Patents by Inventor Thomas J. Lenken

Thomas J. Lenken 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: 4081999
    Abstract: A thermometer having temperature limit indication includes a support plate having a bimetal coil secured to the plate by a suitable hub. A pointer arm is extended from the bimetal coil and positioned across a temperature scale on the plate in accordance with the sensed temperature. A portion of the plate is bent outwardly to define an inclined plane member at a selected temperature limit and in the path of the pointer arm. The coil mounted pointer has sufficient resiliency to permit movement over the inclined plane while insuring latching behind such bent outwardly portion if at the temperature limit. A plurality of spaced bent outwardly members may be provided to indicate various limits.The inclined plane member may be a separate adjustable element to permit adjustment of the temperature limit position.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: April 4, 1978
    Assignee: Desco Corporation
    Inventor: Thomas J. Lenken