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Apparatus and method for heating water for infusion and the like

  • US 5,183,998 A
  • Filed: 05/30/1990
  • Issued: 02/02/1993
  • Est. Priority Date: 05/30/1990
  • Status: Expired due to Term
First Claim
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1. Apparatus for heating water for infusing coffee or the like, said apparatus comprising:

  • heating means supplied by an A.C. power source;

    power control means for connecting said A.C. power source to said heating means;

    high power means for causing said power control means to apply full A.C. power to said heating means when a high power is required for the operation of said apparatus;

    low power means for causing said power control means to apply a portion of subsequent AC cycles to said heating means when a lower power is required, said low power means comprising phase delay means for limiting the application of A.C. power to the portion of subsequent A.C. cycles; and

    said power control means including triac means for receiving a control signal from either the high power means or the low power means for applying A.C. power from an A.C. power source to said heater means; and

    trigger means having inputs operatively connected to said high power means and to said low power means and whose output is operatively connected to the gate of said triac means, said trigger means generating a current spike for enabling said triac means during each half of an A.C. voltage cycle.

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