Folding arm for overhead projector

Details Folding arm for overhead projector Folding arm for overhead projector

1990-03-01

1990-12-18

Haroian, Harry N.

Optics: image projectors

Housing

353DIG4, 353 66, 353 72, G03B 2100

Patent

active

049782185

ABSTRACT:
A portable overhead projector having a folding arm. The arm and a torque member are pivotally attached to the projector head, forming a four bar linkage. When the arm is moved from an upright, operative position to a storage position, the projector head rotates so as to be flush with the base of the projector, making the projector more compact for storage. An adjustment mechanism is also provided to automatically open and close a mirror which is attached to the projector head, simplifying the set up procedure of the overhead projector.

REFERENCES:
patent: 2496647 (1950-02-01), Woodbury
patent: 3653754 (1972-04-01), Yamanaka
patent: 3870411 (1975-03-01), Schwartz et al.
patent: 4449800 (1984-05-01), De Longis et al.
patent: 4588271 (1986-05-01), Emura
patent: 4636050 (1987-01-01), Tohata et al.
patent: 4696557 (1987-09-01), Tomizuka
patent: 4728184 (1988-03-01), Kyhl
patent: 4824239 (1989-04-01), Sekine

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