Projector

Claim 1

A projector comprising a film supply support and a film receiving support for film supply means and film receiving means, respectively, means for advancing film from said film supply means to said film receiving means, a light source position to pass light through said film, a translucent screen, an optical system having an optical axis and projecting an image from the film to said screen, said optical system comprising a lens of lower magnification and a lens of higher magnification both mounted on a single carriage, a fixed shaft positioned on the opposite side of the film from the light source along an axis transverse to the optical axis the carriage is slidably mounted on the shaft for movement along its axis, shifting means connected to said carriage for both interchangeably positioning the respective lenses relative to said film by said sliding movement and for moving the lens of higher magnification back and forth in two directions so that said film may be scanned to project a select area thereof, said shifting means comprising a cam attached to said carriage, a follower bearing on said cam, an arm attached to said follower, said arm being in turn fixedly connected to a rotatable and longitudinally movable shaft which on longitudinal movement moves said lens of higher magnification in a longitudinal direction perpendicular to the direction of said interchangable positioning of said lenses and when rotated both shifts said lenses and moves said lens of higher magnification in a direction perpendicular to said longitudinal direction, a reflective surface oriented to reflect the optical axis of the projecting lens to a second reflecting surface, said second reflecting surface oriented to reflect said optical path to said translucent screen, said translucent screen being positioned adjacent and perpendicular to the optical axis of the projecting lens.