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Personal dosimeter with reminder time

  • US 4,320,393 A
  • Filed: 12/19/1979
  • Issued: 03/16/1982
  • Est. Priority Date: 06/07/1978
  • Status: Expired due to Term
First Claim
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1. A dosimeter comprising:

  • means sensitive to radiation for producing a first alarm signal when a certain radiation dose is reached or exceeded; and

    time measuring means for producing a second alarm signal when a surveillance period has expired, the second alarm signal being different from the first alarm signal and the expiration of the surveillance period being detected by a drop in voltage occurring at the end of the discharge of an energy source.

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