Patents Assigned to International Standard Electric Company
  • Switch device
    Patent number: 4691117
    Abstract: A contactless electrical switch includes a switch element comprising a piezo-resistive transducer (25). Coded toothed cams (16) operated via a shaft (14) deflect the transducer (25) causing corresponding changes in stress and hence resistance. The output of the transducer is amplified and fed to logic circuitry which determines a corresponding current path.
    Type: Grant
    Filed: March 3, 1986
    Date of Patent: September 1, 1987
    Assignee: International Standard Electric Company
    Inventors: John C. Greenwood, Robert J. Hodges, Robert Sheppard
  • Method of addressing liquid crystal displays
    Patent number: 4638310
    Abstract: A matrix array type liquid crystal device whose liquid crystal layer is ferro-electric is addressed using strobing pulses applied serially to the members of a set of electrodes on one side of the layer while balanced bipolar data pulses are applied in parallel to the members of a set of electrodes on the other side. The data pulses are twice the length of the strobing pulses. This provides a way of minimizing the exposure of the pixels to `wrong` voltages between consecutive addressing that would tend to drive them to their opposite states.
    Type: Grant
    Filed: September 6, 1984
    Date of Patent: January 20, 1987
    Assignee: International Standard Electric Company
    Inventor: Peter J. Ayliffe