Patents by Inventor James M. M. Neilson

James M. M. Neilson 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).

  • DC Motor control
    Patent number: 4458183
    Abstract: To reduce battery drain by a DC electric motor (e.g. in the case of an ambulatory monitoring tape recorder) the motor is fed with pulses of current derived from a pulse circuit that includes a differential amplifier monitoring the voltage difference between a first reference voltage that is related to torque load on the motor and a second reference voltage that is derived by adding a sawtooth waveform to a base signal that is proportional to the voltage across the motor.
    Type: Grant
    Filed: October 15, 1982
    Date of Patent: July 3, 1984
    Assignee: The University Court of the University of Edinburgh
    Inventor: James M. M. Neilson