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Class Information
Number: 373
Name: Industrial electric heating furnaces >
Description: GENERAL STATEMENT OF CLASS SUBJECT MATTER










Class Number Class Name No. of Patents
373/60

Arc furnace device

42
373/79

Charging or discharging

77
373/83

Bottom pour

19
373/84

Discharge by tilting

50
373/81

Top charging

63
373/82

Through electrode

34
373/80

With charge pre-heating

77
373/94

Electrode support

62
373/97

For soderberg electrode (e.g., casing)

22
373/98

Mast

9
373/99

Crosshead

13
373/95

Seal

34
373/100

Slipping holder

29
373/101

With electrical contact or terminal

36
373/96

With electrode shield

22
373/88

Electrode

64
373/93

Composite (e.g., water cooled body with carbon tip)

62
373/90

Non-consumable

17
373/91

Sectional

36
373/92

With means to join sections

59
373/89

Self-baking (i.e., soderberg)

42
373/85

For manipulation of the charge or melt (e.g., stirring)

45
373/87

Crust breaking device

6
373/86

Mechanical

17
373/71

Furnace body detail

64
373/72

Hearth or crucible

146
373/73

Roof

56
373/74

With cooling

69
373/75

Sidewall

40
373/76

With cooling

100
373/77

With internal atmosphere control (e.g., pressure, vacuum, etc.)

31
373/61

Indirect

6
373/65

Arc between electrode and crucible exterior

10
373/62

Arc between spaced electrodes

22
373/63

Charge fed into space

13
373/64

With arc deflection means

12
373/66

Combined with or convertible to direct arc furnace

10
373/67

Ingot remelting

19
373/69

With electrode holder or guide

17
373/68

With internal atmosphere control (e.g., pressure, vacuum, etc.)

6
373/70

With power regulation

24
373/78

Plural furnace units

49
373/102

Power supply system

69
373/103

Cable or cable suspension arrangement

22
373/108

D.c. power

128
373/107

With magnetically influenced arc

27
373/104

With power regulation

84
373/105

By changing arc length

66
373/106

Using a hydraulic or pneumatic device

13
373/10

Electron beam furnace device

35
373/15

Ingot remelting

9
373/11

Vaporizing furnace

30
373/13

Gun assembly

14
373/14

With deflection control

24
373/12

Power supply and control circuit

5
373/16

With plural beam devices

8
373/17

Zone melting

2
373/42

Electroslag remelting device

29
373/44

Body detail

8
373/45

Crucible

22
373/51

Electrode replacement

6
373/52

Electrode support

26
373/53

Plural electrodes

7
373/54

Electrode

12
373/55

With protective shield

5
373/43

Plural furnace units

5
373/47

Power supply system

16
373/48

Conductor arrangement

8
373/49

Control

13
373/50

By changing electrode position

20
373/46

Start-up

7
373/8

Environmental control

51
373/9

Arc furnace

97
373/27

Glass furnace device

71
373/28

Filament discharge (i.e., bushing)

35
373/29

Joule effect heating

26
373/33

Charging or discharging

43
373/34

Including batch pre-heating

19
373/35

Including discharge area heating

22
373/39

Electrical system

25
373/41

Electrode arrangement (e.g., array)

44
373/40

Regulation

37
373/36

Electrode assembly

49
373/38

Holder

15
373/37

Protection means

17
373/30

Furnace body detail

46
373/31

Multi-chamber

13
373/32

With heating between chambers

24
373/26

Glow discharge furnace device

7
373/138

Induction furnace device

55
373/159

Core-type (i.e., channel)

16
373/161

Channel

23
373/162

Lining

15
373/160

Coil

16
373/165

Cooling

11
373/163

Crucible or hearth

20
373/164

Lining

13
373/151

Coreless

46
373/152

Coil

36
373/154

Cooling

26
373/153

Support

28
373/158

Cooling

26
373/156

Crucible

86
373/157

Conducting (e.g., graphite)

34
373/155

Lining

45
373/142

For charging or discharging

67
373/143

By tilting

19
373/149

For furnace regulating

10
373/150

Electrical

18
373/145

Having condition signaling means

17
373/144

Having plural heating elements

23
373/147

Power supply system

18
373/148

Regulating

29
373/140

With internal atmosphere control (e.g., pressure, vacuum, etc.)

30
373/141

Vacuum

16
373/146

With means for manipulation of the charge or melt (e.g., stirring)

40
373/139

Zone melting

56
373/166

Miscellaneous

13
373/18

Plasma furnace device

114
373/22

Direct furnace (i.e., plasma flame impinges on the melt)

93
373/25

Control system

18
373/23

Expanded arc column

12
373/24

Sidewall mounted plasmatron

36
373/19

Indirect heating

12
373/20

Rotary furnace

29
373/21

Remelting furnace (i.e., ingot remelting)

12
373/1

Plural diverse heating means

18
373/2

Arc

43
373/4

With induction

7
373/3

With resistance

6
373/7

Induction

16
373/5

Resistance

16
373/6

With induction

5
373/109

Resistance furnace device

52
373/115

Charging or discharging

40
373/135

Control

31
373/136

Temperature

31
373/113

For cooling

28
373/114

Terminal

12
373/116

For manipulation of the charge or melt (e.g., stirring)

21
373/137

Lining

82
373/117

With heating element detail

58
373/127

Having resistance encasement means

40
373/134

Including resistor shape detail

66
373/128

Mounting

64
373/129

Base

9
373/130

Side wall

71
373/131

With resistor element compression

9
373/132

Non-metallic resistor

22
373/133

Rod-like

27
373/120

Open circuit (e.g., charge internal resistance heating)

48
373/122

Including crucible or hearth structure details

32
373/125

Including terminal detail

16
373/126

With axial bore

0
373/121

Salt bath heating

8
373/123

With preheating

5
373/124

Including starting resistor

2
373/118

Resistance crucible

42
373/119

Wall contained

40
373/110

With internal atmosphere control (e.g., pressure, vacuum, etc.)

52
373/111

Having tubular charge containing or supporting element

54
373/112

Vacuum

41
373/56

With condensating device

6
373/59

Including induction furnace detail

9
373/57

Including resistance furnace detail

7
373/58

With open circuit (i.e., charge internal resistance heating)

3
 
 
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