Patents by Inventor Stanley J. Tofield

Stanley J. Tofield 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).

  • Projection cathode ray tube having tapered shaft screw target assembly
    Patent number: 5619095
    Abstract: A projection cathode ray tube having an improved target assembly (22) for minimizing target tilt and hot focus drift is disclosed. The target member (24) is supported by a shaft screw (37) secured to a face plate (20) of the projection tube by an adjustment pad (58) external to the tube in cooperation with a biasing spring (46) internal to the tube that exerts a tensile load on the shaft screw (37). A shaft screw tapered shoulder (36) and threaded mounting stud (34) engage a tapered seat (32) and threaded mounting bore (30) of the target (24), with the taper angle (.theta.) common to the shoulder and seat calculated to maintain constant contact between the abutting surfaces of the shoulder (36) and the seat (32) during thermal expansion and contraction of the target member (24) and shaft screw (37).
    Type: Grant
    Filed: February 21, 1995
    Date of Patent: April 8, 1997
    Assignee: Hughes Aircraft Company
    Inventors: Kenneth S. Salyer, Stanley J. Tofield, Anthony B. Harrup