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Class Information
Number: 219/497
Name: Electric heating > Heating devices > With power supply and voltage or current regulation or current control means > Automatic regulating or control means > Comprising voltage and/or current measuring and comparing or combining means
Description: Subject matter including means for deriving at least one first voltage, the magnitude of which is dependent upon some variable of a heated space or material, means for producing a second reference voltage representative of a desirable condition, means for comparing or combining the two derived voltages and further means whereby the condition of a heating device is adjusted by application of the voltage resulting from the combination or comparison of the two or more derived voltages.

Sub-classes under this class:

Class Number Class Name Patents
219/499 Including bridge means 116
219/498 Including follow-up servo means 5

Patents under this class:

Patent Number Title Of Patent Date Issued
8692167 Medical device heaters and methods Apr. 8, 2014
8680445 Field calibration of microwave oven Mar. 25, 2014
8680442 Systems and methods for a temperature-controlled electrical outlet Mar. 25, 2014
8653424 Compensation for induction heating in coil welding equipment Feb. 18, 2014
8642931 Adaptive temperature controller Feb. 4, 2014
8629378 Heating control device and method thereof Jan. 14, 2014
8624169 Electric grilling appliance Jan. 7, 2014
8618449 Method and apparatus for controlling phase of AC power and method of controlling heating element of fixing unit Dec. 31, 2013
8615374 Modular, configurable, intelligent sensor system Dec. 24, 2013
8614407 Method for supplying current to a glow plug Dec. 24, 2013
8610037 Cooking score thermometer Dec. 17, 2013
8610036 Device and method for monitoring a heating appliance Dec. 17, 2013
8598498 Processing controller for driving the heat sources of a cooker Dec. 3, 2013
8598494 Method for controlling power supply to the liquid contents of a cooking vessel Dec. 3, 2013
8592730 Heater assembly for suture welder Nov. 26, 2013
8581154 Method for effectuating temperature control in roller grills Nov. 12, 2013
8575522 Hot-air supplying device and hot-air supplying method having bypass Nov. 5, 2013
8555775 Method for operating of a boiler of a device such as a coffee maker Oct. 15, 2013
8552751 Method for determining the heating characteristic of a glow plug Oct. 8, 2013
8541720 Apparatus for remotely measuring surface temperature using embedded components Sep. 24, 2013
8541716 Heater control with high-limit thermal safety shutdown Sep. 24, 2013
8536495 Device for regulated water heating using the energy gained by photovoltaic cells Sep. 17, 2013
8530800 Heater control device, image forming apparatus, and computer program product Sep. 10, 2013
8525082 Method for performing an automatic cooking process Sep. 3, 2013
8513577 Device for controlling a thermo-electric system Aug. 20, 2013
8513576 Dual resistance heater for phase change devices and manufacturing method thereof Aug. 20, 2013
8513575 Utilization of overvoltage and overcurrent compensation to extend the usable operating range of electronic devices Aug. 20, 2013
8497453 Semiconductor device having variable parameter selection based on temperature Jul. 30, 2013
8487738 Method and apparatus for securely storing medical items within a thermal treatment system Jul. 16, 2013
8487221 Heat and/or light producing unit powered by a lithium secondary cell battery with high charge and discharge rate capability Jul. 16, 2013
8467668 Infrared room heater system Jun. 18, 2013
8450658 Semiconductor processing apparatus May. 28, 2013
8440942 Circuit arrangement for protection of a heating element from overheating heating device and method for fused protection of the heating device May. 14, 2013
8436279 System for supplementation of appliance standby mode with internal power source May. 7, 2013
8431876 System for controlled aging of electrical windings Apr. 30, 2013
8420985 Mirror and window de-fogging device Apr. 16, 2013
8415592 Oven and process to control the air-flow over the belt width in a spiral oven Apr. 9, 2013
8395095 Electrothermal transfer device and electrothermal transfer method Mar. 12, 2013
8383994 Transparency having sensors Feb. 26, 2013
8378272 Heat treatment apparatus, heat treatment method and storage medium Feb. 19, 2013
8378271 Utilization of overvoltage and overcurrent compensation to extend the usable operating range of electronic devices Feb. 19, 2013
8367980 Method for controlling the humidity level in a cooking oven Feb. 5, 2013
8367975 Temperature adjustment method Feb. 5, 2013
8362405 Heater controller of exhaust gas sensor Jan. 29, 2013
8344294 Method and cooking appliance for cooking according to the C-value Jan. 1, 2013
8309893 Switching apparatus and controller for an electric appliance that promotes extended relay life Nov. 13, 2012
8309892 Control system for operating automotive vehicle components Nov. 13, 2012
8309889 Electrical circuit Nov. 13, 2012
8304699 Proximity sensor Nov. 6, 2012
8304698 Thermal throttling of peripheral components in a processing device Nov. 6, 2012

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