Patents by Inventor Robert J. Harruff

Robert J. Harruff 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).

  • Numeric display using three endless belts
    Patent number: 3965593
    Abstract: Any numeric display (0-9) can be obtained by rotating the three endless belts to position the indicia on each to combine with the others to form the desired numeral. Each belt has a plurality of faces or display areas along its length and is driven by a separate motor until a sensing means determines the proper face is in display position. The belts follow a serpentine path to permit the belts to be housed in a frame about as high as the numeric readout. A change in the readout can be programmed and initiated at a remote location.
    Type: Grant
    Filed: November 18, 1974
    Date of Patent: June 29, 1976
    Assignee: General Indicator Corporation
    Inventor: Robert J. Harruff