Exposure adjusting device for camera system

Details Exposure adjusting device for camera system Exposure adjusting device for camera system

1978-07-25

1980-06-10

Gellner, Michael L.

354 47, 354173, 354271, G03B 708, G03B 902, G03B 118

Patent

active

042069874

ABSTRACT:
In the combination of a camera and a motor drive unit, an exposure adjusting device is provided. This exposure adjusting device is manually controllable either by rotating a diaphragm adjusting ring that is in engagement with a presetting ring. This rotation is followed up by a scanning member which is coupled to a variable resistor that is connected in a control circuit for an exposure meter to attain correct adjustment of the diaphragm value and shutter time in conformity with the available light conditions. This exposure adjusting device also is automatically controllable through operative connection of the diaphragm scanning member with a control member which is provided in the unit. The control member movement is initiated and terminated by means of an electromagnetic actuator and arrest respectively with electrical power supply from a unit battery. With the camera detached from the unit, manually presetting the diaphragm is only selective, but the consumption of electrical energy from the camera battery is minimized. The driving torque of the film winding lever, moreover, is reduced by an amount necessary to overcome a strong drive spring for the diaphragm scanning control member.

REFERENCES:
patent: 3909833 (1975-09-01), Sorimachi et al.
patent: 3945024 (1976-03-01), Hasegawa et al.
patent: 4015198 (1977-03-01), Iwashita et al.

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