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Class Information
Number: 219/508
Name: Electric heating > Heating devices > With current connection and/or disconnection means (e.g., switch) > Plural means intermittently or selectively operated
Description: Subject matter comprising two or more circuit connecting and disconnecting means. The claimed means may consist of a single main switch relay, for example, which in turn is controlled by the condition of a plurality of secondary means which operate in sequence periodically or selectively.

Patents under this class:
1 2 3 4 5 6 7

Patent Number Title Of Patent Date Issued
8660701 Modular control system and method for water heaters Feb. 25, 2014
8598494 Method for controlling power supply to the liquid contents of a cooking vessel Dec. 3, 2013
8598498 Processing controller for driving the heat sources of a cooker Dec. 3, 2013
8558147 Shaped heater for an aerosol generating system Oct. 15, 2013
8548312 High efficiency high accuracy heater driver Oct. 1, 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
8450659 Control system and method for high density universal holding cabinet May. 28, 2013
8367979 Cooking platform and related method Feb. 5, 2013
8237094 Pulse modulation heating system and method Aug. 7, 2012
8225708 Multi-beverage brewer with on-demand variable brew water temperature and method Jul. 24, 2012
8178821 Substrate treating apparatus May. 15, 2012
8119953 Heating control system using a fluid level sensor and a heating control element Feb. 21, 2012
8084715 Method and means for heating and controlling the temperatures in a sauna Dec. 27, 2011
8008605 Electronic power control for cooktop heaters Aug. 30, 2011
8008603 Boiler protection apparatus and method Aug. 30, 2011
8003923 Household appliance with display that is raised from a surface Aug. 23, 2011
7947929 Control apparatus for dryer May. 24, 2011
7902486 Air conditioner, method of controlling the same, temperature setting device and method of controlling the same Mar. 8, 2011
7723647 Information communication systems between components of a hot melt adhesive material dispensing system May. 25, 2010
7652230 Operating device for an electrical appliance having a control panel and subadjacent sensor element and method of operating such an operating device Jan. 26, 2010
7629559 Method of improving electrical connections in circuitized substrates Dec. 8, 2009
7626145 Redundant control circuit for hot melt adhesive hose assembly heater circuits and temperature sensors Dec. 1, 2009
7605351 Redundant control circuit for hot melt adhesive hose assembly heater circuits and temperature sensors Oct. 20, 2009
7598476 Image forming apparatus having improved flicker characteristics and method thereof Oct. 6, 2009
7595467 Fault detection system and method for managing the same Sep. 29, 2009
7589299 Electronic power control for cooktop heaters Sep. 15, 2009
7566846 Multi-zone blanket arrangement Jul. 28, 2009
7547863 System and method for control of supplemental appliances Jun. 16, 2009
7507937 Electronic power control for cooktop heaters Mar. 24, 2009
7417208 Power supply device Aug. 26, 2008
7402780 Thermostat for a heat pump or conventional heating system Jul. 22, 2008
7368686 Apparatus and methods for operating an electric appliance May. 6, 2008
7351937 Control circuits for hot melt adhesive heater circuits and applicator heads Apr. 1, 2008
7345259 Circuit arrangement and method for preventing overheating of a cooking appliance Mar. 18, 2008
7335861 Cooking stove Feb. 26, 2008
7332692 Redundant control circuit for hot melt adhesive assembly heater circuits and temperature sensors Feb. 19, 2008
7326887 Modified reset motor protector Feb. 5, 2008
7319209 Cooker control mechanism Jan. 15, 2008
7301129 Control circuit for semiconductor device having overheating protection function Nov. 27, 2007
7199335 Heat fusing apparatus, method of controlling same and image forming apparatus Apr. 3, 2007
7193188 Temperature control system for controlling heat treatment of metals, that is heating, soaking and cooling by a single frequency converter Mar. 20, 2007
7180038 Device for switching on and off several heating mechanisms of cooking equipment as well as cooking equipment with such a device Feb. 20, 2007
7176418 Cooking stove Feb. 13, 2007
7122767 Method for controlling power supply to fixing roller in image forming apparatus Oct. 17, 2006
7115843 High-frequency pulse oscillator Oct. 3, 2006
7084377 Heated device and method of redundant temperature sensing Aug. 1, 2006
7022943 Engine block heater system and method of operation Apr. 4, 2006
6998585 Control unit for a household appliance Feb. 14, 2006
6987250 Control circuit for kitchen appliances Jan. 17, 2006

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