Patents by Inventor Brian J. Baker

Brian J. Baker 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).

  • Optical rotary headwheel tape recording system
    Patent number: 4815067
    Abstract: A helically scanned optical tape recording and replay system has a rotating drum with a galvanometer mirror for controlling the tracking of a number of write and read light beams during recording and replay. Dynamic focussing of the beams on the recording medium is controlled by means of a voice-coil actuator operating on a lens situated outside the drum. An optical rotator is provided through which the write and read beams pass following beam combinations, the optical rotator being driven by a motor to rotate at half the rotational velocity of the drum, and thereby present an image to the optical tape which rotates synchronously with the drum.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: March 21, 1989
    Assignee: Thorn EMI plc.
    Inventors: Elizabeth A. Webster, John C. Newell, Brian J. Baker, Paul E. Claes