Automatic Regulating Or Control Means Patents (Class 219/490)
Combined (e.g., electromechanical and thermal) (Class 219/491)
Comprising timing or cycling means (Class 219/492)
Thermally responsive (Class 219/494)
Pressure responsive (Class 219/496)
Comprising voltage and/or current measuring and comparing or combining means (Class 219/497)
Including electron or glow-discharge tube means (Class 219/500)
Including semiconductor means (e.g., transistor) (Class 219/501)
Utilizing light-sensitive and/or responsive means (Class 219/502)
Inductive reactor means (e.g., auto transformer) (Class 219/503)
Comprising variable resistance means (Class 219/504)
With signal or indicating means (Class 219/506)
  • Temperature limiting wattage control for a ceramic cooking platform
    Patent number: 3946201
    Abstract: A sensor, located to respond to the temperature of the cooking platform and having a positive temperature coefficient of resistance throughout a range of temperatures up to the maximum selected safe operating temperature of the platform, is connected to a thermal cycling control switch and provides an increasing resistance with an increasing platform temperature to effect a wattage limiting control of the heating element supplying heat to the platform.
    Type: Grant
    Filed: February 27, 1975
    Date of Patent: March 23, 1976
    Assignee: White-Westinghouse Corporation
    Inventor: George L. Hetrick