Overhead projector

Details Overhead projector Overhead projector

1978-09-12

1980-06-10

Phillips, Charles E.

Optics: image projectors

Temperature control

Blower

353 98, G03B 2116

Patent

active

042069840

ABSTRACT:
A projector comprises a base carrying a working surface for matter whose image is to be projected and a side stand on which a casing is mounted, extending over the working surface, the casing having a two part lamp housing with the upper part carrying a reflector and the lower part movably mounted with respect to the upper part carrying a condenser lens, a lamp being positioned between the reflector and the condenser.

REFERENCES:
patent: 3209646 (1965-10-01), Appeldorn et al.
patent: 3293982 (1966-12-01), Appeldorn
patent: 3340765 (1967-09-01), Herriott
patent: 3711194 (1973-01-01), Wilson
patent: 3762809 (1973-10-01), Kato et al.

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