Audiovisual display apparatus

Claim 1

An audiovisual display apparatus comprising: a chassis having a projection opening; an illuminating system including a light source, a condensing system to gather and converge the light from said light source toward a projection lens, a projection lens, an adjustable reflector device for reflecting the light from said projection lens through said projection opening in said chassis; a film cartridge including a cartridge body for holding and guiding an endless loop of film, said cartridge body including two sides sPaced apart a distance corresponding to the width of said film; a film window extending between said two sides of said cartridge body for holding a frame of said film for projection, said film cartridge being mountable on said chassis so that said film window is disposed between said condenser and said projection lens; a recess in one of said two sides of said cartridge body adjacent said film window to receive said projection lens and said adjustable reflector device; a compartment extending from said one of said two sides of said cartridge body a distance corresponding to the width of said film for holding a coil of said film; an audio-tape cartridge containing an audio-tape mounted on the other of said two sides of said cartridge body; and a pair of ramps extending from opposite sides of said cartridge body; a locking mechanism for locking said audiovisual cartridge in position for use including a mounting plate mounted on said chassis and having an opening for receiving said audiovisual cartridge; a first arm having a first end and a second end, said first end of said first arm being pivotally mounted on said mounting plate; a second arm having a first end and a second end, said second arm being pivotally mounted at its middle on said mounting plate; a link member linking said second end of said first arm to said first end of said second arm; a first locking lug projecting from the middle of said first arm toward said opening in said mounting plate; a second locking lug projecting from said second end of said second arm toward said opening in said mounting plate; spring means urging said first locking lug and said second locking lug to engage said ramps projecting from opposite sides of said audiovisual cartridge to hold said audiovisual cartridge in position within said opening in said mounting plate; a control lever pivotally mounted on said mounting plate adjacent one of said arms; and a cam element mounted on said control lever for contacting and moving said one of said arms to withdraw said first and second locking lugs from said ramps to release said audiovisual cartridge when said control lever is rotated; an audio-tape drive capstan; an audio-tape pinch roller; second spring means urging said pinch roller toward said drive capstan; a movable sound reproduction head; third spring means urging said sound reproduction head toward said audio tape in said audiovisual cartridge; and means connected to said control lever for retracting said pinch roller from said drive capstan and for retracting said sound reproduction head from said audio tape when said control lever is rotated to retract said first and second locking lugs from said ramps projecting from said audiovisual cartridge and for permitting said pinch roller to contact said drive capstan in response to said second spring means and for permitting said sound reproduction head to contact said audio tape in response to said third spring means when said control lever is rotated to cause said first and second locking lugs to engage said ramps projecting from said audiovisual cartridge and thus lock said audiovisual cartridge in position within said opening in said mounting plate.