Slide projector
AssigneeProduction Arts Lighting Inc.
InventorJohn H. Keightley
Life of this patent
Estimating the term…
Abstract
A slide projector having a projector frame and a light source and lens assembly mounted on the frame which includes a cassette having a plurality of slide frame receptacles for receiving slide frames therein. The cassette is movable so as to bring selected slide frames into a dispensing position. A frame grabber mounted on the projector frame is movable in a direction perpendicular to the lens axis from a projection position in which an image of an engaged slide can be projected to a dispensing position in which slide frames can be sequentially brought into alignment with the grabber. Once engaged by the grabber, a selected aligned slide frame can be extracted from the cassette and moved to the projection position.
Claims24
A slide changer for a slide projector, said projector having a projector frame and a light source and lens assembly mounted on said projector frame, comprising:
- a cassette having a plurality of slide frame receptacles for receiving slide frames therein and movable so as to bring selected slide frames into a dispensing position;
- a frame grabber for mounting on a projector so that it is movable from a projection position in which an image of an engaged slide can be projected to a dispensing position in which slide frames can be sequentially brought into alignment with said grabber and from which a selected aligned slide frame can be extracted from said cassette and moved to the projection position wherein said slide frame is brought into engagement with said frame grabber by movement of said cassette.
A slide projector having a projector frame and a light source and lens assembly mounted on said frame, comprising:
- a cassette having a plurality of slide frame receptacles for receiving slide frames therein and movable so as to bring selected slide frames into a dispensing position;
- a frame grabber mounted on said projector frame, movable in a direction perpendicular to the lens axis from a projection position in which an image of an engaged slide can be projected to a dispensing position in which slide frames can be sequentially brought into engagement with said grabber by movement of said cassette and from which a selected engaged slide frame can be extracted from said cassette and moved to the projection position.
A projector according to claim-9, including a guide block mounted on said projector frame, said guide block having a guide channel therein to receive protuberances on said slide frames and guide said slide frames successively into position into engagement with said frame grabber when said frame grabber is in a frame grabbing position.
A slide projector having a projector frame and a light source and lens assembly mounted on said frame, comprising:
- a cassette having a plurality of slide frame receptacles for receiving slide frames therein and linearly movable so as to bring selected slide frames into a dispensing position;
- a frame grabber mounted on said projector frame, movable in a direction perpendicular to the lens axis from a projection position in which an image of an engaged slide can be projected to a dispensing position in which slide frames can be sequentially brought into alignment with said grabber while said grabber is in a fixed frame receiving position and from which a selected aligned slide frame can be extracted from said cassette and moved to the projection position;
- cassette motor means for reversibly moving said cassette to a selected position;
- frame grabber motor means for reversibly moving said frame grabber;
- and
- means for guiding said slide frames into engagement with said frame grabber one after another as said cassette is moved forwardly away from said start position.
A method of dispensing slide frames stored in a movable cassette comprising:
- moving a slide frame grabber having a pair of slide frame engaging elements into a dispensing position juxtaposed to associated receiving elements on said slide frame for receiving said engaging elements;
- moving said cassette so that a selected slide frame is engaged with said frame grabber engaging elements;
- moving said slide frame grabber and engaged slide frame back to a projection position in which an image of a slide contained in said slide frame is projected.
Dependencies are inferred from the claim text.