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Method of and apparatus for the acoustic signalling of cases of drowning in swimming pools

  • US 4,853,691 A
  • Filed: 12/21/1987
  • Issued: 08/01/1989
  • Est. Priority Date: 03/21/1987
  • Status: Expired due to Fees
First Claim
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1. A system for monitoring a swimming pool having water therein to a selected surface level, the system activating an audible warning device in response to a person jumping or falling into the swimming pool, the system comprising:

  • a hollow, frusto-conical disturbance collector having a first end opening which is relatively wide and a second end opening which is relatively narrow;

    means for supporting the collector beneath the surface level of the water in the pool with the axis of the collector extending horizontally and the collector positioned in spaced relation to a wall of the pool with the first end opening facing away from the wall and the second end opening facing the wall;

    a flap pivoted by a horizontal hinge adjacent the second end opening of the collector for pivoting upon impact by a submerged pressure wave generated upon a person jumping or falling into the pool, the flap being isolated by the frusto-conical collector from small surface disturbances created by leaves, stones or the like falling into the pool;

    a switching element secured to the flap for emitting a signal upon moving with the flap;

    circuit means connected to the switching element for detecting the signal; and

    alarm means connected to the circuit means for emitting an audible alarm upon the circuit means detecting the signal.

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