Motor drive unit for camera having variable winding speed charac

Details Motor drive unit for camera having variable winding speed charac Motor drive unit for camera having variable winding speed charac

1979-07-18

1981-06-09

Hix, L. T.

G03B 118

Patent

active

042721733

ABSTRACT:
A motor drive unit for a camera having variable winding speed characteristics functions so as to operate in a manner suited to environmental conditions such as temperature. This is done by changing the gear ratio from the motor to one of two values near the point of maximum efficiency and the point of maximum power output of the characteristic curve of the motors. Timer-controlled change of film frequency variation for providing a combined effect with the gear ratio is also disclosed.

REFERENCES:
patent: 1007012 (1911-10-01), Spinks
patent: 3909835 (1975-09-01), Ito et al.
patent: 3951531 (1976-04-01), Nakai et al.
patent: 4171892 (1979-10-01), Kozuki et al.

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