Device for limiting the extent of movement of a moveable member

Details Device for limiting the extent of movement of a moveable member Device for limiting the extent of movement of a moveable member

1976-08-25

1978-01-03

Hix, L. T.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318468, 350255, G03B 310

Patent

active

040670317

ABSTRACT:
In a camera a moveable member moves under control of a motor towards a mechanical stop member provided to accurately position the moveable member. The moveable member may have an objective focusing lens riding thereon and the stop position may correspond to the position of focusing at infinity. The motor energization circuit is connected to the moveable member and the stop member. When the moveable member contacts the stop member the electrical current flowing therebetween operates a switching mechanism to cut off current to the motor.

REFERENCES:
patent: 2434680 (1948-01-01), White et al.
patent: 3701309 (1972-10-01), Thiele et al.
patent: 3811083 (1974-05-01), Minghella
patent: 3927414 (1975-12-01), Moriyama et al.
patent: 3970370 (1976-07-01), Kawai
patent: 3972056 (1976-07-01), Tsuiimoto et al.

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