Patents by Inventor David L. Sykes

David L. Sykes 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).

  • Arc suppression circuit
    Patent number: 9124087
    Abstract: An improved arc suppression circuit is disclosed for a switch having switch comprising a shunt circuit connected across the switch. A trigger circuit senses the voltage across the switch for actuating the shunt circuit when voltage across the switch contacts exceeds a predetermined level to reduce arcing current at the switch.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: September 1, 2015
    Assignee: Technology Research Corporation
    Inventor: David L Sykes
  • ARC SUPPRESSION CIRCUIT
    Publication number: 20140327992
    Abstract: An improved arc suppression circuit is disclosed for a switch having switch comprising a shunt circuit connected across the switch. A trigger circuit senses the voltage across the switch for actuating the shunt circuit when voltage across the switch contacts exceeds a predetermined level to reduce arcing current at the switch.
    Type: Application
    Filed: May 6, 2013
    Publication date: November 6, 2014
    Inventor: David L Sykes
  • Voltage compensation circuit
    Patent number: 8436602
    Abstract: A voltage compensation circuit is disclosed for proving an elevated output AC voltage upon an under voltage input AC voltage condition. The voltage compensation circuit comprises an autotransformer having a first and a second autotransformer winding. A first position of a switch connects the first autotransformer winding to the input AC voltage for providing an elevated output AC voltage at the second autotransformer winding. The second position of the switch shorting the first autotransformer winding for providing a non-elevated output AC voltage.
    Type: Grant
    Filed: August 14, 2009
    Date of Patent: May 7, 2013
    Assignee: Technology Reasearch Corporation
    Inventor: David L. Sykes
  • Voltage compensation circuit
    Publication number: 20100039090
    Abstract: A voltage compensation circuit is disclosed for proving an elevated output AC voltage upon an under voltage input AC voltage condition. The voltage compensation circuit comprises an autotransformer having a first and a second autotransformer winding. A first position of a switch connects the first autotransformer winding to the input AC voltage for providing an elevated output AC voltage at the second autotransformer winding. The second position of the switch shorting the first autotransformer winding for providing a non-elevated output AC voltage.
    Type: Application
    Filed: August 14, 2009
    Publication date: February 18, 2010
    Applicant: Technology Research Corporation
    Inventor: David L. Sykes