Patents by Inventor John E. Sargunar

John E. Sargunar 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).

  • Tape transport system including a logical network for producing quadrature pulse trains and motor control utilizing same
    Patent number: 3938757
    Abstract: A constant speed reel-to-reel tape transport system is described including a drive motor having a pair of quadrature windings, and a motor supply producing a pair of square-wave motor-drive pulse trains of the same repetition rate, but 90.degree. out of phase, one train being supplied to each of the quadrature windings. The system further includes control means responsive to the change in the effective radius of one of the reels, for example the drive reel, for varying the repetition rate of the pulse trains, and thereby the speed of the motor, to maintain a constant linear tape speed.
    Type: Grant
    Filed: March 29, 1974
    Date of Patent: February 17, 1976
    Assignee: Burroughs Corporation
    Inventor: John E. Sargunar