Projector cartridge for a filmstrip and a tape cassette

Claim 1

In a projection cartridge for holding a filmstrip and a tape cassette, said cartridge being of the type comprising a base including a mounting plate, a housing mounted on one side of the plate and being adapted to receive a filmstrip and having guide means for guiding the movement of the filmstrip into and out of the housing at a predetermined location relative to said base, the other side of said plate including positioning means and being adapted to receive a tape cassette in a predetermined position relative to said base with the tape head of the cassette coacting with said positioning means, and retaining means for releasably attaching the cassette to the base, the improvement wherein said retaining means comprises a first cam-actuated spring retaining hook mounted on one end of the plate for engaging one end of the cassette and a second cam-actuated spring retaining hook mounted on the other end of the plate for engaging the other end of the cassette, each of said retaining hooks comprising a cantilever arm extending from said plate perpendicular thereto and being integral therewith, each of said cantilever arms having an inwardly projecting nose for camming engagement with a shoulder on said cassette when the cassette is moved toward and away from said plate, whereby the cassette may be attached to said base by pressing it toward the plate in alignment with the positioning means and may be released from the base by pulling it away from said plate.