Patents by Inventor John H. Keightley

John H. Keightley has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4974959
    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.
    Type: Grant
    Filed: November 9, 1989
    Date of Patent: December 4, 1990
    Assignee: Production Arts Lighting Inc.
    Inventor: John H. Keightley
  • Patent number: 4556306
    Abstract: Apparatus are provided for automatically retrieving a rupturable film processing fluid container from a supply tray and thereafter depositing the retrieved container on one of a pair of converging positive and negative film sheets prior to the processing of the film sheets between a pair of pressure-applying rollers operable to rupture the fluid container and spread the processing fluid between the positive and negative film sheets.
    Type: Grant
    Filed: October 25, 1984
    Date of Patent: December 3, 1985
    Assignee: Polaroid Corporation
    Inventors: Duncan C. Sorli, John H. Keightley