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Class Information
Number: 219/488
Name: Electric heating > Heating devices > With power supply and voltage or current regulation or current control means > With voltage limitation, conversion, or adapting means
Description: Subject matter including means whereby a supply voltage of a first value may be maintained within given limits, may be converted to a second different value or means whereby a heating device adapted to operate on an alternating voltage may be adapted to operate on a D.C. voltage or vice versa.

Patents under this class:

Patent Number Title Of Patent Date Issued
8598497 Cooking temperature and power control Dec. 3, 2013
8436279 System for supplementation of appliance standby mode with internal power source May. 7, 2013
8338758 Heater power control circuit and burn-in apparatus using the same Dec. 25, 2012
8173938 Controller for a heating cable May. 8, 2012
7928345 Aircraft windshield defogging/deicing system and method of use thereof Apr. 19, 2011
7683294 Multistage control system of positive temperature coefficient heater and method thereof Mar. 23, 2010
7534978 Process chamber of an installation for the thermal treatment of printed circuit boards May. 19, 2009
7387114 Heating device for a fluid line and method of manufacture Jun. 17, 2008
7323664 Heating system Jan. 29, 2008
7081601 Voltage selection mode for a cooking appliance Jul. 25, 2006
7002114 Methods and apparatus for a variable resistor configured to compensate for non-linearities in a heating element circuit Feb. 21, 2006
6875955 Thermal activation device for heat-sensitive self-adhesive sheet and a printer assembly Apr. 5, 2005
6692518 Patient temperature control system Feb. 17, 2004
6642486 Method and apparatus for replicating heat profile of infrared oven Nov. 4, 2003
6441352 Apparatus for electrically heat welding thermoplastic fittings and method of using the same Aug. 27, 2002
6271505 Field conversion electric water heater Aug. 7, 2001
5723846 Multiprobe intelligent diagnostic system for food-processing apparatus Mar. 3, 1998
5628928 Method for reducing the potential difference in an electrically heatable converter by connecting the strip heater to corrugated strip with an electrical conductor May. 13, 1997
5607610 Compact protector Mar. 4, 1997
5416300 Electric igniter actuator with network voltage clocking to pass only a portion of the wave trains to the igniter May. 16, 1995
4742210 Electric heating apparatus having a universal electrical connector May. 3, 1988
4731519 Curling iron adapted to provide uniform heat when used with either domestic or foreign voltages Mar. 15, 1988
4581522 Electrical heating system including a mesh heating element Apr. 8, 1986
4439666 Electrical heating system Mar. 27, 1984
4267430 Dual-voltage electric hair curling apparatus and vanity case therefore May. 12, 1981
4238672 Temperature control circuitry Dec. 9, 1980
4217483 Terminal block for single phase or three phase wiring of an immersion heater assembly and methods of wiring Aug. 12, 1980
4065659 Food processing oven Dec. 27, 1977

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