Patents by Inventor Haydn A. Leonard

Haydn A. Leonard 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).

  • Monitoring devices
    Patent number: 4246456
    Abstract: A monitoring device is provided for monitoring the gap between two relatively moving parts. In its preferred form the device consists of a bar of fracturable material mounted on one part and extending towards the other. A striker mounted on the other part is provided to hit and fracture the bar when the gap separation reduces by a predetermined amount. The bar is weakened at a position where fracture is desired and a conductive track is provided across the line of fracture which track is rendered open circuit as fracture occurs.
    Type: Grant
    Filed: May 7, 1979
    Date of Patent: January 20, 1981
    Assignee: The Marconi Company Limited
    Inventor: Haydn A. Leonard