Mounting Patents (Class 373/128)
  • Patent number: 10059619
    Abstract: An electric glass hot shop system is described herein that has at least one electrically powered heating unit (e.g., electric furnace, electric glory hole, electric pipe warmer, electric color box, electric annealer, electric crucible kiln) used in the processing of glass.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: August 28, 2018
    Assignees: Corning Museum of Glass, Spiral Arts Inc.
    Inventors: Steven Thomas Gibbs, Fred Charles Metz
  • Patent number: 8494026
    Abstract: A suspension arrangement for terminals for electrical resistive elements, which terminals pass vertically through a body and are attached relative to the upper surface of the body, which terminals pass over into the hot zone of the resistive element in the form of a shank element, which extends downwards from the terminals, where one or several of the shanks of the hot zone is or are supported by hooks attached to the lower surface of the body. The suspension arrangement for each one of the terminals includes a first attachment attached relative to the upper surface of the body and a second attachment attached relative to the terminal. A spring arrangement passes between the first and the second attachment, which spring arrangement is arranged such that the second attachment is mobile in the vertical direction relative to the first attachment.
    Type: Grant
    Filed: November 26, 2008
    Date of Patent: July 23, 2013
    Assignee: Sandvik Intellectual Property AB
    Inventor: Jan Andersson
  • Patent number: 8303711
    Abstract: An electrode anchoring structure in a crystal-growing furnace includes at least one graphite electrode pillar, at least one metal electrode pillar, at least one anchoring base, and at least one locking nut, wherein the graphite electrode pillar is engaged with a nut base of the metal electrode pillar, and the at least one metal electrode pillar is, through the anchoring base, is secured to furnace wall. Therefore, the at least one graphite electrode pillar acts both as weight support and electrical-conducting electrode. Since the flange welded on furnace wall has a greater area exposed to the atmosphere, a desirable cooling effect can be achieved, and temperature drop can be expedited if water spray is performed. The anchoring base is provided with a resilient washer, such that a resilient force can be employed to adjust loading of each graphite electrode pillar in an axial direction.
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: November 6, 2012
    Assignee: Green Energy Technology Inc.
    Inventors: Shiow-Jeng Lew, Hur-Lon Lin
  • Patent number: 8263914
    Abstract: This invention relates to an electric cartridge heater and a method of operation, suitable for use in producing high purity silicon in solar cells or solar modules. The apparatus includes a single-piece elongated heater bar having a length, a first end, and a second end. The apparatus also includes a slot beginning at the first end and running a portion of the length, and the slot dividing the heater bar into a first arm and a second arm. An elbow at the second end joins the first arm and the second arm together. The apparatus also includes a first electrode in electrical communication with the first arm, and a second electrode in electrical communication with the second arm.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: September 11, 2012
    Assignee: AMG IdealCast Corporation
    Inventor: Roger F. Clark
  • Patent number: 8177548
    Abstract: Device for mounting a forced-air burner 2 to a combustion chamber housing 4, having an attaching section to attach the device to a combustion chamber housing 4 demarcating a combustion chamber or to a unit 5 located on a combustion chamber housing 4 and a seating section to absorb forces and/or moments caused by a forced-air burner 2 located on the device.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: May 15, 2012
    Assignee: Elco Burners GmbH
    Inventors: Sebastian Kretschmer, Enrico Seemann, Torsten Lohse, Klaus Beckmann, Hendrik Kretzschmar
  • Patent number: 8134100
    Abstract: A heat processing furnace comprises: a processing vessel for receiving an object to be processed by a heat process; a cylindrical heat insulation member surrounding the processing vessel; a helical heating resistor arranged along an inner peripheral surface of the heat insulation member; a support member for supporting the heating resistor. The support member includes a base part positioned on an inside of the heating resistor, and a plurality of support pieces extending radially outward from the base part through spaces between adjacent portions of the heating resistor so as to support the heating resistor, the support member being formed to have a comb-like shape. An upper surface part of each of the support pieces is formed to have a curved shape in order to reduce a frictional resistance generated when the heating resistor is moved upon a thermal expansion and a thermal shrinkage thereof.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: March 13, 2012
    Assignee: Tokyo Electron Limited
    Inventors: Makoto Kobayashi, Ken Nakao
  • Patent number: 7971836
    Abstract: A supporting table having heaters inside a crystal-growing furnace includes a table plate and a plurality of supporting posts, wherein the supporting posts support the table plate and are, respectively, electrically connected with the heaters. Each supporting post includes, among others, a graphite electrode post, a metal electrode post, and an anchoring base. The supporting posts are each with its graphite electrode post screwed to a nut portion of the metal electrode post, and with the metal electrode post fixed to a wall of the crystal-growing furnace. The anchoring base includes, among others, a flange and an elastic washer, where the flange is welded to the wall of the furnace, and with the help of elasticity adjustment of the elastic washer, the supporting table can bear an equal distribution of loading from the supporting posts.
    Type: Grant
    Filed: May 29, 2008
    Date of Patent: July 5, 2011
    Assignee: Green Energy Technology Inc.
    Inventors: Shiow-Jeng Lew, Hur-Lon Lin
  • Patent number: 7888622
    Abstract: A heat-processing furnace comprises: a processing vessel for housing an object to be processed to thermally heat the object to be processed; a cylindrical heat insulating member surrounding the processing vessel; a helical heating resistor disposed along an inner circumferential surface of the heat insulating member; and support members axially disposed on the inner circumferential surface of the heat insulating member, for supporting the heating resistor at predetermined pitches. A plurality of terminal plates are disposed outside the heating resistor at suitable intervals therebetween and attached to the heating resistor, the terminal plates radially passing through the heat insulating member to be extended outside. A plurality of fixing plates are disposed outside the heating resistor at suitable intervals therebetween and attached to the heating resistor, the fixing plates being fixed in the heat insulating member.
    Type: Grant
    Filed: September 20, 2007
    Date of Patent: February 15, 2011
    Assignee: Tokyo Electron Limited
    Inventors: Ken Nakao, Kenichi Yamaga, Makoto Kobayashi
  • Patent number: 7838802
    Abstract: The present invention provides a radiation apparatus with capability of preventing heat convection, which comprises a blackbody furnace having a cavity therein and an air pressure adjusting unit. The air pressure adjusting unit coupled to the blackbody furnace for adjusting the air pressure of the open end of the cavity according to the temperature difference between the cavity and the outside environment. By means of the design of the present invention, it is capable of preventing heat convection between the cavity and the outside environment by utilizing the air pressure adjusting unit for controlling the air pressure status around the open end of cavity such that the blackbody furnace is stable for services of calibrations and tests.
    Type: Grant
    Filed: December 30, 2007
    Date of Patent: November 23, 2010
    Assignee: Industrial Technology Research Institute
    Inventors: Bor-Jiunn Wen, Hsin-Yi Ko
  • Publication number: 20100290499
    Abstract: Electric heating device comprising a radiant tube and an electrical heating element arranged in the radiant tube as well as a protective insert of electrically conductive material. The protective insert is arranged between the radiant tube and the electrical heating element. The device allows the use of higher element power.
    Type: Application
    Filed: December 10, 2007
    Publication date: November 18, 2010
    Applicant: Sandvik Intellectual Property AB
    Inventor: Thomas Lewin
  • Publication number: 20100278208
    Abstract: A suspension arrangement for terminals for electrical resistive elements, which terminals pass vertically through a body and are attached relative to the upper surface of the body, which terminals pass over into the hot zone of the resistive element in the form of a shank element, which extends downwards from the terminals, where one or several of the shanks of the hot zone is or are supported by hooks attached to the lower surface of the body. The suspension arrangement for each one of the terminals includes a first attachment attached relative to the upper surface of the body and a second attachment attached relative to the terminal. A spring arrangement passes between the first and the second attachment, which spring arrangement is arranged such that the second attachment is mobile in the vertical direction relative to the first attachment.
    Type: Application
    Filed: November 26, 2008
    Publication date: November 4, 2010
    Applicant: SANDVIK INTELLECTUAL PROPERTY AB
    Inventor: Jan Andersson
  • Patent number: 7649158
    Abstract: The invention relates to a furnace (10) for heating preforms (20), of the type that comprises a preform-heating tunnel (12). According to the invention, the tunnel consists of a heating module (18) comprising vertical walls (14, 16) between which the preforms (20) travel. Moreover, at least one wall (16) of the module (18) is provided with at least one heating means (32) which is mounted to supports (34) such that it can move transversely and means (40) for adjusting the transverse position of the heating means (32) comprising at least one member (42) for controlling the movement of the heating means (32) between at least two indexed positions. The invention is characterized in that the control member (42) comprises an indexing boss (54) which can deform elastically such as to fit inside the complementary indexing notches (56, 58) on the corresponding support (34) at proximal and distal positions respectively.
    Type: Grant
    Filed: July 1, 2005
    Date of Patent: January 19, 2010
    Assignee: Sidel Participations
    Inventor: Christophe Doudement
  • Patent number: 7595465
    Abstract: Device for keeping a heating wire (2) in position in a horizontal oven includes a ceramic bar (3) and a number of ceramic spacer elements (4). Each spacer element consists of a bar-shaped part, on which a Y-shaped part (6) is placed near the center of the bar-shaped part. The V-shaped part of the Y-shaped part can partially enclose the bar. Near one end, the bar-shaped part is preferably provided with a transverse part, which is at right angles to the bar-shaped part and runs parallel to the Y-shaped part, so that a U-shaped recess is created which can accommodate the heating wire and the other side of the Y-shaped part and the bar-shaped part together form an L-shaped recess in which the heating wire can also be accommodated. The one end of each spacer element is provided with a projection and the other end with a recess.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: September 29, 2009
    Assignee: Tempress Systems, Inc.
    Inventor: Barteld Kolk
  • Patent number: 7498544
    Abstract: A firing furnace having a structure, which prolongs the durability of an insulative member, includes a plurality of heat generation bodies, arranged in the housing, for generating heat with power supplied from an external power supply, a connection member for connecting the external power supply and the heat generation bodies, a fixing member attached to the housing and including an insertion hole for receiving the connection member, an insulative member for sealing the space between the insertion hole and the connection member, and a restriction structure for restricting a flow of gas produced in the housing directed through a gap between the fixing member and the connection member and toward the insulative member.
    Type: Grant
    Filed: December 22, 2005
    Date of Patent: March 3, 2009
    Assignee: IBIDEN Co., Ltd.
    Inventors: Takamitsu Saijo, Koji Higuchi
  • Patent number: 7423242
    Abstract: Oven for non-metal melting, in particular silicon melting, with a housing enclosing an interior, at least one mould arranged in the interior for receiving a non-metal melt, at least one electrical heating device enclosing, at least partially, the at least one mould for influencing the temperature of the non-metal melt, and a power supply device connected in an electrically conductive manner to the at least one heating device for providing the heating device with a time-variable current I(t), wherein the current I(t) has a frequency of 0.1 Hz to 1000 Hz and the current I(t) is of a magnitude sufficient for setting a predetermined temperature of the non-metal melt, the currents in the plurality, where necessary, of heaters having a defined phase position in respect of one another.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: September 9, 2008
    Assignee: Deutsche Solar AG
    Inventors: Marc Dietrich, Bernhard Freudenberg, Armin Müller, Jens Seidel, Josef Stenzenberger
  • Patent number: 7078656
    Abstract: A device for electrically heating a vertically erect chamber comprising several heating zones arranged vertically one above the other. The components of the device, with the exception of the insulating components, are made from graphite materials. Each zone (Z) comprises a number of supports (1), arranged in an essentially even distribution around the chamber for heating, which simultaneously serve as electrical supplies for the heater, and the heater for each zone (Z) is fixed at one end and longitudinally displaceable at the other end.
    Type: Grant
    Filed: April 9, 2002
    Date of Patent: July 18, 2006
    Assignee: Solarworld Aktiengesellschaft
    Inventors: Heiko Herold, Günter Holdenried, Leslaw Mleczko, Matthias Pfaffelhuber, Theo König
  • Patent number: 6807220
    Abstract: A heating assembly for use in an electric furnace includes a helical heating element encircled by thermal insulation, and rows of spacers for keeping turns of the heating element spaced apart by predetermined distances. Each spacer includes circumferential side portions facing generally in a circumferential direction of the heating element and converging toward a center region of the spacer to form a radial undercut against which the insulation abuts. The spacers of each row have through holes extending parallel to a longitudinal axis of the heating element. A guide rod extends through the through holes of each row of spacers.
    Type: Grant
    Filed: May 23, 2003
    Date of Patent: October 19, 2004
    Assignee: MRL Industries
    Inventor: Kevin B. Peck
  • Patent number: 6758902
    Abstract: A furnace for growing a high volume of crystals includes a plurality of individual growth stations and first and second heater matrixes. Each individual growth station has a crucible and an insulating container generally surrounding the crucible and thermally isolating the crucible from the other individual growth stations. The first and second heater matrices each include at least two legs electrically connected in parallel and each of the legs have at least two resistance heaters electrically connected in series. Each of the individual growth stations have at least one of the resistance heaters within the first heater matrix and at least one of the resistance heaters within the second heater matrix associated therewith. The resistance heaters of the first heater matrix are located above the crucibles and are preferably adapted to provide a homogeneous temperature across tops of the crucibles.
    Type: Grant
    Filed: February 13, 2003
    Date of Patent: July 6, 2004
    Assignee: American Crystal Technologies, Inc.
    Inventor: John D. Schupp
  • Patent number: 6723968
    Abstract: A conductive metal jumper strap has a plate portion with a pair of connection legs forming a u-shape. The connection legs are adapted to connect to terminals to make an electrical connection between two components of a heating device. The plate portion has a bend in it to allow flexing so that the connection legs can make a jumper connection between terminals where the terminal spacing may vary between heating devices.
    Type: Grant
    Filed: April 25, 2003
    Date of Patent: April 20, 2004
    Assignee: Tutco, Inc.
    Inventors: Michael Danko, Jimmy L. Sherrill, Keith Howard
  • Patent number: 6307874
    Abstract: A heating element for a vacuum heat treating furnace, a hot zone for a vacuum heat treating furnace, and a vacuum furnace are disclosed. The heating element includes a first heating element portion formed of a thin form of conductive, refractory metal or alloy, and an expansion loop formed in or attached to the first heating element portion, to absorb expansive and contractive forces on the element due to thermal cycling. The heating elements are disposed around the interior surface of the hot zone, which includes a sidewall formed of thermally insulating material. The vacuum heat treating furnace includes a pressure vessel and a hot zone disposed within the pressure vessel.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: October 23, 2001
    Assignee: Ipsen International, Inc.
    Inventor: Craig A. Moller
  • Patent number: 6125134
    Abstract: An electric furnace assembly includes an elongated metallic resistor element, which is supported adjacent to a furnace wall. The resistor element is bent back and forth in its longitudinal direction and is retained by fixed holding member at positions located furthest away from the furnace wall so as to permit a controlled elongation of the resistor element.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: September 26, 2000
    Assignee: Kanthal AB
    Inventors: Bo Jonsson, Thomas Lewin, Jonas Magnusson
  • Patent number: 6111908
    Abstract: An electrical insulating and heating element support mechanism for a high temperature vacuum furnace having a support rod with an electrical insulating and support mechanism for connecting a heating element to the rod in an electrically non-connected position includes insulators and cup shaped shields each with a wall radially surrounding an insulator. The electrically non-connected shield wall is spaced from the heating element and the insulator radial surface but covers at least a portion of the insulator radial surface to protect the mechanism from deposition of conductive materials that could cause shorts that could damage the furnace and materials being treated in the furnace. The walls of the cup shaped shields can be shaped in a number of different ways, for example, cylindrical or flared, but desirably have a circular radial dimension. The shields are desirably made with graphite.
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: August 29, 2000
    Inventor: William R. Jones
  • Patent number: 6023487
    Abstract: This invention relates to heat treating furnaces which employ electric resistance heating elements and, in particular, to improved processes for repairing such furnaces and heating elements particularly useful in such repair. A typical vacuum furnace employing this invention provides a hot zone that is made for heavy duty heat treating applications. The furnace has a series of banks of axial-spaced electrical resistance heating elements suspended from an inner wall of its hot zone chamber by a series of support rods. Repeated furnace use can result in heating element fractures, which necessitate replacement of the heating elements. The replacement in accordance with this invention is with an element having a thicker and narrower cross section than previously existed in the furnace. The specially designed width-to-thickness aspect ratio heating elements according to this invention enables the elements to have a longer life between replacements.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: February 8, 2000
    Inventor: William R. Jones
  • Patent number: 6021155
    Abstract: The present invention provides a high temperature vacuum furnace including a hot zone, which is made for heavy-duty heat treating applications. In a preferred embodiment, the hot zone chamber has an outer and an inner wall. The inner wall includes a heat shield secured to it for containing radiant energy. The hot zone chamber further includes a plurality of banks of electric resistance heating elements spaced axially within the chamber. Heating elements in furnaces according to this invention have a specially designed width-to-thickness aspect ratio, which enables heating elements to have a longer life between replacements. These heating elements can be designed in polygon banks or arrays, which virtually completely surround the workpiece and provide maximum temperature uniformity during heating.
    Type: Grant
    Filed: May 6, 1999
    Date of Patent: February 1, 2000
    Inventor: William R. Jones
  • Patent number: 5930285
    Abstract: A support or hanger for an electric heating element in a heat treating furnace is disclosed. The heating element support includes a support arm having first and second end portions. First and second ceramic sleeves extend transversely through the support arm and a bracket surrounds at least three sides of the support arm. The bracket is dimensioned and positioned to engage with, and thereby support, the electric heating element. First and second pairs of ceramic spacers are disposed annularly on said first and second ceramic sleeves, respectively. The ceramic spacers are positioned between the bracket and the support arm to prevent contact between the support arm and the bracket. A pin is disposed within each of the first and second ceramic sleeves and extends through the bracket to support and retain the ceramic sleeves, the ceramic spacers, and the bracket on the support arm. In this arrangement, the heating element bears on the metallic bracket and does not cause wear or damage to the ceramic elements.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: July 27, 1999
    Assignee: Ipsen International, Inc.
    Inventor: Craig A. Moller
  • Patent number: 5864576
    Abstract: An electric furnace includes a heating element which is a hollow element made of a lanthanum chromite ceramic having an interior with two open ends in an longitudinal direction, terminal portions at the two ends, and a heat-generating portion between the terminal portions. The terminal portion has a cross-sectional area larger than that of the heat-generating portion on a plane perpendicular to the longitudinal direction. The heating element is provided with high-temperature electrodes and metallic lead wires attached to the terminal portions to generate heat in the heat-generating portion. The electric furnace further includes a heat-insulating material surrounding the heating element, and a hollow ceramic member placed in the interior of the heating element.
    Type: Grant
    Filed: October 1, 1997
    Date of Patent: January 26, 1999
    Assignee: Nikkato Corp.
    Inventors: Masanori Nakatani, Takeshi Abe, Toshio Kawanami
  • Patent number: 5809056
    Abstract: A Deglor furnace includes heating elements each having a heater rod being surrounded by a protective tube. The protective tube is mounted on a ceiling of the Deglor furnace and is run through an opening in the ceiling into the interior of the Deglor furnace. Heat insulation of the ceiling which borders the opening is protected against corrosive gases from the interior by a shield.
    Type: Grant
    Filed: December 26, 1995
    Date of Patent: September 15, 1998
    Assignee: ABB K.K.
    Inventors: Helge Jansen, Ludwig Weiler, Christian Wieckert
  • Patent number: 5605645
    Abstract: A heating element for a Deglor furnace includes a heating bar being surrounded by a protective tube. The protective tube is provided with a flange for mounting. The flange is formed by a separate ceramic ring or a metal clip and is permanently connected mechanically or chemically to an outer surface of the protective tube.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: February 25, 1997
    Assignee: ABB Gadelius KK
    Inventors: Anke Brandstadter-Springer, Ludwig Weiler, Hans Ammon, Fritz Hegewaldt
  • Patent number: 5502742
    Abstract: A heat treating furnace has a hot zone enclosure with a substantially rectangular cross section. The floor of the hot zone enclosure is formed such that it is removable independently of the remainder of the hot zone enclosure. The heat treating furnace has a heating element with a novel support element that is readily mounted on and removed from the hot zone enclosure and which adjusts to accommodate a wide range of heating element thicknesses and insulation shield thicknesses. The electrically insulating components of the support element are formed to resist electrical shorting resulting from metallization and to resist cracking from thermally induced stress. The heat treating furnace further includes a cooling gas injection nozzle formed to reduce turbulence in the injected gas stream and to be readily attached to or removed from the hot zone enclosure.
    Type: Grant
    Filed: February 26, 1993
    Date of Patent: March 26, 1996
    Assignee: Abar Ipsen Industries, Inc.
    Inventors: Charles Kellogg, Charles Schmidt
  • Patent number: 5497394
    Abstract: A vacuum furnace has a heating chamber heated by metal strip electric heater elements. The elements have insulated mechanical support between their ends to hold them in position in the furnace. Support is provided by a ceramic post having an internal thread in an outer end threaded onto a rod secured to a portion of the furnace. A transverse member at an inner end of the post includes a straight surface normal to the length of the post for engaging the heater element. The heater element is compliantly connected to the straight surface. One embodiment of heater element support is in the form of a T-shaped ceramic post having an internal thread in the leg of the T and a ceramic crossbar having a straight surface normal to the length of the post for receiving the heater element. Another embodiment has a ceramic post having an internal thread in the outer end of the post and a metallic crossbar having a straight surface normal to the length of the post for receiving a heater element.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: March 5, 1996
    Assignee: Grier-Jhawar-Mercer, Inc.
    Inventors: Suresh C. Jhawar, John K. Grier, Brian K. Grier
  • Patent number: 5442158
    Abstract: An apparatus for supporting a heating element in a channel formed in a heater base is disclosed. A preferred embodiment includes a substantially U-shaped tantalum member. The U-shape is characterized by two substantially parallel portions of tantalum that each have an end connected to opposite ends of a base portion of tantalum. The parallel portions are each substantially perpendicular to the base portion and spaced apart a distance not larger than a width of the channel and not smaller than a width of a graphite heating element. The parallel portions each have a hole therein, and the centers of the holes define an axis that is substantially parallel to the base portion. An aluminum oxide ceramic retaining pin extends through the holes in the parallel portions and into a hole in a wall of the channel to retain the U-shaped member in the channel and to support the graphite heating element.
    Type: Grant
    Filed: November 24, 1993
    Date of Patent: August 15, 1995
    Assignee: United States Department of Energy
    Inventor: William C. Sawyer
  • Patent number: 5335310
    Abstract: A modular type heating unit or assembly having particular utility for use in a high temperature electric furnace, preferably in a group arrangement, comprises an insulating fibrous refractory block, a pair of spaced apart support rods, inner and outer support tubes and a heating element. Both the heating element and the support rods are formed of alloys to enable operation at relatively high temperatures. By utilizing this concept of modular element/insulation units, furnaces can be operated at relatively higher temperatures than is currently possible for exposed electrical element type furnaces.
    Type: Grant
    Filed: January 5, 1993
    Date of Patent: August 2, 1994
    Assignee: The Kanthal Corporation
    Inventors: George Novy, Angelo Makris
  • Patent number: 5282221
    Abstract: A ceramic high temperature vacuum furnace heating element standoff 10 is provided to hold a portion of an electrical high temperature heating element 62 inside the hot zone of a vacuum furnace. The standoff 10 comprises a heating element holder 18 and an anchoring rod 16. The heating element holder 18 is designed as a single ceramic piece constructed to retain the vacuum furnace heating element. The anchoring rod 16 has a straight end 50 and a hooked end 52. The straight end 50 is inserted into a neck 34 of the heating element holder 18 where the rod is retained by a pin 60. The standoff 10 is held to the vacuum furnace wall 58 by engagement of the hooked end 52 with a transverse pin 86 in a pipe-like member 82 welded to the vacuum furnace wall 58.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: January 25, 1994
    Assignee: Rolock, Inc.
    Inventors: James R. Benedict, Carl H. Mamigonian
  • Patent number: 5251231
    Abstract: An electrically heated vacuum furnace has a plurality of heating elements (13) distributed in an array extending within the furnace. This allows accurate control of the application of radiant heat energy from the elements (13) of the array to articles (10) within the furnace. The elements (13) are preferably disposed spaced apart across the width of the furnace.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: October 5, 1993
    Assignee: Ipsen Industries International GmbH
    Inventors: Michael N. Croker, Michael G. Ellis
  • Patent number: 5193100
    Abstract: An electrically heated vacuum furnace is provided with special lead-through devices for transmitting current to the heating elements. In order to recognize gas discharges which can occur between a lead-through and a tank wall, the insulation of the lead-through is surrounded by an auxiliary electrode. A thermocouple can also be used instead of an auxiliary electrode. A signal derived from the auxiliary electrode can be used to shut off the furnace power to avoid damage thereto.
    Type: Grant
    Filed: June 21, 1991
    Date of Patent: March 9, 1993
    Assignee: Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    Inventors: Robert Hack, Wilhelm Polhede
  • Patent number: 4870256
    Abstract: A holding element for heating bars in industrial furnaces must be as flexible as possible so that it can accommodate the thermal expansion of the heating bars. Circular rings or circular-ring sectors provided with bores and made from a flexible graphite laminate plate are used for this purpose.
    Type: Grant
    Filed: June 3, 1988
    Date of Patent: September 26, 1989
    Assignee: Degussa Aktiengesellschaft
    Inventors: Wolfgang Heise, Georg Kell, Rolf Schuster
  • Patent number: 4712086
    Abstract: The invention relates to a support frame for a resistor element in a heating furnace for glass sheets, said flame providing a substantially continuously extending, elongated rest surface for a resistor element. The support frame elements consist of trough-like castings and are fastened to each other in an articulated manner. The short frame elements are easy to cast and can be assembled into long continuous support frames for resistor elements, the thermal stresses of said frames not passing over the link points. A long continuous support frame structure makes it accordingly possible to employ resistor elements that are long and continuous and thus readily replaceable.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: December 8, 1987
    Assignee: O/Y Kyro A/B Tamglass
    Inventors: Pauli T. Reunamaki, Erkki P. J. Yli-Vakkuri, Kauko K. Anttonen
  • Patent number: 4620309
    Abstract: A furnace with the end portions of a heater supporting anchor rod embedded in the rigid sidewall insulation of the furnace. The anchor rods do not deflect under the weight of the heaters and the entire weight of the anchor rods and heaters is supported by the sidewall insulation.
    Type: Grant
    Filed: March 29, 1985
    Date of Patent: October 28, 1986
    Assignee: PPG Industries, Inc.
    Inventors: Stephen J. Schultz, John F. Huebner, Duane E. Wiedor, Dennis S. Pribish
  • Patent number: 4606037
    Abstract: The heater member of a furnace for heating the crucible used for fusing raw materials for a semiconductor single crystal is provided with reinforcing members made of a material such as alumina or pyrolytic boron nitride which excels in electric insulating property, resistance to heat, and strength. When a magnetic field with an alternating current or pulsating current of electricity is applied to the site of single crystal growth for the purpose of stabilizing the growth of the single crystal, the furnace tends to sustain breakage. These reinforcing members thus used on the heater member impart improved durability to the furnace and enable the apparatus as a whole to enjoy a long service life.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: August 12, 1986
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventors: Kazutaka Terashima, Tsuguo Fukuda
  • Patent number: 4589634
    Abstract: A furnace for smelting nonferrous metals and/or for holding nonferrous metal melts is proposed which has a multiple-chamber trough having at least one filling chamber, at least one smelting chamber and/or one holding chamber and at least one drain chamber, and at least one lid for covering the smelting chamber and/or the holding chamber. The filling chamber communicates with the smelting or holding chamber through a passage and the smelting or holding chamber communicate with the drain chamber through another passage. All passages are located beneath the surface of the metal melt introduced into the furnace. The furnace also has a tapping-off device including a stationary molded piece located at the bottom of the drain chamber where it defines an outflow opening, and a tubular tap plug which is rotatably mounted to the stationary molded piece at one end and extends outwardly from the furnace with its other end.
    Type: Grant
    Filed: March 17, 1983
    Date of Patent: May 20, 1986
    Inventor: Gerhard Bleickert
  • Patent number: 4550411
    Abstract: A molecular or atomic beam source for use in molecular beam epitaxy comprises a hollow cylindrical crucible, preferably made of boron nitride, which is heated by an electric current passed through a plurality of very thin elongate metal strips disposed outside of and spaced apart from said crucible and mounted parallel to its axis. In order to maintain the strips in the correct position irrespective of temperature, they may be mounted on springs at each end, but preferably they are made in self supporting pairs linked at the open end of the crucible and mounted on brackets at the other end. The thin strips can be made self supporting by folding along lines parallel to their long axis in a variety of ways. They are arranged to present a large surface area to the crucible which ensures efficient heating and increases the maximum operating temperature of the source.
    Type: Grant
    Filed: June 9, 1983
    Date of Patent: October 29, 1985
    Assignee: VG Instruments Group Limited
    Inventors: Paul R. Stonestreet, David Williams, Kenneth Anderson, Peter J. L. Butcher
  • Patent number: 4542513
    Abstract: A stacked type heater construction particularly suitable for large HIP apparatus, having a number of heating unit assemblies stacked one on another to provide a vertical series of independently controllable heating zones, the heater including a generally cylindrical heater retaining cage constituted by a number of annular graphitic members serving as girdle frames and a number of graphitic support columns serving as vertical frames, the annular members and support columns being connected with each other through electric insulators and defining a series of divided sections around the heater retaining cage in each one of the heating zones; and a plurality of segmental graphitic heating elements supported in the respective divided sections of the heater retaining cage through electric insulators to form an independent heating circuit in each heating zone.
    Type: Grant
    Filed: August 5, 1983
    Date of Patent: September 17, 1985
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventor: Yoichi Inoue
  • Patent number: 4523321
    Abstract: A vertical carbonizing furnace for use in the production of carbon fibers is provided with a vertically extending conduit of hollow rectangular parallelepiped. The lower end of the conduit is immersed in water thereby making a water seal from environmental air. The conduit is also provided with a gas withdrawal outlet which communicates with the upper portion of the conduit through a gas feeding duct for reuse. The mixture of a vapor evaporated from the water seal and an inert gas is withdrawn from the gas withdrawal outlet and fed to the upper portion of the conduit as gas for sealing thereby preventing fibers and the conduit made of carbon or graphite from being deteriorated by said vapor evaporated from the water seal and providing a gas for sealing the upper end of the conduit.
    Type: Grant
    Filed: May 26, 1983
    Date of Patent: June 11, 1985
    Assignee: Toray Industries, Inc.
    Inventors: Yukihiro Murakami, Shigeomi Murakami, Katsunosuke Maeda
  • Patent number: 4520487
    Abstract: A high temperature electric furnace has along its side walls vertical hollow electric resistance heating tubes (57) interconnected in serpentine fashion by conductive bridge plates (55). The tube ends and bridge plates are so contoured as to provide substantially uniform resistance along all possible current paths, thereby to avoid preferential current conduction with localized overheating. The bridge plates (55) and/or the tube ends are supported by air-cooled hollow hangers (28,45).
    Type: Grant
    Filed: March 10, 1983
    Date of Patent: May 28, 1985
    Inventor: Louis Graniou
  • Patent number: 4510609
    Abstract: A furnace for growing large single crystals from materials having high meng temperatures using the vertical solidification of melt method. The crucible containing the melt being encased in a muffle with vertically oriented heating rods arranged in a circular pattern around the outside of the muffle. The tops of the heating rods being electrically connected to a continuous graphite ring, and the bottoms of equal numbers of rods being electrically connected to two semi-circular sections of graphite. The power feeds for the heating rods being vertically brought into the furnace from the bottom for electrical connection to the semi-circular sections of graphite.
    Type: Grant
    Filed: January 31, 1984
    Date of Patent: April 9, 1985
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Jaroslav L. Caslavsky, Gerald H. Lavoie, William H. Earle, Dennis J. Viechnicki
  • Patent number: 4503319
    Abstract: A heater for use in the HIP apparatus for treating a work item or work items in a high temperature and pressure gas atmosphere by isostatic application of pressure in a heated condition, the heater including at least one heater assembly unit including a meandering heating element arranged into a cylindrical grid-like form having axial slits open alternately at the upper and lower ends thereof; a plurality of radial projections of a predetermined width extending radially outward from the upper ends of the meandering heating element at a number of predetermined positions including terminal ends thereof; a number of mounted holes formed through the radial extensions of the heating element; a number of support columns fixedly erected respectively on retaining members and having a male screw portion at the upper ends thereof respectively protruded upwardly through the mounting holes in the radial extensions of the heating element; and a number of nuts respectively threaded and tightened on the protruded ends of th
    Type: Grant
    Filed: November 22, 1982
    Date of Patent: March 5, 1985
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Masato Moritoki, Takao Fujikawa, Kazuo Kitagawa, Junichi Miyanaga
  • Patent number: 4429403
    Abstract: An arrangement for mounting and insulating strip sheet heating elements in the heated interior of vaccum furnaces comprises a plurality of rods secured at one end to a support liner and supporting at their other ends a heating element assembly which includes a heating element, insulators, retaining or locating pins and a reinforcing member for the heating element. The arrangement may also include means for transferring quenching gases to the interior working space of vacuum furnaces, consisting of an integral manifold or plenum support ring assembly and a plurality of locked in tubes which route the gases directly into the working section of the furnace.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: January 31, 1984
    Assignee: Vac-Aero International Inc.
    Inventor: John H. Hooper
  • Patent number: 4394566
    Abstract: A preheater for a casting ladle includes a stationary horizontal refractory deck having vertical apertures in which are disposed refractory plugs, each of which supports an electrical heating element that depends downwardly from the refractory deck. A lifting table is movable into registration with the set of depending electrical heating elements and is also adapted to support the casting ladle thereon and to raise it into surrounding relation with the electric heating elements that depend from the refractory deck. Individual defective heating elements can be removed and replaced during operation of other operative heating elements.
    Type: Grant
    Filed: October 29, 1981
    Date of Patent: July 19, 1983
    Assignee: Bulten-Kanthal Aktiebolag
    Inventor: Klas B. O. Magnusson
  • Patent number: 4341916
    Abstract: Refractory fiber blanket blocks for electric furnaces having electrical heating elements mounted therewith by supports provide substantially improved insulation capabilities for electric furnaces when attached to the furnace walls. The support elements are in the form of holder members for receiving and support heating elements of the electric furnace and an arcuate spearing member which is capable of insertion into the insulative block at any desired location on an inner surface or hot face without requiring any anchoring structure for heating element support. The arcuate spearing member may take several forms and supports the heating element, engaging only the fiber blanket without anchoring structure for support.
    Type: Grant
    Filed: October 30, 1980
    Date of Patent: July 27, 1982
    Assignee: Manville Service Corporation
    Inventors: Carlisle O. Byrd, Jr., Mack A. Hounsel
  • Patent number: 4331828
    Abstract: A rotatable mounting for the crucible of an electric induction furnace is disclosed. The mounting apparatus includes an access cylinder rotatably mounted within a tubular flange on one wall of the furnace enclosure. Positive and negative slip ring assemblies are mounted at the front of the access cylinder together with a hose reel assembly. The slip ring assemblies each comprise a rotor which is secured to the access cylinder and a stator which is attached to the wall of the enclosure. Flexible electric power leads are attached to terminal blocks at the bottom of each stator and provide both water and electricity to the furnace. Flexible hoses leading from the terminal blocks to the hose reel assembly provide water to the electric heating elements, which are colis made of metal tubing. Electricity is conducted through the slip ring assemblies to power leads which are mounted in the positive and negative rotors.
    Type: Grant
    Filed: January 29, 1981
    Date of Patent: May 25, 1982
    Assignee: Retech, Inc.
    Inventor: Max P. Schlienger