Patents by Inventor Richard Lightfoot

Richard Lightfoot 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).

  • Apparatus for insertion and withdrawal of printed circuit boards into and from mounting frames
    Patent number: 4064551
    Abstract: Printed circuit boards for mounting in a mounting frame, as in telecommunications systems, have a faceplate mounted on the front edge of the board by means of a flange extending along one edge of the faceplate. At one end of the faceplate a slot is formed in the front flange of the faceplate, the slot spaced from the top flange approximately the thickness of the printed circuit board. A further flange extends along the edge of the slot remote from the printed circuit board, and a cam member is pivotally mounted in the slot. The cam member pivots in two opposed holes, one in the further flange and one in the printed circuit board. The cam member has an elongate body portion with at least one rib on the body portion which snaps into the slot in a closed condition. A cam portion extends from one end of the body portion, the cam portion extending laterally from the faceplate and engaged behind a frame member when cam member is in the closed position.
    Type: Grant
    Filed: November 29, 1976
    Date of Patent: December 20, 1977
    Assignee: Northern Telecom Limited
    Inventor: Richard Lightfoot