Patents Assigned to Thomas Orr
  • Transducers
    Patent number: 4091803
    Abstract: A transducer for optically detecting a cyclic phenomenon of variable frequency and supplying an electric signal corresponding to the frequency, comprises a light source for illuminating the site of the phenomenon and a detector for detecting variations in the level of light reflected from the site of the phenomenon and providing the required electric signal, the detector being a semiconductor opto-electronic cell and the light source being positioned within the detector.
    Type: Grant
    Filed: February 9, 1976
    Date of Patent: May 30, 1978
    Assignee: Thomas Orr
    Inventor: Russell Stuart Pinder