Audio-slide projector

Claim 1

An audio-slide projector for use with individually mounted transparencies having a magnetic recording surface on the mounting portion surrounding the transparency, said projector comprising a housing, a slide mechanism carried on said housing and adapted to move a mounted transparency along a first path between a position externally of the housing and a position within the housing, said slide mechanism having means defining an opening therein to receive a transparency and including springbiased means for automatically centering the transparency relative to the opening, means for projecting an image of the transparency on to a viewing surface, and sound-reproducing mechanism including a pickup head within said housing which is engageable with the recording surface portion of a slide inserted therein and movable to trace a path on the recording surface without interfacing with the projection of the transparency, said pickup head being supported on a carrier which is movable through a second path substantially parallel to said first path of said slide mechanism, means operably connected with said carrier to effect continuous oscillation thereof back and forth along a predetermined length of said second path including a cardioid cam drivingly connected with said carrier, and an electric motor drivingly connected with said cam to rotate the cam to effect oscillation of said carrier at a constant speed, means supporting said pickup head on said carrier for incremental movement relative to said carrier and at right angles to said second path, and elevating means including stop means at opposite ends of said second path, which stop means are positioned for cooperative engagement with said support means for said pickup head so that said elevating means effect movement of said pickup head through an increment each time the carrier reaches one end of said predetermined length of said second path.