Patents by Inventor Charles Vincent Armstrong

Charles Vincent Armstrong 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).

  • Power cut-off device
    Patent number: 6067219
    Abstract: A power cut-off device comprises first and second electronic switching devices (FETs T2 and T1) which are cross-coupled so that when one switching device is on the other is off and vice versa, and a load (11) to be protected is connectable in series with the first switching device (FET T2). If the current through the first switching device (FET T2) exceeds a certain value, caused for example by a short circuit at the load, the second switching device (FET T1) is turned on to turn the first switching device off.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: May 23, 2000
    Assignee: N. P. R. Technology Limited
    Inventors: Charles Vincent Armstrong, James Bonner
  • Traffic control device
    Patent number: 5959554
    Abstract: A traffic control device has a base (14) and a sign (16) rotatably carried by the base. The sign has at least two sides, one of which bears a "GO" indication and the other a "STOP" indication. A radio control means (11) causes a motor in the base to position the sign with the "GO" and "STOP" sides alternately in substantially the same angular position relative to the base.
    Type: Grant
    Filed: July 18, 1996
    Date of Patent: September 28, 1999
    Assignee: Charles Vincent Armstrong
    Inventors: Charles Vincent Armstrong, James Bonner