Overhead projector focus arm adjustment mechanism

Details Overhead projector focus arm adjustment mechanism Overhead projector focus arm adjustment mechanism

1992-10-22

1993-09-14

Cuchlinski, Jr., William A.

Optics: image projectors

Miscellaneous

353DIG6, 353DIG3, G03B 21132

Patent

active

052453707

ABSTRACT:
An adjustment mechanism for use with an overhead projector having a post extending upwardly to support a projection head attached to the attachment mechanism incudes a wear pad partially surrounding the post, a friction pad disposed opposite the wear pad with respect to the post and a spring for urging the friction pad into the post.

REFERENCES:
patent: 3191491 (1965-06-01), Pignone et al.
patent: 3547530 (1970-12-01), Poole
patent: 3711194 (1973-01-01), Wilson, Jr.
patent: 4634246 (1987-01-01), Dreyer et al.
patent: 4795252 (1989-01-01), Kyhl

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