Patents by Inventor Charles A. Maltby

Charles A. Maltby 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).

  • Apparatus for sensing direction of rotation
    Patent number: 4758769
    Abstract: Direction of rotation of a device is sensed by means of a rotor which is coupled to the device and which carries at least two permanent magnets which are angularly spaced and present opposite magnetic poles to two sensors. One of the sensors is responsive to one only of the magnetic polarities to produce a voltage signal and the other sensor produces a voltage signal whose polarity is dependent on the polarity and direction of rotation of the magnet which induces that signal. The two detector voltage are compared and their correspondence or otherwise indicates the direction of rotation.
    Type: Grant
    Filed: December 2, 1986
    Date of Patent: July 19, 1988
    Assignee: Lucas Industries Public Limited Company
    Inventors: Thomas F. Carrigan, Charles A. Maltby