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DATA ENTRY DEVICE

  • US 3,815,127 A
  • Filed: 03/20/1973
  • Issued: 06/04/1974
  • Est. Priority Date: 03/20/1973
  • Status: Expired due to Term
First Claim
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1. A data entry device comprising a plurality of pairs of sensors;

  • input circuit means connected to each of said pairs of sensors, said input circuit means having a plurality of outputs, each output being associated with one pair of sensors, said input circuit means being responsive to the actuation of a sensor to provide a first signal at the output associated with the pair of sensors containing the actuated sensor, said first signal having a characteristic representative of the actuated one of the respective pair of sensors;

    level detector means;

    scanner means connected between said input circuit means and said level detector means for sequentially scanning said plurality of outputs of said input circuit means to provide said first signals to said level detector means;

    said level detector means being responsive to said first signal for detecting the pair of sensors containing the actuated sensor;

    output means responsive to operation of said level detector means and said scanner means for providing a first output signal representative of the pair of sensors containing the operated sensor; and

    characteristic detector means responsive to the said characteristic of said first signal for providing a second output signal representative of the actuated sensor of said pair of sensors.

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