Overhead projector focus arm adjustment mechanism

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

G - Physics

03

B

G03B 21/132 (2006.01)

Patent

CA 2145390

An adjustment mechanism for use with an overhead projector having a post (14) ex- tending upwardly to support a projection head (20) attached to the attachment mechanism in- cludes a wear pad (42) partially surrounding the post, a friction pad (44) disposed opposite the wear pad (42) with respect to the post and a spring (54) for urging the friction pad into the post.

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