Patents by Inventor Sikke Havinga

Sikke Havinga 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).

  • Thermally controlled electrical switching device having a snap-action switch
    Patent number: 5870013
    Abstract: The invention relates to a thermally controlled electrical switching device including a temperature control (1) having a snap-action switch (2) including a fixed contact (4) and a movable contact (3) connected to a metal snap-action switching spring (9), and having a bimetallic element (5) which influences the movement of the movable contact. In order to minimize the heat produced in the mechanically loaded parts (17, 18) of the snap-action switching spring (9) the switching devices limits the current through these mechanically loaded parts. These devices may include an electrically well conductive layer (30) provided on the non-mechanically loaded parts of the snap-action switching spring or a layer (31) having a high electrical resistance deposited on the mechanically loaded parts (17, 18).
    Type: Grant
    Filed: October 10, 1995
    Date of Patent: February 9, 1999
    Assignee: U.S. Philips Corporation
    Inventors: Adriaan Van Der Grijn, Sikke Havinga