Patents by Inventor Ralph A. Thompson

Ralph A. Thompson 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).

  • Chipper knife assembly
    Patent number: 5183089
    Abstract: A knife assembly for a chipping canter has a knife holder which is mounted on a rotatable chipper head. Along an upper edge of the knife holder is a receiving and holding portion in which is removably mounted a readily replaceable chipper knife.
    Type: Grant
    Filed: January 28, 1992
    Date of Patent: February 2, 1993
    Assignee: Weyerhaeuser Company
    Inventors: Norman E. Norlander, Ralph A. Thompson
  • Bidirectional one-half rate counter
    Patent number: 4532643
    Abstract: A bidirectional counting circuit for use with a transducer producing two pulses per engineering unit includes an UP/DOWN counter which receives separate UP and DOWN input pulses from the transducer through respective AND gates. A synchronizing flip-flop, which switches states in response to either an UP or DOWN pulse, alternately enables the AND gates and effectively divides the input pulses by two. The state of the flip-flop is used to control a display digit to add the suffix "5" or "0" to the displayed counter content in order to display one-half engineering unit resolution. The circuit includes automatic and manual zeroing capability and a direction indicator.
    Type: Grant
    Filed: September 20, 1982
    Date of Patent: July 30, 1985
    Assignee: General Motors Corporation
    Inventor: Ralph A. Thompson