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Swimmer location monitor

  • US 5,907,281 A
  • Filed: 05/05/1998
  • Issued: 05/25/1999
  • Est. Priority Date: 05/05/1998
  • Status: Expired due to Fees
First Claim
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1. A low frequency electromagnetic surveillance system for tracking the location of swimmers who may be in danger comprising:

  • a means for detecting potential or actual swimmer distress for each swimmer equipped with an individual Swimmer Location Monitor (SLM) wherein said means triggers a pulsed low frequency alarm transmission when specified thresholds monitored by said SLM are exceeded;

    a means for generating an electromagnetic field through the water from a transmitter contained in the SLM wherein said electromagnetic field is subsequently transmitted;

    a means for receiving said magnetic field transmission;

    a means for amplifying, filtering and processing the received signals resulting in a display of the distressed swimmer'"'"'s location; and

    a means for triggering an audible alarm whenever said specified thresholds are exceeded.

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