| 摘要 |
A motion picture projector includes a housing, a movable pressure pad on the housing biased toward an aperture plate to define a film channel therebetween for receiving a strip of film. An edge guide is mounted on the housing for movement from a position adjacent one edge of a received strip of film to a position spaced from said strip of film, and a film advancing member is mounted on the housing for movement into and along the film channel so as to intermittently advance a received strip of film along the channel. An actuator is rotatably mounted on the housing and is connected to the pressure pad and the edge guide so that rotation of the actuator in one direction opens the film channel by moving the pressure pad away from the aperture plate and moving the edge guide to its position spaced from the film strip. Cam means are provided for moving the actuator along its axis of rotation upon rotation of the actuator in a channel-opening direction, the actuator being interconnected to the film advancing member to block movement of the film advancing member into the film channel upon such axial movement of the actuator. A film detecting member is mounted on the housing for movement between a first position in which a portion of the detecting member extends into the path of a strip of film in the region of the channel and a second position in which that portion of the detecting member is spaced from the film path. The detecting member is connected to the actuator whereby rotation of the actuator in a channel opening direction moves the member to its second position.
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