Patents by Inventor Earl E. Dalrymple

Earl E. Dalrymple 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).

  • Switchable electrical connector
    Patent number: 4120552
    Abstract: A switchable electrical connector for use in explosion prone environments is disclosed. The connector utilizes two pairs of electrical connectors; the first pair provides a circuit switching function while the second pair permits the removable connection of a suitable load. Sealing means are used for the first pair of electrical connectors to isolate any switching arcs from the environment. A mechanically actuated interlock is employed to prevent electrical engagement of the first pair of connectors before engagement of the second pair of connectors and to prevent disengagement of the second pair of connectors before the disengagement of the first pair of connectors.
    Type: Grant
    Filed: July 7, 1977
    Date of Patent: October 17, 1978
    Assignee: Anderson Power Products, Inc.
    Inventors: Edward D. Winkler, Earl E. Dalrymple