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Child monitor system

  • US 5,689,240 A
  • Filed: 06/05/1996
  • Issued: 11/18/1997
  • Est. Priority Date: 06/05/1996
  • Status: Expired due to Fees
First Claim
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1. A child monitoring system adapted to activate an alarm when the child strays from the supervisor, comprising:

  • (a) a master unit including a power supply, first alarm means for emitting an audible alarm, transmitting means for transmitting a first encoded signal, and detecting means for detecting a second encoded signal all of which are electrically coupled to an electronic circuit contained within said master unit;

    (b) a remote unit including a power supply, second alarm means for emitting an audible alarm, transmitting means for transmitting the second encoded signal, and detecting means for detecting the first encoded signal, whereby the first alarm means is activated when the master unit fails to receive the second encoded signal for more than a first predetermined time interval and the second alarm means is activated when the remote unit fails to receive the first encoded signal for more than a second predetermined time interval;

    (c) key means electrically coupled to said remote unit, wherein the transmitting means of the second encoded signal is activated when the key means is removed from the remote unit and(d) wherein the transmitting means of the first encoded signal is activated when the key means is inserted into a corresponding receptacle of the master unit.

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