Lens focusing means for slide projectors

Details Lens focusing means for slide projectors Lens focusing means for slide projectors

1975-12-01

1976-06-29

Aegerter, Richard E.

Optics: image projectors

Lens support

Lens position adjustable

350255, 352140, 354195, G02b 702, G03b 300, G03b 2114

Patent

active

039663159

ABSTRACT:
Means to manually or power focus the adjustable lens unit of the projector. The power adjustment can be made irrespective of the position of the adjustable lens unit and safety features are incorporated which prevent locking and possible damage to the adjustment means when the limit of adjustment of the lens unit in a given direction has been reached.

REFERENCES:
patent: 3134298 (1964-05-01), Volkholz
patent: 3631786 (1972-01-01), Crapsey
patent: 3639048 (1972-02-01), Heaney et al.
patent: 3785727 (1974-01-01), Wessner
patent: 3861794 (1975-01-01), Sobotta

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