

Rating

Automatic flash photography apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic flash photography apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic flash photography apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-234910