Patents by Inventor Paul M. McHugh

Paul M. McHugh 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 RECORDING OF VIDEO SIGNALS
    Publication number: 20010019655
    Abstract: A digital tape recorder comprises means for recording video material onto video sections of a digital tape; and means for recording digital cataloguing data corresponding to the video material onto cataloguing data sections longitudinally interspersed between video sections on the digital tape.
    Type: Application
    Filed: April 9, 1997
    Publication date: September 6, 2001
    Inventors: MARTIN R DORRICOT, SIMON CHANDLER, PAUL M MCHUGH
  • Current shaping in reluctance machines
    Patent number: 5923141
    Abstract: A current control circuit for a switched reluctance machine provides corner shaping at the end of the active conduction period of a phase in which the phase winding is energized. The pulse width modulated firing pulses are gradually reduced in duty cycle so that the transition between the current in the winding in the active period and the decay of current in a ramp down period is smoothed to reduce the forces leading to vibration and acoustic noise.
    Type: Grant
    Filed: April 9, 1997
    Date of Patent: July 13, 1999
    Assignee: Switched Reluctance Drives, Ltd.
    Inventor: Paul M. McHugh