Patents by Inventor Joshua L. Levine

Joshua L. Levine 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).

  • Device for measurement of the torsional angular deviation of a loaded rotating or static shaft
    Patent number: 4433585
    Abstract: A torsional angular deviation measuring device comprising a first diffraction grating which is placed at one end of a shaft and a second diffraction grating placed at the other end or at least some distance from the first end. A beam of light from a light source is then passed through the first diffraction grating generating zeroth order and other order beams. The beams are thence passed through collimating optics and then through the second diffraction grating. The beams from the second diffraction grating are sensed by split photodiodes and the amount of angular deviation is then measured by comparing the phases of pulse trains generated from the different photodiodes with one another.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: February 28, 1984
    Assignee: North American Philips Corporation
    Inventor: Joshua L. Levine