Slide changing apparatus with slide jam protection

Details Slide changing apparatus with slide jam protection Slide changing apparatus with slide jam protection

G - Physics

03

B

88/53, 88/87

G03B 23/02 (2006.01) G03B 23/04 (2006.01)

Patent

CA 2001316

-0- SLIDE CHANGING APPARATUS WITH SLIDE JAM PROTECTION ABSTRACT OF THE DISCLOSURE A slide changing apparatus is disclosed for use in a projection apparatus wherein photographic slides can be projected onto a screen or viewed on a video monitor. The slide changing mechanism includes a lever having a displaceable part which engages a slide and transfers the photographic slide from a projection position to a slide tray wherein slides are accommodated. A microprocessor controls the operation of a driving apparatus which is connected to the lever and actuates the lever. If a slide becomes jammed during movement between the projection position and the slide tray the displaceable part of the lever becomes displaced from its original position. The displacement of the displaceable part is detected by an optical switch and the optical switch outputs a signal to the microprocessor to stop the motor before damage to the jammed slide can occur.

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