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APNOEA ALARMS

  • US 3,631,438 A
  • Filed: 09/30/1969
  • Issued: 12/28/1971
  • Est. Priority Date: 10/31/1968
  • Status: Expired due to Term
First Claim
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1. An apnoea alarm system comprising an air mattress having a plurality of separate compartments, air-connection means between said compartments, means for detecting differential changes in compression between different ones of said compartments, a sensory alarm, and a switch for operating the alarm in the absence of any change in compression of the mattress after a preset time period from a last detected change in compression.

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