Patents by Inventor Dennis K. Karr

Dennis K. Karr 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).

  • Miniature thermal switch elongated bimetallic element
    Patent number: 4660016
    Abstract: A thermal switch utilizes a bimetallic element which has first and second layers which each have a length greater than the width thereof. The bimetallic element operates a switching contact and is mounted in free floating relationship within a housing.
    Type: Grant
    Filed: March 15, 1985
    Date of Patent: April 21, 1987
    Assignee: North American Philips Corporation
    Inventor: Dennis K. Karr
  • Simple thermostat for dip mounting
    Patent number: 4620175
    Abstract: A bistable bimetallic element is captured loosely between a housing cover on the one side, and an interior abutment and an end of a movable contact arm on the other side. A dimple in the housing cover provides a fulcrum for the bistable element, so as to permit a large throw of the compact arm and thus a high breakdown voltage rating.
    Type: Grant
    Filed: October 11, 1985
    Date of Patent: October 28, 1986
    Assignee: North American Philips Corporation
    Inventors: Dennis K. Karr, David A. Sprankle