Patents by Inventor Lawrence H. Johnston

Lawrence H. Johnston 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).

  • Detonating apparatus
    Patent number: 3955505
    Abstract: 1. Apparatus for detonation of high explosive in uniform timing comprising in combination, an outer case, spark gap electrodes insulatedly supported in spaced relationship within said case to form a spark gap, high explosive of the class consisting of pentaerythritol tetranitrate and trimethylene trinitramine substantially free from material sensitive to detonation by impact compressed in surrounding relation to said electrodes including said spark gap under a pressure from about 100 psi to about 500 psi, said spark gap with said compressed explosive therein requiring at least 1000 volts for sparking, and means for impressing at least 1000 volts on said spark gap.
    Type: Grant
    Filed: May 31, 1950
    Date of Patent: May 11, 1976
    Assignee: The United States of America as represented by the United States Energy Research and Development Administration
    Inventor: Lawrence H. Johnston