×

Apparatus and method for sleep detection

  • US 4,297,685 A
  • Filed: 05/31/1979
  • Issued: 10/27/1981
  • Est. Priority Date: 05/31/1979
  • Status: Expired due to Term
First Claim
Patent Images

1. Apparatus for detecting the onset of sleep in a human being, said apparatus comprising:

  • means, including a temperature responsive sensor, for measuring the temperature within the auditory canal of said human being;

    differentiator means interconnected with said temperature measuring means for generating the time rate of change of said temperature; and

    comparator means for producing an output signal when said time rate of change of said temperature exceeds a predetermined value.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×