Rotational drive mechanism

Details Rotational drive mechanism Rotational drive mechanism

1988-10-13

1990-09-18

Brown, Brian W.

354400, 354402, 354435, 74665GA, G03B 118

Patent

active

049581775

ABSTRACT:
A rotational drive mechanism includes a differential gearing assembly having a pair of output gears, to which a pair of mechanisms are connected. Rotation of the gears in the respective mechanisms is changed depending on the magnitude of respective loads. The first mechanism includes a gear (such as an AE gear of an exposure control mechanism) which is prevented form rotating by an engagement with a displacement member when the latter returns from its overcharged position to its attracted position. Thereupon, a gear in the second mechanism (such as an AF gear in a focus controlling mechanism) is enabled for rotation in either direction.

REFERENCES:
patent: 4724450 (1988-02-01), Miyawaki et al.
patent: 4728979 (1988-03-01), Akitake et al.

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