US Pat. No. 9,445,460

VARIABLE WIDTH TRANSVERSE FLUX ELECTRIC INDUCTION COILS

INDUCTOTHERM CORP., Ranc...

1. A transverse flux electric induction coil comprising:
a fixed planar coil section formed from at least a pair of fixed transverse sections co-planarly spaced apart from each other,
the pair of fixed transverse sections joined together near each adjacent opposing end by a fixed bridge section to form at
least one turn coil, the fixed planar coil section connected to an alternating current power source to create an alternating
magnetic flux field around the fixed planar coil section; and

at least one box-shaped moveable coil section electrically isolated from, and slidably connected by mechanical connection
to, at least one end of the fixed planar coil section while being closely electromagnetically coupled with the alternating
magnetic flux field at least around the fixed bridge section, the at least one box-shaped moveable coil section comprising
a three sided, open ended box having opposing side sections joined by a bridge section and a slat section to form a closed
electrical path around the opposing side sections.

US Pat. No. 9,167,632

SCAN INDUCTION HEATING

INDUCTOTHERM CORP., Ranc...

1. An apparatus for induction heating of a workpiece having a length, the apparatus comprising:
a means for holding the workpiece stationary;
a power source having an ac output with an ac output frequency, the ac output having a duty cycle with pulse width modulation
control;

at least one inductor connected to the ac output to generate an ac magnetic field, the at least one inductor at least partially
surrounding the length of the workpiece;

a means for moving the at least one inductor to one or more inductor positions for a period of time at each of the one or
more inductor positions along the length of the workpiece to magnetically couple one or more selected parts of the workpiece
with the ac magnetic field;

a means for selectively adjusting the ac output frequency to a heat treatment frequency responsive to each one of the one
or more inductor positions of the at least one inductor along the length of the workpiece; and

a means for selectively adjusting the power of the ac output by changing the duty cycle of the ac output to a heat treatment
duty cycle responsive to the heat treatment frequency.

US Pat. No. 9,400,137

ELECTRIC INDUCTION FURNACE WITH LINING WEAR DETECTION SYSTEM

INDUCTOTHERM CORP., Ranc...

1. A method of fabricating an electric induction furnace with a lining wear detection system, the method comprising the steps
of:
locating a wound induction coil above a foundation;
installing a refractory around the wound induction coil to form a refractory embedded induction coil;
positioning a flowable refractory mold within the refractory embedded induction coil to provide a cast flowable refractory
volume between an outer flowable refractory mold wall of the flowable refractory mold and an inner refractory embedded induction
coil wall of the refractory embedded induction coil;

fitting at least one electrically conductive mesh around the outer flowable refractory mold wall of the flowable refractory
mold;

pouring a cast flowable refractory into the cast flowable refractory volume to embed the at least one electrically conductive
mesh in the cast flowable refractory to form an embedded mesh castable refractory in the cast flowable refractory volume;

removing the flowable refractory mold to form an interior cast flowable refractory furnace volume;
positioning a replaceable lining mold within the interior cast flowable refractory furnace volume to form a replaceable lining
wall volume between an outer replaceable lining mold wall of the replaceable lining mold and an inner embedded mesh castable
refractory wall of the embedded mesh castable refractory, and a replaceable lining bottom volume above the foundation;

feeding a replaceable lining refractory into the replaceable lining wall volume and the replaceable lining bottom volume;
and

removing the replaceable lining mold to form an interior volume of the electric induction furnace.

US Pat. No. 9,585,201

ELECTRIC INDUCTION HEATING OF RAILS

INDUCTOTHERM CORP., Ranc...

1. A transverse flux electric induction rail heater for inductively heating a longitudinal section of a rail passing through
the transverse flux electric induction rail heater, the rail having a head joined to a foot by a web, the rail having a first
side and a second side oriented on opposing cross sectional sides of the rail, the transverse flux electric induction rail
heater comprising:
a right rail side coil disposed adjacent to the first side of the rail, the right rail side coil comprising:
a right upper longitudinal coil section disposed parallel to the longitudinal section of the rail and located adjacently above
the first side of the head;

a right lower longitudinal coil section disposed parallel to the longitudinal section of the rail and located adjacently below
the first side of the foot;

a right front riser coil section disposed adjacently to the first side of the rail and oriented perpendicular to the longitudinal
section of the rail, the right front riser coil section connecting a front adjacent ends of the right upper and lower longitudinal
coil sections; and

a right rear riser coil section disposed adjacently to the first side of the rail and oriented perpendicular to the longitudinal
section of the rail, the right rear riser coil section connecting a rear adjacent ends of the right upper and lower longitudinal
coil sections;

whereby the right rail side coil forms at least a first one turn coil along the first side of the rail;
and
a left rail side coil disposed adjacent to the second side of the rail, the left rail side coil comprising:
a left upper longitudinal coil section disposed parallel to the longitudinal section of the rail and located adjacently to
the right upper longitudinal coil section above the second side of the head;

a left lower longitudinal coil section disposed parallel to the longitudinal section of the rail and located adjacently to
the right lower longitudinal coil section below the second side of the foot;

a left front riser coil section disposed adjacently to the second side of the rail and oriented perpendicular to the longitudinal
section of the rail, the left front riser coil section connecting a front adjacent ends of the left upper and lower longitudinal
coil section ends; and

a left rear riser coil section disposed adjacently to the second side of the rail and oriented perpendicular to the longitudinal
section of the rail, the left rear riser coil section connecting a rear adjacent ends of the left upper and lower longitudinal
coil sections;

whereby the left rail side coil forms at least a second one turn coil along the second side of the rail.

US Pat. No. 9,375,785

MOLTEN METAL HOLDING AND POURING BOX WITH DUAL POURING NOZZLES

INDUCTOTHERM CORP., Ranc...

1. A molten metal holding and pouring box for holding a volume of a molten metal comprising:
an upper rectangular-shaped section for receiving the volume of the molten metal through a closeable opening in the upper
rectangular-shaped section of the molten metal holding and pouring box;

a lower inverted pyramidal-shaped section comprising a downward sloped region extending from the upper rectangular-shaped
section to a bottom region; and

a unitary dual nozzle assembly located in a bottom region of the lower inverted pyramidal-shaped section to pour 75 percent
of the volume of the molten metal received through the closeable opening with a corresponding drop of not more than 50percent
in a pressure head and a corresponding drop of not more than 30 percent in the flow rate.

US Pat. No. 9,226,344

MELTING AND MIXING OF MATERIALS IN A CRUCIBLE BY ELECTRIC INDUCTION HEEL PROCESS

INDUCTOTHERM CORP., Ranc...

1. A method of melting a crucible batch of a transition material by gradually adding a solid or semi-solid charge of the transition
material to a molten heel of the transition material in a crucible having a plurality of induction coils surrounding the exterior
of the crucible, each one of the plurality of induction coils exclusively surrounding one of a plurality of partial interior
volumes forming a total interior volume of the crucible, the lowest one of the plurality of partial interior volumes comprising
a bottom interior volume and the highest one of the plurality of partial interior volumes comprising a top interior volume
of the crucible, the method comprising the steps of:
loading the molten heel of the transition material into at least a portion of the bottom interior volume;
connecting a bottom volume output of a melting power source to the one of the plurality of induction coils surrounding the
bottom interior volume, the bottom volume output of the melting power source operating at a melting frequency and a melting
power level to keep the molten heel of the transition material at least at the minimum melting temperature of the transition
material;

sequentially adding the solid or semi-solid charge of the transition material into at least a part of each of the next highest
one of the plurality of partial interior volumes up to the top interior volume and connecting a discrete next highest volume
output of the melting power source to the one of the plurality of induction coils surrounding the next highest one of the
plurality of partial interior volumes to which the solid or semi-solid charge of the transition material is added and a top
volume output of the melting power source to the one of the plurality of induction coils surrounding the top interior volume
until the crucible is filled to the total interior volume of the crucible with the crucible batch of the transition material,
the discrete next highest volume outputs of the melting power source and the top volume output of the melting power source
operating at the melting frequency and the melting power level; and

simultaneously disconnecting the top volume output of the melting power source, the discrete next highest volume outputs of
the melting power source and the bottom output volume of the melting power source from the plurality of induction coils and
connecting a discrete one of a plurality of stir outputs of at least one stirring power source to each one of the plurality
of induction coils, the plurality of stir outputs of the at least one stirring power source operating at a stirring frequency
and a stirring power level, the stirring frequency being lower than the melting frequency, and the stirring power level being
lower than the melting power level, the output stir voltage of each of the plurality of stir outputs of the at least one stirring
power source phase shifted from each other to induce an unidirectional electromagnetic stirring of the crucible batch of the
transition material in the crucible.

US Pat. No. 9,567,874

ELECTRIC INDUCTION FLUID HEATERS FOR FLUIDS UTILIZED IN TURBINE-DRIVEN ELECTRIC GENERATOR SYSTEMS

INDUCTOTHERM CORP., Ranc...

1. A fluid latent heat absorption electric induction heater for raising the temperature of a fluid supplied to a fluid-driven
turbine in a turbine-driven electric power generation system, the fluid latent heat absorption electric induction heater comprising:
a containment vessel;
at least one susceptor disposed within the containment vessel, the at least one susceptor having an interior fluid passage;
at least one inductor disposed within the interior fluid passage;
an inlet opening in the containment vessel for an inlet supply of the fluid in a low temperature liquid state to the interior
fluid passage; and

an outlet opening in the containment vessel for an outlet supply of the fluid in a high temperature liquid state for fluid
change state processing to drive the fluid-driven turbine.

US Pat. No. 9,506,820

DETECTION OF MELT ADJACENT TO THE EXTERIOR OF THE BUSHING IN AN INDUCTION CHANNEL FURNACE

INDUCTOTHERM CORP., Ranc...

1. An apparatus for detection of a melt adjacent to an exterior surface of a bushing in an induction channel furnace, the
apparatus comprising:
an arrangement of spaced apart and interconnected electrical conductors disposed at least partially around the exterior surface
of the bushing, the arrangement of spaced apart and interconnected electrical conductors at least partially surrounded by
a refractory separating the arrangement of spaced apart and interconnected electrical conductors from a molten metal channel
in the induction channel furnace; and

an electrically grounded voltage source electrically connected to the arrangement of spaced apart and interconnected electrical
conductors.

US Pat. No. 9,073,145

ELECTRIC INDUCTION IMPEDER

Inductotherm Corp., Ranc...

1. An impeder for controlling a magnetic field path in a workpiece in an electric induction welding process, the impeder comprising:
a magnetic material comprising a plurality of magnetically conductive, high Curie temperature solid wires assembled in a bundle,
each of the plurality of wires electrically isolated from each other, the magnetic material having a longitudinal exterior
boundary and a first end exterior boundary of a first magnetic material end and a second end exterior boundary of a second
magnetic material end, the first magnetic material end opposing the second magnetic material end; and

a high temperature enclosure having a longitudinal interior boundary and a first enclosure end interior boundary of a first
enclosure end and a second enclosure end interior boundary of a second enclosure end, the first enclosure end interior boundary
opposing the second enclosure end interior boundary, the first enclosure end interior boundary facing the first end exterior
boundary of the magnetic material, and the second enclosure end interior boundary facing the second end exterior boundary
of the magnetic material, the longitudinal exterior boundary and the first and second end exterior boundaries of the magnetic
material respectively spaced apart from the longitudinal interior boundary and the first and second enclosure end interior
boundaries of the high temperature enclosure to form a continuous internal coolant flow passage in the impeder, the high temperature
enclosure having at least one inlet port in the first enclosure end for injecting a cooling medium into the continuous internal
coolant flow passage and at least one outlet port in the second enclosure end for discharging the cooling medium from the
continuous internal coolant flow passage, the at least one inlet port axially aligned with the at least one outlet port.

US Pat. No. 9,056,776

REMOTE COOL DOWN OF A PURIFIED DIRECTIONALLY SOLIDIFIED MATERIAL FROM AN OPEN BOTTOM COLD CRUCIBLE INDUCTION FURNACE

INDUCTOTHERM CORP., Ranc...

1. A solidification process for a multi-crystalline material from a melt produced in an open bottom induction cold crucible,
the solidification process comprising the steps of:
supplying a feedstock at the top of the open bottom induction cold crucible;
forming the melt in the open bottom induction cold crucible by a magnetic flux coupling with the feedstock and melt combination
when an alternating current flows through one or more induction coils surrounding the exterior of the open bottom induction
cold crucible;

forming from the melt a continuous supply of a hot solidified mass of a purified multi-crystalline material at the open bottom
of the open bottom induction cold crucible;

gravity feeding the hot solidified mass of the purified multi-crystalline material into a mold having a moveable inner bottom;
controlling the rate of the gravity feeding of the hot solidified mass of the purified multi-crystalline material into the
mold by a powered drive in communication with the moveable inner bottom of the mold;

severing the hot solidified mass of the purified multi-crystalline material from the continuous supply of the hot solidified
mass of the purified multi-crystalline material at the open bottom of the open bottom induction cold crucible; and

moving the mold for remote directional solidification of the hot solidified mass of the purified multi-crystalline material
in the mold without application of an external heating or cooling source.

US Pat. No. 9,357,588

MELTING AND MIXING OF MATERIALS IN A CRUCIBLE BY ELECTRIC INDUCTION HEEL PROCESS

INDUCTOTHERM CORP., Ranc...

1. A method of melting a crucible batch of a transition material by gradually adding a solid or semi-solid charge of the transition
material to a molten heel of the transition material in a crucible having a plurality of induction coils surrounding the exterior
of the crucible, each one of the plurality of induction coils exclusively surrounding one of a plurality of partial interior
volumes of the crucible, a lowest one of the plurality of partial interior volumes comprising a bottom interior volume and
a highest one of the plurality of partial interior volumes comprising a top interior volume of the crucible, each one of the
plurality of induction coils connected to the output of a separate alternating current power source, the method comprising
the steps of:
loading the molten heel of the transition material into at least a bottom portion of the bottom interior volume and adjusting
the output of the separate alternating current power source connected to the one of the plurality of induction coils surrounding
the bottom interior volume to a melting frequency and a melting power level to keep the molten heel of the transition material
at least at a minimum melting temperature of the transition material;

simultaneously adding the solid or semi-solid charge of the transition material into at least a top portion of the top interior
volume of the crucible subsequent to sequentially adding the solid or semi-solid charge into the bottom interior volume to
form the crucible batch of a molten transition material and adjusting the output of the separate alternating current power
source connected to the one of the plurality of induction coils surrounding the top interior volume to the melting frequency
and the melting power level while synchronizing the phase of an output voltage of the separate alternating current power source
connected to the one of the plurality of induction coils surrounding the top interior volume with the phase of the output
voltage of the separate alternating current source connected to the one of the plurality of induction coils surrounding the
bottom interior volume; and

simultaneously reducing the output of each one of the separate alternating current power sources to a stirring frequency and
a stirring power level while phase shifting the output voltages of each of the separate alternating current power sources
to induce a unidirectional electromagnetic stirring of the crucible batch of the molten transition material in the crucible,
the stirring frequency being lower than the melting frequency, and the stirring power level being lower than the melting power
level.

US Pat. No. 9,930,730

VARIABLE WIDTH TRANSVERSE FLUX ELECTRIC INDUCTION COILS

INDUCTOTHERM CORP., Ranc...

1. A transverse flux electric induction coil comprising:a fixed planar coil section formed from at least a pair of fixed transverse sections co-planarly spaced apart from each other to form a fixed coil section plane, the pair of fixed transverse sections joined together near each adjacent opposing end regions of the pair of fixed transverse sections by a joining fixed bridge section to form at least a one turn coil, the fixed planar coil section connected to an alternating current power source to create an alternating magnetic flux field around the fixed planar coil section; and
at least one box-shaped moveable coil section electrically isolated from, and slidably connected by mechanical connection to, at least one end of the fixed planar coil section while being closely electromagnetically coupled with the alternating magnetic flux field at least around the joining fixed bridge section, the at least one box-shaped moveable coil section comprising a planarly-oriented coil section slidably connected by mechanical connection over each adjacent opposing end regions of the pair of fixed transverse sections and the joining fixed bridge section.

US Pat. No. 9,400,136

ELECTRIC INDUCTION GAS-SEALED TUNNEL FURNACE

INDUCTOTHERM CORP., Ranc...

1. An electric induction gas-sealed tunnel furnace comprising:
a furnace enclosure forming a closed tunnel region along a longitudinal length of the furnace enclosure through which a workpiece
passes through for induced heating, the closed tunnel region of the furnace enclosure having a workpiece entry end and a workpiece
exit end;

a furnace enclosure entry end flange located at the workpiece entry end and a furnace enclosure exit end flange located at
the workpiece exit end;

an induction coil disposed around the longitudinal length of the closed tunnel region of the furnace enclosure;an improvement comprising:
a barrier material forming a gas-tight barrier chamber around an exterior of the longitudinal length of the furnace enclosure,
the barrier material having a sealed entry end interface with the furnace enclosure entry end flange and a sealed exit end
interface with the furnace enclosure exit end flange, the sealed entry end interface with the furnace enclosure entry end
flange being formed by extending a first furnace enclosure end between a first barrier material end and the furnace enclosure
entry end flange, the first furnace enclosure end between the first barrier material end and the furnace enclosure entry end
flange forming a furnace enclosure-entry end flange sealed interface; and the sealed exit end interface with the furnace enclosure
exit end flange being formed by extending a second furnace enclosure end between a second barrier material end and the furnace
enclosure exit end flange, the second furnace enclosure end between the second barrier material end and the furnace enclosure
exit end flange forming a furnace enclosure-exit end flange sealed interface.

US Pat. No. 9,370,049

ELECTRIC INDUCTION HEATING, MELTING AND STIRRING OF MATERIALS NON-ELECTRICALLY CONDUCTIVE IN THE SOLID STATE

INDUCTOTHERM CORP., Ranc...

1. A method of heating and melting a transition material, the method comprising the steps of:
depositing the transition material in a non-electrically conductive state in a susceptor vessel having a lower section surrounded
by at least one active induction coil connected to an output of a variable frequency power supply, and an upper section above
the lower section surrounded by at least one secondary induction coil connected to at least one resonance capacitor to form
a passive coil circuit;

supplying power from the output of the variable frequency power supply to the at least one active induction coil at a start
frequency so that a standard depth of penetration is not substantially greater than a wall thickness of the susceptor vessel
to electromagnetically heat the susceptor vessel and transition the transition material in the susceptor vessel to an electrically
conductive state by conduction heating supplied from the susceptor vessel; and

reducing the frequency of the output of the variable frequency power supply from the start frequency to an intermediate frequency
responsive to the transition of the transition material in the susceptor vessel from the non-electrically conductive state
to the electrically conductive state.

US Pat. No. 9,530,750

METHOD OF CLAMPING A SEMICONDUCTOR ASSEMBLY

INDUCTOTHERM CORP., Ranc...

1. A method of clamping a semiconductor assembly, the method comprising the steps of:
attaching a first end retaining assembly to a first end of a first tie rod, the first end retaining assembly comprising a
first end retaining element and at least one spring or pre-load element;

passing the first tie rod through an opening near a first end of a first jaw to seat the at least one spring or pre-load element
against an outer surface of the first jaw;

compressing the at least one spring or pre-load element of the first end retaining assembly of the first tie rod by externally
applying a first compression force between the first end of the first tie rod and an inner surface of the first jaw equal
to one half of the first compression force to be applied across the semiconductor assembly;

securing a first assembly comprising a large diameter washer interposed between two washers having diameters smaller than
the large diameter washer around the first tie rod against the inner surface of the first jaw with a fastener;

removing the externally applied first compression force;
attaching a first end retaining assembly to a first end of a second tie rod, the first end retaining assembly comprising a
first end retaining element and at least one spring or pre-load element;

passing the second tie rod through an opening near a second end of the first jaw to seat the at least one spring or pre-loaded
element against the outer surface of the first jaw;

compressing the at least one spring or pre-load element of the first end retaining assembly of the second tie rod by externally
applying a second compression force between the first end of the second tie rod and the inner surface of the first jaw equal
to one half of the second compression force to be applied across the semiconductor assembly;

securing a second assembly comprising a large diameter washer interposed between two washers having diameters smaller than
the large diameter washer around the second tie rod against the inner surface of the first jaw with a fastener;

removing the externally applied second compression force;
positioning a first opposing semiconductor assembly side surface adjacent to a surface of a first pressure distribution element
disposed between the inner surface of the first jaw and the semiconductor assembly;

positioning a first opposing surface of a second pressure distribution element adjacent to a second opposing semiconductor
assembly side surface;

positioning a second opposing surface of the second pressure distribution element adjacent to the inner surface of a second
jaw with the second ends of the first and second tie rods passing through openings near the opposing ends of the second jaw;

attaching a second end retaining assembly to each of the second ends of the first and second tie rods, each second end retaining
assembly comprising a second end retaining element and at least one spring or pre-load element; and

compressing the at least one spring or pre-load element around the second ends of the first and second tie rods until the
large diameter washer on each one of the first and second tie rods can be turned by hand.

US Pat. No. 9,693,399

DETECTION OF MELT ADJACENT TO THE EXTERIOR OF THE BUSHING IN AN INDUCTION CHANNEL FURNACE

INDUCTOTHERM CORP., Ranc...

1. A method of detecting the presence of a molten metal adjacent to the exterior surface of a bushing in an induction channel
furnace, the method comprising the step of forming an electrical circuit from a voltage source electrically connected to an
arrangement of spaced apart and interconnected electrical conductors disposed at least partially around the exterior surface
of the bushing, the voltage source connected to an electric ground potential, the arrangement of spaced apart and interconnected
electrical conductors separated from a molten metal channel in the induction channel furnace by a refractory, the molten metal
channel containing the molten metal at the electric ground potential, and the molten metal adjacent to the exterior surface
of the bushing flowing from a breach in the refractory from the molten metal channel.

US Pat. No. 9,636,744

METHOD OF POURING MOLTEN METAL FROM A MOLTEN METAL HOLDING AND POURING BOX WITH DUAL POURING NOZZLES

INDUCTOTHERM CORP., Ranc...

1. A method of pouring a molten metal from a volume of the molten metal in a molten metal holding and pouring box into one
or more pair of molds, the molten metal holding and pouring box having an upper rectangular-shaped section and a lower pyramidal-shaped
section comprising a downward sloped region extending from the upper rectangular-shaped section to a bottom region, the molten
metal holding and pouring box having a unitary dual nozzle assembly located in the bottom of the lower pyramidal-shaped section,
the unitary dual nozzle assembly having a pair of nozzles, the method comprising:
pouring the volume of the molten metal into the molten metal holding and pouring box through a closeable opening in the upper
rectangular-shaped section;

transporting one of the one or more pair of molds into a molten metal receiving relationship with the molten metal holding
and pouring box;

holding the unitary dual nozzle assembly at the same temperature as the volume of the molten metal in the molten metal holding
and pouring box by constant contact of the unitary dual nozzle assembly with the molten metal; and

pouring the molten metal from the molten metal holding and pouring box through each of the pair of nozzles in the unitary
dual nozzle assembly so that 75 percent of the volume of the molten metal poured into the molten metal holding and pouring
box is poured into the one of the one or more pair of molds with no more than a 30 percent decrease in the rate of flow of
the molten metal.

US Pat. No. 10,143,044

ELECTRIC INDUCTION HEATING OF STRIP OR SLAB MATERIAL

Inductotherm Corp., Ranc...

1. A rectangular sheet heating inductor having a variable cross sectional interior opening fora passage of a material through the variable cross sectional interior opening, the rectangular sheet inductor comprising:a fixed inductor side opposing a moveable inductor side; and
an adjustable first and second opposing sides, each of the adjustable first and second opposing sides comprising an outer fixed sheet inductor section and an inner moveable sheet inductor section, a first ends of the outer fixed sheet inductor sections of the adjustable first and second opposing sides connected to an opposing ends of the fixed inductor side and a first ends of the inner moveable sheet inductor sections of the adjustable first and second opposing sides connected to the opposing ends of the moveable inductor side;
a separate inductor side extension/retraction apparatus connecting a second end of the outer fixed sheet inductor section and a second end of the inner moveable sheet inductor section of each of the adjustable first and second opposing sides, the second end of the outer fixed sheet inductor section opposing the first end of the outer fixed sheet inductor section and the second end of the inner moveable sheet inductor section opposing the first end of the inner moveable sheet inductor section, each of the separate inductor side extension/retraction apparatus comprising a multi-hinged flexible apparatus having a series connected flexible electrical conductor sections configured in a wye when the adjustable first and second opposing sides are in a partially extended side position; a horizontally oriented closed wye when the adjustable first and second opposing sides are in a fully extended side position where the variable cross sectional interior opening is at a maximum size; and a vertically oriented open wye when the adjustable first and second opposing sides are in a fully retracted side position where the variable cross sectional interior opening is at a minimum size; and
a power source connection for connecting the rectangular sheet heating inductor to an alternating current source.

US Pat. No. 9,987,681

METHOD OF REPLACING A NOZZLE ASSEMBLY FOR A MOLTEN METAL HOLDING AND POURING BOX WITH DUAL POURING NOZZLES

INDUCTOTHERM CORP., Ranc...

1. A method of replacing an existing unitary dual nozzle assembly in a molten metal holding and pouring box with an upper rectangular-shaped section and a lower pyramidal-shaped section for pouring a molten metal into a pair of molds, the existing unitary dual nozzle assembly located in a bottom of the lower pyramidal-shaped section and having a pair of nozzles spaced apart from each other at a first distance, an insulating material surrounding the existing unitary dual nozzle assembly and a unitary dual nozzle assembly retention plate retaining the bottom of the existing unitary dual nozzle assembly in the molten metal holding and pouring box, the method comprising the steps of:removing the unitary dual nozzle assembly retention plate from the bottom of the existing unitary dual nozzle assembly by removing a pair of retaining fittings from a pair of retaining posts holding the unitary dual nozzle assembly retention plate to the bottom of the molten metal holding and pouring box;
removing a thermal insulating material surrounding the sides of the existing unitary dual nozzle assembly to release the existing unitary dual nozzle assembly from the molten metal holding and pouring box;
inserting a new unitary dual nozzle assembly into the bottom of the molten metal holding and pouring box, the new unitary dual nozzle assembly having the same overall dimensions as the existing unitary dual nozzle assembly, the new unitary dual nozzle assembly having a pair of new nozzles spaced apart from each other at a second distance, the second distance different from the first distance;
installing the thermal insulating material around the sides of the new unitary dual nozzle assembly;
thermally insulating the new unitary dual nozzle assembly from contact with the lower pyramidal-shaped section by a combination of the thermal insulating material surrounding the sides of the new unitary dual nozzle assembly and a thermal insulating standoff installed around an outlet of each one of the pair of new nozzles with the thermal insulating standoff disposed between a bottom of the unitary dual nozzle assembly and an upper side of the unitary dual nozzle assembly retention plate; and
installing the unitary dual nozzle assembly retention plate to the bottom of the new unitary dual nozzle assembly by inserting the pair of retaining fittings to the pair of retaining posts to hold the unitary dual nozzle assembly retention plate against the bottom of the new unitary dual nozzle assembly with the outlet of each of the pair of new nozzles thermally insulated from the new unitary dual nozzle assembly.

US Pat. No. 9,462,640

MELTING AND MIXING OF MATERIALS IN A CRUCIBLE BY ELECTRIC INDUCTION HEEL PROCESS

INDUCTOTHERM CORP, Ranco...

1. A method of melting a crucible batch of a transition material by gradually adding a solid or semi-solid charge of the transition
material to a molten heel of the transition material in a crucible having a plurality of induction coils surrounding the exterior
of the crucible, each one of the plurality of induction coils exclusively surrounding one of a plurality of partial interior
volumes of the crucible, the lowest one of the plurality of partial interior volumes comprising a bottom interior volume and
the highest one of the plurality of partial interior volumes comprising a top interior volume of the crucible, a first intermediate
interior volume disposed above the bottom interior volume, and a second intermediate interior volume disposed above the first
intermediate volume and below the top interior volume, each one of the plurality of induction coils connected to the output
of a separate alternating current power source, the method comprising the steps of:
loading the molten heel of the transition material into at least a bottom portion of the bottom interior volume and adjusting
the output of the separate alternating current power source connected to the one of the plurality of induction coils surrounding
the bottom interior volume to a melting frequency and a melting power level to keep the molten heel of the transition material
at least at the minimum melting temperature of the transition material;

sequentially adding the solid or semi-solid charge of the transition material into at least a portion of each of the first
intermediate interior volume and the second intermediate interior volume above the bottom interior volume while adjusting
the output of the separate alternating current power source connected to the one of the plurality of induction coils surrounding
the first intermediate interior volume and the second intermediate interior volume to which the solid or semi-solid charge
of the transition material is sequentially added to the melting frequency and the melting power level while synchronizing
the phase of an output voltage of the separate alternating current power source connected to the one of the plurality of induction
coils surrounding the first intermediate interior volume and the second intermediate interior volume to which the solid or
semi-solid charge of the transition material is sequentially added with the phase of the output voltage of the separate alternating
current power source connected to the one of the plurality of induction coils surrounding the bottom interior volume;

simultaneously adding the solid or semi-solid charge of the transition material into at least a top portion of the top interior
volume of the crucible subsequent to sequentially adding the solid or semi-solid charge of the transition material into the
first intermediate interior volume and the second intermediate interior volume to form the crucible batch of a molten transition
material and adjusting the output of the separate alternating current power source connected to the one of the plurality of
induction coils surrounding the top interior volume to the melting frequency and the melting power level while synchronizing
the phase of the output voltage of the separate alternating current power source connected to the one of the plurality of
induction coils surrounding the top interior volume with the phase of the output voltage of the separate alternating current
source connected to the one of the plurality of induction coils surrounding the bottom interior volume; and

simultaneously reducing the output of each one of the separate alternating current power sources to a stirring frequency and
a stirring power level while phase shifting the output voltages of each of the separate alternating current power sources
to induce a unidirectional electromagnetic stirring of the crucible batch of the molten transition material in the crucible,
the stirring frequency being lower than the melting frequency, and the stirring power level being lower than the melting power
level.

US Pat. No. 10,260,810

CHANNEL ELECTRIC INDUCTOR ASSEMBLY

INDUCTOTHERM CORP., Ranc...

1. An electric channel inductor assembly comprising:an outer shell having one or more bushings disposed within the outer shell for containment of an inductor coil and a core assembly in each of the one or more bushings;
a refractory between the outer shell and the one or more bushings; and
a hollow channel mold conformed to the shape of one or more flow channels, the hollow channel mold formed from a nonmagnetic metal composition non-deformable at a refractory heat treatment temperature and chemically dissolvable in a reaction liquid, the hollow channel mold disposed in the refractory between the outer shell and the one or more bushings.