Patents by Inventor John J. Critcher

John J. Critcher 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).

  • Directional fuze selector apparatus for artillery delivered mines
    Patent number: 4205609
    Abstract: A gravity sensing disc slide interrupter in combination with dual chambered etonating booster charges is used to automatically select one of a plurality of mine covers to be removed from a randomly ground oriented mine in order to insure maximum leathality against a target. Reliable selection of the mine cover to be explosively removed is accomplished by reduction of gap distance between the output side of a transfer lead charge and the input side of detonating fuze booster charges.
    Type: Grant
    Filed: July 5, 1978
    Date of Patent: June 3, 1980
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Patrick E. Sweeney, John J. Critcher