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Control for an electric heating device for providing consistent heating results

  • US 5,844,207 A
  • Filed: 05/03/1996
  • Issued: 12/01/1998
  • Est. Priority Date: 05/03/1996
  • Status: Expired due to Fees
First Claim
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1. An electrical device for generating heat for a predetermined period of time, said electrical device comprising:

  • a. a heating cavity;

    b. a heating element powered by an operating voltage having a magnitude, said heating element being disposed within said heating cavity;

    c. a first circuit which generates a control voltage wherein said control voltage varies as a function of said magnitude of said operating voltage; and

    d. a second circuit, coupled to said first circuit, which varies the duration of said period of time as a function of said control voltage generated by said first circuit, wherein said period of time is lengthened when said magnitude of said operating voltage decreases and shortened when said magnitude of said operating voltage increases.

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