Patents by Inventor Dennis O. Overfield

Dennis O. Overfield 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).

  • Patent number: 4417189
    Abstract: A control circuit for a stepping motor includes a source of pulses at a first frequency which is applied to the stepping motor. In response to a gate signal, the circuit gradually increases the rate of pulses at the stepping motor. After reaching a predefined maximum pulse rate, the pulse remains at a constant rate for some time and then gradually decreases until reaching said first rate where it remains until another gate signal occurs. As such, the motor runs at one speed, accelerates to a second speed and remains there for a time and then decelerates to said one speed.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: November 22, 1983
    Assignee: The Perkin-Elmer Corporation
    Inventor: Dennis O. Overfield