Patents by Inventor Philip M. Gretzkowski

Philip M. Gretzkowski 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).

  • Microbending optical fiber accelerometer and gyroscope
    Patent number: 4743116
    Abstract: There is provided by this invention a fiber optic transducer for accelerometers and gyroscopes that utilize microbending of an optical fiber between two suspended points by vibrating the optical fiber with electro-static deflection to induce modulation of a light signal to sense acceleration, tension, etc. The amplitude modulation of the light signal induced by the bending lost in the vibrating fiber is demodulated with respect to reference signals to derive an output proportional to acceleration, tension, or other environmental factors.
    Type: Grant
    Filed: October 7, 1985
    Date of Patent: May 10, 1988
    Inventors: Eric Udd, Philip M. Gretzkowski, Keith H. Wanser