Patents by Inventor Harold Leeming

Harold Leeming 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).

  • Method of using embedded normal stress sensors in propellant grains
    Patent number: 4120195
    Abstract: An embedded stress sensor gage for use in solid fuel rocket motors and the like consisting of a modified bridge circuit containing temperature sensitive resistive elements and a pair of series connected resistors coupled in parallel with the bridge. A comparison of the voltage at the midpoint of the series connected resistors and the output voltage of the bridge and the voltages at the active resistive elements provides information from which it is possible to determine the change in gage element resistance for each temperature and stress condition.
    Type: Grant
    Filed: August 11, 1977
    Date of Patent: October 17, 1978
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Harold Leeming