Patents by Inventor Christopher John Yarrow

Christopher John Yarrow 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).

  • Electrical generating apparatus
    Patent number: 4035712
    Abstract: A constant frequency a.c. generating system includes an alternator driven at a variable speed. A rectifier provides a d.c. supply for a rotary inverter. To maintain the voltage and frequency of the inverter output constant, the frequency is monitored and used to control the alternator field current and the voltage is monitored and used to control the inverter field current in a regulator circuit.
    Type: Grant
    Filed: March 5, 1976
    Date of Patent: July 12, 1977
    Assignee: Lucas Industries Limited
    Inventors: Christopher John Yarrow, Ronald Johnson, James Patrick Doyle
  • Rotary inverters for converting D.C. to A.C.
    Patent number: 4024455
    Abstract: A rotary inverter for converting d.c. to a.c. includes a rotary field winding and a stationary armature including two windings. One winding is supplied with d.c. switched in synchronism with the rotation of the field winding. The other winding is electrically isolated from the first mentioned winding but is magnetically coupled thereto and provides the a.c. output. The two windings occupy the same slots in the armature.
    Type: Grant
    Filed: March 4, 1976
    Date of Patent: May 17, 1977
    Assignee: Lucas Industries Limited
    Inventors: Christopher John Yarrow, Ronald Johnson