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CLASS 373 INDUSTRIAL ELECTRIC HEATING FURNACES 373 - 1 1
CLASS 373 INDUSTRIAL ELECTRIC HEATING FURNACES
373 - 1
1
PLURAL DIVERSE HEATING MEANS 2
.Arc 3
..With resistance 4
..With induction 5
.Resistance 6
..With induction 7
.Induction 8
ENVIRONMENTAL CONTROL 9
.Arc furnace 10
ELECTRON BEAM FURNACE DEVICE 11
.Vaporizing furnace 12
..Power supply and control circuit 13
..Gun assembly 14
...With deflection control 15
.Ingot remelting 16
.With plural beam devices 17
.Zone melting 18
PLASMA FURNACE DEVICE 19
.Indirect heating 20
..Rotary furnace 21
.Remelting furnace (i.e., ingot remelting) 22
.Direct furnace (i.e., plasma flame impinges on the melt) 23
..Expanded arc column 24
..Sidewall mounted plasmatron 25
..Control system 26
GLOW DISCHARGE FURNACE DEVICE 27
GLASS FURNACE DEVICE 28
.Filament discharge (i.e., bushing) 29
.Joule effect heating 30
..Furnace body detail 31
...Multi-chamber 32
....With heating between chambers 33
..Charging or discharging 34
...Including batch pre-heating 35
...Including discharge area heating 36
..Electrode assembly 37
...Protection means 38
...Holder 39
..Electrical system 40
...Regulation 41
...Electrode arrangement (e.g., array) 42
ELECTROSLAG REMELTING DEVICE 43
.Plural furnace units 44
.Body detail 45
..Crucible 46
.Start-up 47
.Power supply system 48
..Conductor arrangement 49
..Control 50
...By changing electrode position 51
.Electrode replacement 52
.Electrode support 53
..Plural electrodes 54
.Electrode 55
..With protective shield 56
WITH CONDENSATING DEVICE 57
.Including resistance furnace detail 58
..With open circuit (i.e., charge internal resistance heating) 59
.Including induction furnace detail 60
ARC FURNACE DEVICE 61
.Indirect 62
..Arc between spaced electrodes 63
...Charge fed into space 64
...With arc deflection means 65
..Arc between electrode and crucible exterior 66
..Combined with or convertible to direct arc furnace 67
.Ingot remelting 68
..With internal atmosphere control (e.g., pressure,

vacuum, etc.) 69
..With electrode holder or guide 70
..With power regulation 71
.Furnace body detail 72
..Hearth or crucible 73
..Roof 74
...With cooling 75
..Sidewall 76
...With cooling 77
..With internal atmosphere control (e.g., pressure,

vacuum, etc.) 78
.Plural furnace units 79
.Charging or discharging 80
..With charge pre-heating 81
..Top charging 82
...Through electrode 83
..Bottom pour 84
..Discharge by tilting 85
.For manipulation of the charge or melt (e.g., stirring) 86
..Mechanical 87
..Crust breaking device 88
.Electrode 89
..Self-baking (i.e., Soderberg) 90
..Non-consumable December 2000 373 - 2
CLASS 373 INDUSTRIAL ELECTRIC HEATING FURNACES
91
..Sectional 92
...With means to join sections 93
..Composite (e.g., water cooled body with carbon tip) 94
.Electrode support 95
..Seal 96
..With electrode shield 97
..For Soderberg electrode (e.g., casing) 98
..Mast 99
...Crosshead 100
..Slipping holder 101
..With electrical contact or terminal 102
.Power supply system 103
..Cable or cable suspension arrangement 104
..With power regulation 105
...By changing arc length 106
....Using a hydraulic or pneumatic device 107
..With magnetically influenced arc 108
..D.C. power 109
RESISTANCE FURNACE DEVICE 110
.With internal atmosphere control (e.g., pressure, vacuum, etc.) 111
..Having tubular charge containing or supporting

element 112
..Vacuum 113
.For cooling 114
..Terminal 115
.Charging or discharging 116
.For manipulation of the charge or melt (e.g., stirring) 117
.With heating element detail 118
..Resistance crucible 119
..Wall contained 120
..Open circuit (e.g., charge internal resistance heating) 121
...Salt bath heating 122
...Including crucible or hearth structure details 123
...With preheating 124
....Including starting resistor 125
...Including terminal detail 126
....With axial bore 127
..Having resistance encasement means 128
..Mounting 129
...Base 130
...Side wall 131
....With resistor element compression 132
..Non-metallic resistor 133
...Rod-like 134
..Including resistor shape detail 135
.Control 136
..Temperature 137
.Lining 138
INDUCTION FURNACE DEVICE 139
.Zone melting 140
.With internal atmosphere control (e.g., pressure, vacuum, etc.) 141
..Vacuum 142
.For charging or discharging 143
..By tilting 144
.Having plural heating elements 145
.Having condition signaling means 146
.With means for manipulation of the charge or melt (e.g.,

stirring) 147
.Power supply system 148
..Regulating 149
.For furnace regulating 150
..Electrical 151
.Coreless 152
..Coil 153
...Support 154
...Cooling 155
..Lining 156
..Crucible 157
...Conducting (e.g., graphite) 158
..Cooling 159
.Core-type (i.e., channel) 160
..Coil 161
..Channel 162
...Lining 163
..Crucible or hearth 164
..Lining 165
..Cooling 166
MISCELLANEOUS FOREIGN ART COLLECTIONS FOR
CLASS-RELATED FOREIGN DOCUMENTS December 2000