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Class Information
Number: 373/135
Name: Industrial electric heating furnaces > Resistance furnace device > Control
Description: Subject matter including circuitry for regulating the furnace operation.

Sub-classes under this class:

Class Number Class Name Patents
373/136 Temperature 31

Patents under this class:

Patent Number Title Of Patent Date Issued
6936792 Furnace cart and load transfer system for high temperature vacuum furnaces and process therefor Aug. 30, 2005
6642486 Method and apparatus for replicating heat profile of infrared oven Nov. 4, 2003
6510672 Tubular graphite body capable of storing hydrogen gas and its manufacturing method Jan. 28, 2003
6274851 Electric arc furnace controller Aug. 14, 2001
6038247 Graphitizing electric furnace Mar. 14, 2000
5317592 Direct resistance heating electrical furnace assembly and method of operating same May. 31, 1994
5293404 Thermal measuring and testing system having synchronized sample transporting means Mar. 8, 1994
5291514 Heater autotone control apparatus and method Mar. 1, 1994
5267257 Vacuum furnace with convection heating and cooling Nov. 30, 1993
5190901 Method for producing active carbon using carbon-containing material Mar. 2, 1993
5003160 Reflow furnace control system Mar. 26, 1991
4523321 Vertical carbonizing furnace for use in the production of carbon fibers Jun. 11, 1985
4421976 System for monitoring heater elements of electric furnaces Dec. 20, 1983
4367866 Furnace adapted to contain molten metal Jan. 11, 1983
4337373 Furnace for fusing vanadium pentoxide powder Jun. 29, 1982
4293730 Method and apparatus for detecting a ground on electric furnaces Oct. 6, 1981
4268708 Apparatus for vacuum sintering and hot isostatic pressing May. 19, 1981
4225744 Fixed thermocouple for vacuum electric furnaces Sep. 30, 1980
4158742 General purpose rocket furnace Jun. 19, 1979
4135053 Heating assembly for a heat treating furnace Jan. 16, 1979
4133969 High frequency resistance melting furnace Jan. 9, 1979
4127737 Apparatus for reactivation of active carbon and the like Nov. 28, 1978
4124199 Process and apparatus for case hardening of ferrous metal work pieces Nov. 7, 1978
4052195 Method for melting iron-containing material Oct. 4, 1977
4041236 Furnace having ceramic heating elements Aug. 9, 1977
4020273 Vertical pyrolysis furnace for use in the production of carbon fibers Apr. 26, 1977
4011430 Multizone electrical furnace methods and apparatus Mar. 8, 1977
4001487 System for supplying current to a group of high-current resistance furnaces through a plurality of transformers Jan. 4, 1977
3971679 Method of annealing oriented silicon steel Jul. 27, 1976
3958936 Plastics sterilizer and melter having an afterburner May. 25, 1976
3941900 Method for producing highly pure silicon Mar. 2, 1976

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