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Class Information
Number: 373/109
Name: Industrial electric heating furnaces > Resistance furnace device
Description: Subject matter including electrical resistance means as the heating element.

Sub-classes under this class:

Class Number Class Name Patents
373/115 Charging or discharging 40
373/135 Control 31
373/113 For cooling 28
373/116 For manipulation of the charge or melt (e.g., stirring) 21
373/137 Lining 82
373/117 With heating element detail 58
373/110 With internal atmosphere control (e.g., pressure, vacuum, etc.) 52

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
4247734 Flexible thermocouple for vacuum electric furnaces Jan. 27, 1981
4033564 Crucible for melting, heat retention and pouring of metals Jul. 5, 1977

1 2

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