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Radio wave receiving signaling device

  • US 6,020,819 A
  • Filed: 02/12/1998
  • Issued: 02/01/2000
  • Est. Priority Date: 07/29/1994
  • Status: Expired due to Fees
First Claim
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1. A radio wave receiving signaling device comprising:

  • a radio wave receiving antenna (22) having a coil (22a);

    an electrically capacitive buzzer (21);

    alarm output means (AO) for activating the buzzer (21) to generate sound when the receiving antenna (22) receives a sound generation instructing signal; and

    the buzzer (21) and the entire or part of the coil (22a) of the receiving antenna (22) being connected to form a booster circuit to raise a voltage to be applied to said buzzer (21) by means of a resonance function.

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