Reflective overhead projector with alternate light sources

Details Reflective overhead projector with alternate light sources Reflective overhead projector with alternate light sources

G - Physics

02

B

88/46.5, 88/96.8

G02B 26/08 (2006.01) G03B 21/132 (2006.01) G03B 21/20 (2006.01) G03B 21/28 (2006.01)

Patent

CA 2038802

A reflective overhead projector is provided with two lamps for the purpose of allowing change from one to the other of the lamps in the event of expiration of the lamp in use. The lamps are arranged to face the center of a circle at which is positioned a rotatable planar mirror which may be turned to direct light from a desired one of the two lamps. An electrical switch senses the position of the mirror and directs electrical power to the appropriate lamp.

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