Overhead projector

Claim 1

An overhead film projector comprising, in combination: a projecting unit including a light source and a projecting lens; a primary film support having a projecting lens side facing said projecting lens and located in spaced relationship with the projecting unit in position to receive light from said source, said projecting unit forming a projecting luminous beam by lighting the primary film support from the projecting lens side; an auxiliary film support including a transparent portion; means for removably positioning the auxiliary film support between the projecting unit and the primary film support; an auxiliary lens for directing light to the projecting lens from the auxiliary film support; means for supporting the auxiliary lens for movement between an operative position in juxtaposition with the projecting lens and an inoperative position remote from said projecting lens; and a housing for said projecting unit and said primary film support, said housing being collapsible into a compact structure while maintaining the projecting unit and the primary film support therein; and prop means connected to the projection unit for supporting the projection unit; said housing including a base pivotally connected to the prop means and a lid divided into a pair of half-lid members, each of the half lid members being pivotally connected to the base; and said means for removably positioning the auxiliary film support including means for hanging said auxiliary support on one of the half-lid members.