Abstract: In a door latching and switch contact controlling device, an actuator having first and second radially extending angularly spaced apart members is mounted on a common shaft in a housing with a latching member for the member and actuator to rotate together. A striker fastened to a door strikes the first radially extending member when the door closes to turn the actuator so the second member rotates into an opening in the striker to thereby conceal the first member. An electroresponsive device positions a latching element into the path of a stop on the latching member when the device is energized, thereby preventing the actuator from turning reversely if an attempt is made to open the door.

Abstract: A film cassette sensing and retaining unit for film handling apparatus. The unit is responsive to completed insertion of a cassette into the film handling apparatus to mechanically latch the cassette in position and to electrically condition and actuate the film handling apparatus. Upon termination of operation of the film handling apparatus, the unit is effective to unlatch and eject the cassette and thereby deactuate the film handling apparatus. A disabling mechanism is provided to prevent premature unlatching and ejection of the cassette in a particular circumstance.

Abstract: A motion picture projector is provided with a high intensity projection arrangement for improved image projection that also provides a projection lamp having a longer operating life. The projector is interconnected to a power supply unit by a multiconductor umbilical cable to supply all voltage and power requirements of the projector.The power supply unit is enabled to supply a high voltage starting pulse to the high intensity projection lamp only upon the occurrence of predetermined conditions to prevent shock hazards. The enabling control of the power supply is accomplished by the use of a standard projector control switch and a housing interlock switch on the projection lamp arrangement. Further, the power supply unit is enabled only when the umbilical cable is properly connected between the projector and the power supply unit by means of a return path continuity detector.

Abstract: An improved film handling device or film cartridge designed for permanent mounting on a film strip projector or the like. The device or cartridge includes a base plate pivotally mounted to a sliding carriage and a storage cavity on the top of the base plate. The carriage comprises a tape cassette player and the base plate includes at least a pair of depending arms for slideably mounting a tape cassette. A drive sprocket is mounted on the base plate for engaging and feeding the film through a film gate in the projector. The carriage is movable between a generally forward, film loading position whereat the base plate is pivoted upwardly for easy access and a generally rearward, film feed position which permits the film to be transferred through the film gate. A safety interlock is provided on the cassette to prevent jamming of the film as the carriage is moved between its respective positions.

Abstract: A film handling apparatus blower system. The system includes a blower having a high-pressure, low-volume section and low-pressure, high-volume section. The high-pressure, low-volume section is a scroll-type centrifugal blower with a circular impeller of cellular material to minimize discernible noise, an axial intake port, and a high-pressure outlet port. The high-pressure outlet port is coupled to a duct which directs the output high-pressure air flow into a film cassette. The low-pressure, high volume section is also a scroll-type centrifugal blower having a bladed fan wheel, an axial intake port, and three low-pressure outlet ports. One low-pressure outlet port is coupled to a duct which directs output air flow to a location for flow adjacent the rearward portion of a projection lamp. A second low-pressure outlet port is coupled to a duct which directs output air flow to a location for flow adjacent the frontal portion of the projection lamp.

Abstract: A mechanism for conditioning a film cassette for plural film handling modes. The mechanism is effective to condition the film cassette for particular film handling modes by controlling the entry of light into the cassette and controlling the status of the film guides and the film pressure plate at the film gate area.

Abstract: A system for initiating operating mode change in a film handling apparatus in response to cessation of film movement incident to an end-of-film condition.

Abstract: A control system for a cinematographic film cassette processor/projector unit. The control system includes a function programmer comprising an operating cycle selector responsive to a processed/unprocessed indicator on the cassette to program the control system for either a processed-film operating cycle or an unprocessed-film operating cycle and a logic unit for programming the sequence and execution of the plural operational modes of the apparatus during an operating cycle. The control system further includes a reel drive control circuit having plural speed and direction drive control modes programmed by the function programmer, a mode change actuator circiut responsive to cessation of film movement to actuate a change in the operational mode of the processor/projector by changing the logic state of the logic disc assembly, and a manually-actuatable replay circuit.