Class   373	INDUSTRIAL ELECTRIC HEATING FURNACES
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PLURAL DIVERSE HEATING MEANS

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. (1 indent ) Arc

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.. (2 indent ) With resistance

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.. (2 indent ) With induction

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. (1 indent ) Resistance

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.. (2 indent ) With induction

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. (1 indent ) Induction

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ENVIRONMENTAL CONTROL

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. (1 indent ) Arc furnace

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ELECTRON BEAM FURNACE DEVICE

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. (1 indent ) Vaporizing furnace

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.. (2 indent ) Power supply and control circuit

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.. (2 indent ) Gun assembly

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... (3 indent ) With deflection control

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. (1 indent ) Ingot remelting

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. (1 indent ) With plural beam devices

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. (1 indent ) Zone melting

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PLASMA FURNACE DEVICE

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. (1 indent ) Indirect heating

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.. (2 indent ) Rotary furnace

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. (1 indent ) Remelting furnace (i.e., ingot remelting)

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

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.. (2 indent ) Expanded arc column

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.. (2 indent ) Sidewall mounted plasmatron

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.. (2 indent ) Control system

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GLOW DISCHARGE FURNACE DEVICE

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GLASS FURNACE DEVICE

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. (1 indent ) Filament discharge (i.e., bushing)

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. (1 indent ) Joule effect heating

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.. (2 indent ) Furnace body detail

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... (3 indent ) Multi-chamber

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.... (4 indent ) With heating between chambers

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.. (2 indent ) Charging or discharging

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... (3 indent ) Including batch pre-heating

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... (3 indent ) Including discharge area heating

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.. (2 indent ) Electrode assembly

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... (3 indent ) Protection means

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... (3 indent ) Holder

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.. (2 indent ) Electrical system

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... (3 indent ) Regulation

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... (3 indent ) Electrode arrangement (e.g., array)

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ELECTROSLAG REMELTING DEVICE

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. (1 indent ) Plural furnace units

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. (1 indent ) Body detail

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.. (2 indent ) Crucible

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. (1 indent ) Start-up

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. (1 indent ) Power supply system

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.. (2 indent ) Conductor arrangement

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.. (2 indent ) Control

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... (3 indent ) By changing electrode position

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. (1 indent ) Electrode replacement

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. (1 indent ) Electrode support

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.. (2 indent ) Plural electrodes

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. (1 indent ) Electrode

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.. (2 indent ) With protective shield

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WITH CONDENSATING DEVICE

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. (1 indent ) Including resistance furnace detail

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

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. (1 indent ) Including induction furnace detail

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ARC FURNACE DEVICE

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. (1 indent ) Indirect

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.. (2 indent ) Arc between spaced electrodes

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... (3 indent ) Charge fed into space

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... (3 indent ) With arc deflection means

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.. (2 indent ) Arc between electrode and crucible exterior

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.. (2 indent ) Combined with or convertible to direct arc furnace

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. (1 indent ) Ingot remelting

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

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.. (2 indent ) With electrode holder or guide

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.. (2 indent ) With power regulation

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. (1 indent ) Furnace body detail

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.. (2 indent ) Hearth or crucible

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.. (2 indent ) Roof

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... (3 indent ) With cooling

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.. (2 indent ) Sidewall

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... (3 indent ) With cooling

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

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. (1 indent ) Plural furnace units

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. (1 indent ) Charging or discharging

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.. (2 indent ) With charge pre-heating

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.. (2 indent ) Top charging

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... (3 indent ) Through electrode

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.. (2 indent ) Bottom pour

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.. (2 indent ) Discharge by tilting

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

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.. (2 indent ) Mechanical

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.. (2 indent ) Crust breaking device

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. (1 indent ) Electrode

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.. (2 indent ) Self-baking (i.e., Soderberg)

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.. (2 indent ) Non-consumable

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.. (2 indent ) Sectional

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... (3 indent ) With means to join sections

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

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. (1 indent ) Electrode support

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.. (2 indent ) Seal

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.. (2 indent ) With electrode shield

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.. (2 indent ) For Soderberg electrode (e.g., casing)

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.. (2 indent ) Mast

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... (3 indent ) Crosshead

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.. (2 indent ) Slipping holder

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.. (2 indent ) With electrical contact or terminal

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. (1 indent ) Power supply system

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.. (2 indent ) Cable or cable suspension arrangement

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.. (2 indent ) With power regulation

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... (3 indent ) By changing arc length

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.... (4 indent ) Using a hydraulic or pneumatic device

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.. (2 indent ) With magnetically influenced arc

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.. (2 indent ) D.C. power

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RESISTANCE FURNACE DEVICE

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

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.. (2 indent ) Having tubular charge containing or supporting element

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.. (2 indent ) Vacuum

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. (1 indent ) For cooling

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.. (2 indent ) Terminal

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. (1 indent ) Charging or discharging

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

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. (1 indent ) With heating element detail

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.. (2 indent ) Resistance crucible

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.. (2 indent ) Wall contained

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

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... (3 indent ) Salt bath heating

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... (3 indent ) Including crucible or hearth structure details

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... (3 indent ) With preheating

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.... (4 indent ) Including starting resistor

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... (3 indent ) Including terminal detail

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.... (4 indent ) With axial bore

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.. (2 indent ) Having resistance encasement means

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.. (2 indent ) Mounting

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... (3 indent ) Base

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... (3 indent ) Side wall

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.... (4 indent ) With resistor element compression

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.. (2 indent ) Non-metallic resistor

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... (3 indent ) Rod-like

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.. (2 indent ) Including resistor shape detail

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. (1 indent ) Control

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.. (2 indent ) Temperature

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. (1 indent ) Lining

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INDUCTION FURNACE DEVICE

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. (1 indent ) Zone melting

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

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.. (2 indent ) Vacuum

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. (1 indent ) For charging or discharging

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.. (2 indent ) By tilting

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. (1 indent ) Having plural heating elements

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. (1 indent ) Having condition signaling means

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

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. (1 indent ) Power supply system

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.. (2 indent ) Regulating

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. (1 indent ) For furnace regulating

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.. (2 indent ) Electrical

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. (1 indent ) Coreless

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.. (2 indent ) Coil

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... (3 indent ) Support

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... (3 indent ) Cooling

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.. (2 indent ) Lining

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.. (2 indent ) Crucible

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... (3 indent ) Conducting (e.g., graphite)

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.. (2 indent ) Cooling

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. (1 indent ) Core-type (i.e., channel)

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.. (2 indent ) Coil

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.. (2 indent ) Channel

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... (3 indent ) Lining

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.. (2 indent ) Crucible or hearth

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.. (2 indent ) Lining

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.. (2 indent ) Cooling

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