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Apparatus and method for maintaining operator alertness

  • US 3,922,665 A
  • Filed: 10/04/1974
  • Issued: 11/25/1975
  • Est. Priority Date: 10/04/1974
  • Status: Expired due to Term
First Claim
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1. An apparatus for intermittently detecting operator alertness and altering stimuli in response to the detected degree of operator alertness, comprising:

  • means for initiating successive intermittent first stimuli detectable by the operator;

    response means actuated by the operator upon detection of each such first stimulus; and

    , detection means responsive to the initiation of each stimulus and the actuation of said response means for selectively modifying subsequent stimuli in inverse proportion to the operator alertness indicated by the detected actuation of the response means by the operator.

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