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Class 373/138 - INDUCTION FURNACE DEVICE


Subclass of Class 373 - Industrial electric heating furnaces
Definition: Subject matter including an induction coil to subject the charge to a variable
No. of patents: 49
Last issue date: 03/25/2008


1    
NumberTitleIssue Date
7348691Magnetic levitation apparatus
A magnetic levitation apparatus supports a magnetic element in a magnetic field. A control system controls a variable magnetic field to maintain the magnetic element at an equilibrium location relative to an unstable axis. In some embodiments the variable magnetic f...
03/25/2008
7197061Directional solidification of a metal
A molten material can be heated, melted and directly solidified in a single vessel. Induction heating and melting of the molten material is achieved by magnetically coupling the field produced by current flow in a plurality of induction coils surrounding the vessel ...
03/27/2007
7167501Cold crucible induction furnace with eddy current damping
Apparatus and method are provided for damping the induced fluid flow, particularly in the region of the base plate, in an electrically conductive material that is heated and melted in a cold crucible induction furnace. Damping is accomplished by establishing a dc ma...
01/23/2007
7085305Induction heating apparatus and methods of operation thereof
Methods of operation of an induction melter include providing material within a cooled crucible proximate an inductor. A desired electromagnetic flux skin depth for heating the material within the crucible may be selected, and a frequency of an alternating current f...
08/01/2006
7034264Heating systems and methods utilizing high frequency harmonics
Heating systems and methods for inductive heating or a combination of resistive and inductive heating. A heater coil is inductively coupled to an article and a current signal is supplied to the heater coil. The heater coil generates a magnetic flux, based on the app...
04/25/2006
7034263Apparatus and method for inductive heating
A system and method for inductive heating, in which a power source provides current pulses with high-frequency harmonics to a heater coil, the coil generating a magnetic flux for inductive heating of an article. The high-frequency harmonics enhance a relative propor...
04/25/2006
7024888Method for changing glass compositions in melting installations, and corresponding melting installation
The invention relates to a method for changing glass compositions in continuously operated melting installations which has a significantly shortened melt changeover time and therefore lower costs and in which the glass quality is not adversely affected. ...
04/11/2006
7000678Electromagnetic continuous casting apparatus for materials possessing high melting temperature and low electric conductance
Disclosed is an electromagnetic continuous casting apparatus for a material having a low electric conductivity. The casting apparatus includes a crucible having a vertical axis. The crucible comprises an upper hot crucible and a lower cold crucible. The crucible is ...
02/21/2006
6999496High efficiency induction heating and melting systems
An induction heating and melting system uses a crucible formed from a material that has a high electrical resistivity or high magnetic permeability, and one or more inductor coils formed from a wound cable consisting of multiple individually insulated copper conduct...
02/14/2006
6819704Induction melting furnace with metered discharge
An induction melting furnace comprises a melt chamber for heating a melt either directly by magnetic induction, or indirectly by magnetic induction heating of the melt chamber, or a combination of the two, and a meter chamber connected to the melt chamber for provid...
11/16/2004
6757317Device for melting or purifying of inorganic sustances
A device for the melting or purifying of inorganic substances, in particular of glass, which comprises a number of metal tubes which may be attached to a cooling medium and which are arranged next to each other, in such a way that together they form a container, a h...
06/29/2004
6741632Ultra high temperature rapid cycle induction furnace
An induction furnace that has a plurality of high temperature electrically conductive ceramic electrodes having no connecting electrical lead (leadless electrode). The leadless electrodes are exterior to and proximate a working furnace space. At least one metallic e...
05/25/2004
6695035Electromagnetic induction casting apparatus
To restrict to a low level a temperature gradient of an ingot immediately after solidification in a bottomless crucible in a electromagnetic induction casting method using an electrically conductive bottomless crucible. An upper section and a lower sectio...
02/24/2004
6690710High efficiency induction heating and melting systems
An induction heating and melting system uses a crucible formed from a material that has a high electrical resistivity or high magnetic permeability, and one or more inductor coils formed from a wound cable consisting of multiple individually insulated cop...
02/10/2004
6577667Skull pot for melting or refining inorganic substances
According to the invention, the skull pot is provided with the following characteristics: a pot wall (1), a bottom (3) and an induction coil (9) which surrounds the pot wall (1) and by means of which high-frequency energy can be coupled into the contents ...
06/10/2003
6393044High efficiency induction melting system
An induction melting system uses a crucible formed from a material that has a high electrical resistivity or high magnetic permeability and one or more inductor coils formed from a wound cable consisting of multiple individually insulated copper conductor...
05/21/2002
6385231Induction heating furnace and bottom tapping mechanism thereof
An induction heating furnace includes a furnace body having a side wall extending so obliquely as to increase in radius from the bottom to the top edge portion and formed by a plurality of longitudinally split, conductive segments arrayed circumferentiall...
05/07/2002
6304590Formation of metal wire
An increased diameter wire is formed by drawing a feed wire through a cooled nozzle located in a cooled crucible, and through a liquid metal bath contained within the crucible. Liquid metal freezes onto the feed wire as it passes through the bath, thereby...
10/16/2001
6195382High temperature molten metal reactor and waste treatment method
A molten metal reactor (10) includes a reactor vessel having a heating section (11) formed from a dielectric material. The reactor vessel also includes a reaction section (12) connected to heating section (11). An induction heating coil (18) is associated...
02/27/2001
6014403Induction furnaces for the synthesis of glasses
In an induction furnace for the synthesis of glasses, in particular fluorozirconate glasses for optical fibres for telecommunications, the support device (6') for the crucible (3) is associated with a pair of sleeves (7, 9) between which an annular elemen...
01/11/2000
5339329Induction heated meniscus coating vessel
A shallow vessel (50,52) for being horizontally disposed when containing a molten metal or metal alloy (66) for meniscus coating one side of a clean metal strip (34A) when the strip is moved vertically past one side of the vessel. The vessel includes a sh...
08/16/1994
5319670Velocity damper for electromagnetically levitated materials
A system for damping oscillatory and spinning motions induced in an electromagnetically levitated material. Two opposed field magnets are located orthogonally to the existing levitation coils for providing a DC quadrupole field (cusp field) around the mat...
06/07/1994
5280495Furnace refractory extraction system and method
A furnace refractory extraction system and method includes a selectively removable bottom portion which is attached to a refractory extraction device associated with a container for drawing the refractory lining of a coreless induction furnace into the co...
01/18/1994
5280496Induction furnace with cooled crucible
An induction furnace includes a crucible having a plurality of cooled metallic segments (6A, 6B) electrically insulated from each other and an electromagnetic induction coil (5) arranged around the crucible, wherein the electromagnetic induction coil is e...
01/18/1994
5271033Induction furnace for melting and casting substances in a nonreactive atmosphere
A furnace chamber contains a chassis to which a closure plate for said chamber is removably fixed. A tilting frame is borne by said chassis in a pair of coaxial tilting bearings, one of which incorporates a rotary lead through for power lines and cooling ...
12/14/1993
5267258Fast melting induction furnace with pressing cover
In a fast-melting induction furnace, an elevationally movable pressing cover 4 suppresses the swell of molten metal 3 inside a crucible 2 on which a coil 1 is wound. The pressing cover 4 has a lower surface which is made concave. An upper half part of the...
11/30/1993
5242501Susceptor in chemical vapor deposition reactors
An improved chemical reactor of the type for depositing a layer of material epitaxially onto a wafer of single crystalline silicon is disclosed. The reactor has a susceptor for supporting each wafer in a cavity of the susceptor with the cavity being curvi...
09/07/1993
5241560Crucible induction furnace provided with a preventive measure against low melting point metals
A crucible induction furnace is disclosed which is provided with a preventive measure against low melting point metals and having a crucible refractory within an induction coil in a barrel container, in which the crucible induction furnace comprises a coi...
08/31/1993
5222096Induction furnace for melting and casting purposes with an enclosed crucible pot
An induction furnace (1) for melting and casting purposes has a closed crucible pot (2) with a pot bottom (3) and a cover (4), a crucible (6) housed in the crucible pot and surrounded by an induction coil (7), and an ascending tube (9) reaching into the c...
06/22/1993
5206880Furnace having tubes for cracking hydrocarbons
A furnace for cracking of hydrocarbons, comprising one or several tubes through which the hydrocarbons flow during intensive heating and subsequent cracking. The starting material for the process can be e.g. naphtha or propane, mixed with a small amount o...
04/27/1993
5197081magnetic return apparatus for coreless induction furnaces
An apparatus for directing electromagnetic flux near an induction coil comprises a loop-shaped member adapted to conduct electromagnetic flux, defining an axis parallel to the central axis of the induction coil and extending substantially the length of th...
03/23/1993
5144108Kiln for producing litharge by means of the calcination of massicot
The kiln (1) for producing litharge has a thermally insulated tubular body (2) containing, throughout its length, a shaft (30) with paddles acting as an auger. The tubular body (2) is coaxial with an induction coil (11), which heats it. The raw material i...
09/01/1992
5121406Induction melting furnace
The invention relates to an induction melting furnace 1 for metals which are difficult to melt including an induction coil 2 surrounding the crucible 3 and a mold receptacle 4 surrounded by an annular chamber 5 to hold the cooling agent. The crucible 3 is...
06/09/1992
5109389Apparatus for generating an inductive heating field which interacts with metallic stock in a crucible
An apparatus for melting metallic stock as a crucible in which the metallic stock is received and melted, the stock in the crucible having an axis along which the force of gravity varies, and an inductive heating system which generates an inductive heatin...
04/28/1992
5003551Induction melting of metals without a crucible
An apparatus and method for inductively melting a quantity of metal, without having to contain the metal in a crucible, is described. The solid metal to be melted is placed within a first induction coil excited by an alternating current and adapted to pro...
03/26/1991
4993043Device for positioning and melting electrically conductive materials without a receptacle
Two coils between which a sample is contactlessly held in a suspended state, form a common part of two different oscillating circuits. A heating oscillating-circuit consists of the two coils and two first capacitors. A positioning oscillating-circuit cons...
02/12/1991
4979182Device for positioning and melting electrically conductive materials without a receptacle
Two coils, between which a sample is kept in a contactless suspended state, are connected to separate power sources, at least one of which comprises a phase shifter. Both power sources are controlled by a common oscillation generator. If both currents in ...
12/18/1990
4931610Induction heated rotary kiln
An improved rotary kiln having an elongated kiln member formed of refractory material and supported for rotation, a tubular liner in the kiln member formed of electrically conductive material, a stationary tubular structural non-electrically conductive me...
06/05/1990
4867848Process and apparatus for producing moulded coke in a vertical furnace which is at least partly electrically heated
An apparatus and process for producing coke in a vertical furnace having an upper part for preheating and devolitalizing raw ovoids of coal, an electrically heated median part for carbonizing and coking the ovoids and a lower part for partially cooling th...
09/19/1989
4723996Method and device for producing refractory materials by induction
A method and device are provided for producing refractory materials by induction, in which process a mixture of material powders and a binder in solution in water are compacted by extrusion so as to form a solid bar. The bar is introduced into a cold cruc...
02/09/1988
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