Patents by Inventor Joseph Wandrack

Joseph Wandrack 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).

  • Fiber optic light valve
    Patent number: 4283114
    Abstract: A mechanically actuated, piezoelectrically powered, fiber optic connected ght valve (shutter) utilized as a sensor to detect mechanical motion (pressure) or displacement. A piezoelectric element responds to pressure to generate an electrical signal which is applied to a Kerr cell containing nitrobenzene; the signal in turn renders the nitrobenzene transparent and light via fiber optic means is allowed to pass through the Kerr cell and return to the light source location for sensing.
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: August 11, 1981
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Joseph Wandrack