Patents by Inventor D. William Weber

D. William Weber 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).

  • Circuit and method for servo speed control
    Patent number: 4149117
    Abstract: A circuit and method for controlling the speed of operation of a servo motor, wherein multiple speeds of operation can readily be controlled. A non-linear ramp voltage is generated in response to a first set of clock signals produced in response to electrical pulses from a tachometer coupled to the servo motor. A second set of clock pulses, also generated by the tachometer pulses, controls periodic sampling of the non-linear ramp voltage at various points along the ramp as a function of the desired speed of operation.
    Type: Grant
    Filed: March 17, 1977
    Date of Patent: April 10, 1979
    Assignee: Ampex Corporation
    Inventor: D. William Weber