US Patent Class 373
INDUSTRIAL ELECTRIC HEATING FURNACES



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Current as of: June, 1999
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  DF  CLASS NOTES
1  DF  PLURAL DIVERSE HEATING MEANS
2  DF  .~ Arc
3  DF  .~.~ With resistance
4  DF  .~.~ With induction
5  DF  .~ Resistance
6  DF  .~.~ With induction
7  DF  .~ Induction
8  DF  ENVIRONMENTAL CONTROL
9  DF  .~ Arc furnace
10  DF  ELECTRON BEAM FURNACE DEVICE
11  DF  .~ Vaporizing furnace
12  DF  .~.~ Power supply and control circuit
13  DF  .~.~ Gun assembly
14  DF  .~.~.~ With deflection control
15  DF  .~ Ingot remelting
16  DF  .~ With plural beam devices
17  DF  .~ Zone melting
18  DF  PLASMA FURNACE DEVICE
19  DF  .~ Indirect heating
20  DF  .~.~ Rotary furnace
21  DF  .~ Remelting furnace (i.e., ingot remelting)
22  DF  .~ Direct furnace (i.e., plasma flame impinges on the melt)
23  DF  .~.~ Expanded arc column
24  DF  .~.~ Sidewall mounted plasmatron
25  DF  .~.~ Control system
26  DF  GLOW DISCHARGE FURNACE DEVICE
27  DF  GLASS FURNACE DEVICE
28  DF  .~ Filament discharge (i.e., bushing)
29  DF  .~ Joule effect heating
30  DF  .~.~ Furnace body detail
31  DF  .~.~.~ Multi-chamber
32  DF  .~.~.~.~ With heating between chambers
33  DF  .~.~ Charging or discharging
34  DF  .~.~.~ Including batch pre-heating
35  DF  .~.~.~ Including discharge area heating
36  DF  .~.~ Electrode assembly
37  DF  .~.~.~ Protection means
38  DF  .~.~.~ Holder
39  DF  .~.~ Electrical system
40  DF  .~.~.~ Regulation
41  DF  .~.~.~ Electrode arrangement (e.g., array)
42  DF  ELECTROSLAG REMELTING DEVICE
43  DF  .~ Plural furnace units
44  DF  .~ Body detail
45  DF  .~.~ Crucible
46  DF  .~ Start-up
47  DF  .~ Power supply system
48  DF  .~.~ Conductor arrangement
49  DF  .~.~ Control
50  DF  .~.~.~ By changing electrode position
51  DF  .~ Electrode replacement
52  DF  .~ Electrode support
53  DF  .~.~ Plural electrodes
54  DF  .~ Electrode
55  DF  .~.~ With protective shield
56  DF  WITH CONDENSATING DEVICE
57  DF  .~ Including resistance furnace detail
58  DF  .~.~ With open circuit (i.e., charge internal resistance heating)
59  DF  .~ Including induction furnace detail
60  DF  ARC FURNACE DEVICE
61  DF  .~ Indirect
62  DF  .~.~ Arc between spaced electrodes
63  DF  .~.~.~ Charge fed into space
64  DF  .~.~.~ With arc deflection means
65  DF  .~.~ Arc between electrode and crucible exterior
66  DF  .~.~ Combined with or convertible to direct arc furnace
67  DF  .~ Ingot remelting
68  DF  .~.~ With internal atmosphere control (e.g., pressure, vacuum, etc.)
69  DF  .~.~ With electrode holder or guide
70  DF  .~.~ With power regulation
71  DF  .~ Furnace body detail
72  DF  .~.~ Hearth or crucible
73  DF  .~.~ Roof
74  DF  .~.~.~ With cooling
75  DF  .~.~ Sidewall
76  DF  .~.~.~ With cooling
77  DF  .~.~ With internal atmosphere control (e.g., pressure, vacuum, etc.)
78  DF  .~ Plural furnace units
79  DF  .~ Charging or discharging
80  DF  .~.~ With charge pre-heating
81  DF  .~.~ Top charging
82  DF  .~.~.~ Through electrode
83  DF  .~.~ Bottom pour
84  DF  .~.~ Discharge by tilting
85  DF  .~ For manipulation of the charge or melt (e.g., stirring)
86  DF  .~.~ Mechanical
87  DF  .~.~ Crust breaking device
88  DF  .~ Electrode
89  DF  .~.~ Self-baking (i.e., Soderberg)
90  DF  .~.~ Non-consumable
91  DF  .~.~ Sectional
92  DF  .~.~.~ With means to join sections
93  DF  .~.~ Composite (e.g., water cooled body with carbon tip)
94  DF  .~ Electrode support
95  DF  .~.~ Seal
96  DF  .~.~ With electrode shield
97  DF  .~.~ For Soderberg electrode (e.g., casing)
98  DF  .~.~ Mast
99  DF  .~.~.~ Crosshead
100  DF  .~.~ Slipping holder
101  DF  .~.~ With electrical contact or terminal
102  DF  .~ Power supply system
103  DF  .~.~ Cable or cable suspension arrangement
104  DF  .~.~ With power regulation
105  DF  .~.~.~ By changing arc length
106  DF  .~.~.~.~ Using a hydraulic or pneumatic device
107  DF  .~.~ With magnetically influenced arc
108  DF  .~.~ D.C. power
109  DF  RESISTANCE FURNACE DEVICE
110  DF  .~ With internal atmosphere control (e.g., pressure, vacuum, etc.)
111  DF  .~.~ Having tubular charge containing or supporting element
112  DF  .~.~ Vacuum
113  DF  .~ For cooling
114  DF  .~.~ Terminal
115  DF  .~ Charging or discharging
116  DF  .~ For manipulation of the charge or melt (e.g., stirring)
117  DF  .~ With heating element detail
118  DF  .~.~ Resistance crucible
119  DF  .~.~ Wall contained
120  DF  .~.~ Open circuit (e.g., charge internal resistance heating)
121  DF  .~.~.~ Salt bath heating
122  DF  .~.~.~ Including crucible or hearth structure details
123  DF  .~.~.~ With preheating
124  DF  .~.~.~.~ Including starting resistor
125  DF  .~.~.~ Including terminal detail
126  DF  .~.~.~.~ With axial bore
127  DF  .~.~ Having resistance encasement means
128  DF  .~.~ Mounting
129  DF  .~.~.~ Base
130  DF  .~.~.~ Side wall
131  DF  .~.~.~.~ With resistor element compression
132  DF  .~.~ Non-metallic resistor
133  DF  .~.~.~ Rod-like
134  DF  .~.~ Including resistor shape detail
135  DF  .~ Control
136  DF  .~.~ Temperature
137  DF  .~ Lining
138  DF  INDUCTION FURNACE DEVICE
139  DF  .~ Zone melting
140  DF  .~ With internal atmosphere control (e.g., pressure, vacuum, etc.)
141  DF  .~.~ Vacuum
142  DF  .~ For charging or discharging
143  DF  .~.~ By tilting
144  DF  .~ Having plural heating elements
145  DF  .~ Having condition signaling means
146  DF  .~ With means for manipulation of the charge or melt (e.g., stirring)
147  DF  .~ Power supply system
148  DF  .~.~ Regulating
149  DF  .~ For furnace regulating
150  DF  .~.~ Electrical
151  DF  .~ Coreless
152  DF  .~.~ Coil
153  DF  .~.~.~ Support
154  DF  .~.~.~ Cooling
155  DF  .~.~ Lining
156  DF  .~.~ Crucible
157  DF  .~.~.~ Conducting (e.g., graphite)
158  DF  .~.~ Cooling
159  DF  .~ Core-type (i.e., channel)
160  DF  .~.~ Coil
161  DF  .~.~ Channel
162  DF  .~.~.~ Lining
163  DF  .~.~ Crucible or hearth
164  DF  .~.~ Lining
165  DF  .~.~ Cooling
166  DF  MISCELLANEOUS