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Child alarm

  • US 5,652,569 A
  • Filed: 09/02/1994
  • Issued: 07/29/1997
  • Est. Priority Date: 09/02/1994
  • Status: Expired due to Fees
First Claim
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1. A range sensitive system comprising:

  • an RF transmitter assembly located on a guardian having a periodic signal generating means, a manual signal generating means, a transmitting means, and a signal encoding means, functioning to encode said periodic and manual signals;

    an RF receiver assembly located on a child or object functioning to receive an RF signal from said transmitting means up to a preset distance from the transmitting means, a decoder means which receives said encoded signals, a reset timer means which resets when said periodic signal is received, and an alarm means which activates when said reset timer means times out and when said manual signal is received; and

    said RF transmitter assembly and RF receiver assembly each further comprising a portable power means.said RF transmitter assembly further comprises a timer, and a multi-channel signal generating means; and

    said multi-channel signal generating means comprises a channel selector switch and a channel selector timer.

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