US PATENT SUBCLASS 219 / 446.1
.~.~.~ Having sensor

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

200  DF  HEATING DEVICES {14}
385  DF  .~ Combined with container, enclosure, or support for material to be heated {12}
443.1  DF  .~.~ Exposed horizontal planar support surface for material to be heated (e.g., hot plate, etc.) {13}
446.1.~.~.~ Having sensor {2}
447.1  DF  .~.~.~.~> Responsive to presence of material (e.g., food, a cooking vessel, etc.)
448.11  DF  .~.~.~.~> Responsive to temperature {4}

DEFINITION

Classification: 219/446.1

Having sensor:

(under subclass 443.1) Subject matter including means to detect a condition of the heating device or material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

490+, for a heating device having automatic regulation or control of a power supply s voltage or current.

509+, for a heating device having an automatically operated power current connection and/or disconnection means (e.g., switch, etc.).

SEE OR SEARCH CLASS

99, Foods and Beverages: Apparatus,

325+, for a timing or condition-responsive control means for cooking apparatus.

200, Electricity: Circuit Makers and Breakers, for generic circuit maker and breaker structure. 307, Electrical Transmission or Interconnection Systems,

116+, for a condition-responsive residual switching system.

323, Electricity: Power Supply or Regulation Systems, for a generic class of electrical systems wherein a single

electrical source is coupled to a single electrical load circuit and means are provided which control the magnitude or level of the current or voltage of either or both of said circuits, especially

236, for other than an electrical zero switching output level condition responsive (e.g., heat, etc.) circuit.

340, Communications: Electrical,

577+, for flame condition-responsive system, subclasses 584+ for a thermal condition-responsive system, subclass 600 for radiant energy condition-responsive system, subclasses 635+ for electrical apparatus condition-responsive system, especially subclass 640 for a heater element condition-responsive system, or subclass 655 for a condition-responsive system indicating heating circuit energization.