Optics: image projectors – Housing
Patent
1994-10-19
1995-09-19
Cuchlinski, Jr., William A.
Optics: image projectors
Housing
353DIG4, 353 63, G03B 2100
Patent
active
054520320
ABSTRACT:
An overhead projector a base table, which has a stage on which an original is placed. A projecting head includes projecting mirror and lens, and forms an image of the original. A stand has bottom and top ends. The bottom end is mounted on the base table. The stand swings between an erected position and a folded position where the stand is superposed on the stage. The projecting head is mounted on the top end in swingable fashion. An extension coil spring is disposed between the stand and the base table, biases the stand from the folded position to the erected position, and has biasing force decreasing according as the stand comes nearer to the erected position. A gas spring is disposed between the stand and the base table, biases the stand from the folded position to the erected position, and has biasing force increasing according as the stand comes nearer to the erected position.
REFERENCES:
patent: 4588271 (1986-05-01), Emura
patent: 4776688 (1988-10-01), Ushiro et al.
patent: 4938587 (1990-07-01), Namioka et al.
patent: 4978218 (1990-12-01), Carpenter et al.
patent: 5317350 (1994-05-01), Nomura et al.
patent: 5345282 (1994-09-01), Ushiro et al.
Aosaki Ko
Oh Yanggyun
Cuchlinski Jr. William A.
Dowling William C.
Fuji Photo Film Co. , Ltd.
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