Patents by Inventor Michael Hammecke

Michael Hammecke 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).

  • Railway track switch heating arrangement
    Patent number: 3974993
    Abstract: A railway track switch is provided with an arrangement for preventing the accumulation on the track switch of snow such as could cause blockage of a moving part of the track switch or other malfunction. The arrangement includes a controllable track switch heating unit operative when activated for heating at least a part of the track switch, and a capacitive snow-detecting unit arranged in proximity to the track switch. The snow-detecting unit detects accumulated snow or ice, and the operation of the track switch heating unit is automatically controlled in dependence upon such detection.
    Type: Grant
    Filed: June 9, 1975
    Date of Patent: August 17, 1976
    Assignee: Eltra KG Leicht & Trambauer
    Inventor: Michael Hammecke