Patents by Inventor Thomas H. Vaughn

Thomas H. Vaughn 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).

  • Patent number: 5274348
    Abstract: An electromagnetic relay to be used in applications such as DC motor reversing. The relay consists of two electromagnetic devices in a single enclosure with contacts configured in a so-called "H-bridge" circuit. Each of the devices has a movable contact element, while both devices have a common pair of normally closed and normally open stationary contact elements. Both electromagnetic devices have coil bobbins which are preferably identical in shape and are locked together by means of the common stationary contact elements without a need of additional fastening means. In this manner, the number of parts is minimized and the amount of adjustment required is reduced.
    Type: Grant
    Filed: February 19, 1992
    Date of Patent: December 28, 1993
    Assignee: Potter & Brumfield, Inc.
    Inventors: Richard A. Vernier, Thomas H. Vaughn