Patents by Inventor Richard L. Pitchford

Richard L. Pitchford 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).

  • Image expander for rear-screen projectors
    Patent number: 4221473
    Abstract: A slide projector located within a rear-screen projector has means therein for projecting images, contained on slides, onto a self-contained projection screen. Two lenses having different focal lengths are mounted within the projector housing and may alternatively be brought into the optical path for projecting slides, having different size formats, such that the projected image fills the projection screen.
    Type: Grant
    Filed: November 16, 1978
    Date of Patent: September 9, 1980
    Assignee: The Singer Company
    Inventor: Richard L. Pitchford
  • Filmstrip projector take-up
    Patent number: 4206985
    Abstract: A cylindrical shaped filmstrip take-up chamber is disclosed having an expandable inside cavity for receiving a varying quantity of coiled filmstrip. A cup-shaped film receiving cover closes the chamber and is both pivotally mounted near the midpoint thereof for selectively allowing access to the inside of the take-up chamber and pivotally retained at the bottom thereof allowing the cover to pivot within the confines of the chamber varying the inside volume of the take-up chamber.
    Type: Grant
    Filed: February 22, 1979
    Date of Patent: June 10, 1980
    Assignee: The Singer Company
    Inventor: Richard L. Pitchford