Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7388896 | Induction melter apparatus Apparatus and methods of operation are provided for a cold-crucible-induction melter for vitrifying waste wherein a single induction power supply may be used to effect a selected thermal distribution by independently energizing at least two inductors. Also, a bottom... | 06/17/2008 |
| 7323136 | Containerless mixing of metals and polymers with fullerenes and nanofibers to produce reinforced advanced materials The present invention relates to fullerene, nanotube, or nanofiber filled metals and polymers. This invention stems from a cross-disciplinary combination of electromagnetic and acoustic processing and property enhancement of materials through fullerene or nanofiber ... | 01/29/2008 |
| 6993061 | Operating an induction melter apparatus Apparatus and methods of operation are provided for a cold-crucible-induction melter for vitrifying waste wherein a single induction power supply may be used to effect a selected thermal distribution by independently energizing at least two inductors. Also, a bottom... | 01/31/2006 |
| 6452140 | Floating/melting using dummy micro-gravitational field by magnetic force A substance 6 is located in a gradient magnetic field and held in a levitating state by a magnetic force produced by the gradient magnetic field. The substance 6 as such in the levitating state is heated and melted by ray or heat irradiation or by a resis... | 09/17/2002 |
| 6307875 | Induction 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... | 10/23/2001 |
| 6222167 | Impedance matching apparatus for induction heating type galvanized steel sheet alloying system and method An alloying system for a galvanized steel sheet, the alloying system using an induction heating coil, wherein an impedance matching apparatus is provided between the induction heating coil and a high frequency power source. The impedance matching apparatu... | 04/24/2001 |
| 5993058 | Thermomechanical characterization system using a fast induction heating device A system for thermomechanical characterization of material using an induction heating system capable of reaching a temperature of 3300° C. in not more than 20 seconds. This fast heating device comprises induction coils laid out at least partly around the... | 11/30/1999 |
| 5940427 | Crucible induction furnace with at least two coils connected in parallel to a tuned circuit converter A coreless induction furnace includes a vertical melting crucible defining a melting chamber having upper and lower chamber portions and at least two coils. A first one of the coils is disposed so as to surround the upper chamber portion and a second one ... | 08/17/1999 |
| 5923699 | Induction furnance heating module and gas zone A heating module for use in steel processing is provided. The module includes one or more gas heating zones and one or more induction heating coils intermixed among the gas heating zones. The modules are used to heat steel slabs to a consistent temperatur... | 07/13/1999 |
| 5902508 | Induction heating coil suitable for floating zone processing An induction heating coil used in a floating zone melting method, characterized in that the path of a high-frequency current is controllable in the body surface of the coil and by the use of the coil a more uniform resistivity profile across a diameter is... | 05/11/1999 |
| 5887018 | Longitudinal electromagnetic levitator An electromagnetic levitator is disclosed, comprising: a plurality of longitudinal sections formed from a conducting material and arranged around a longitudinal axis. The longitudinal sections are connected to a power source such that when the levitator i... | 03/23/1999 |
| 5848093 | Fiber-drawing furnace for drawing down an optical-fiber preform into an optical fiber The fiber-drawing furnace includes a graphite tube positioned vertically, heated by induction, and subjected internally to an inert atmosphere, said tube internally defining a fiber-drawing chamber. In the furnace said graphite tube is a double-walled tub... | 12/08/1998 |
| 5550354 | High-frequency induction heating coil A high-frequency induction heating coil is provided which enables a semiconductor single crystal in the process of growth to incorporate impurities uniformly therein, permits ready adjustment of the heat distributing property, and precludes the discharge ... | 08/27/1996 |
| 5528620 | Levitating and melting apparatus and method of operating the same In addition to a first driving device which moves only a lower crucible, and a first control device which controls the first driving device, a second driving device which changes the vertical relative position of an upper crucible and an induction coil, a... | 06/18/1996 |
| 5479436 | Method of heating and melting metal and apparatus for melting metal A metal material such as scraps of metal is directly heated by electromagnetic induction, and the resulting molten metal is fed to a heatup zone where the molten metal is further heated to a required temperature. More specifically, the metal material to b... | 12/26/1995 |
| 5479438 | Apparatus for fusing a solid layer of electrically conductive material In a melting crucible (3) a central bottom portion (27) is formed of a plurality of palisades (5) and is shaped so that the palisades together form a vessel or a pot (7) having a centrally disposed spout or outlet (8). Two independently powered induction ... | 12/26/1995 |
| 5416796 | Float melting apparatus and method employing axially movable crucibles Apparatus to float and melt particularly small pieces of high-melting point metal continuously while making the amount of meltable liquid metal greater than the capacity of a crucible. A conductive crucible having segments includes an upper cylindrical cr... | 05/16/1995 |
| 5394432 | Levitating and fusing device A plurality of segments 12 respectively formed of an electrically insulated conductive material such as copper or the like are disposed inside an induction coil 1 in the peripheral direction of the induction coil 1 to thereby construct a crucible 3. There... | 02/28/1995 |
| 5308594 | Edge-heat-sink technique for zone melting recrystallization of semiconductor-on-insulator films Wafers of silicon-on-insulator (SOI) produced by the zone melting recrystallization technique are known to exhibit warping and edge defects which prohibit their use in automated silicon wafer processing equipment. These deficiencies arise from excess heat... | 05/03/1994 |
| 5241560 | Crucible 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 |
| 5135726 | Vertical gradient freezing apparatus for compound semiconductor single crystal growth A vertical gradient freeze single crystal growing apparatus utilizing a direct monitoring furnace which is possible to obtain rapid high temperature heating and uniform temperature distribution by using direct monitoring furnace as a higher temperature pa... | 08/04/1992 |
| 5134261 | Apparatus and method for controlling gradients in radio frequency heating A composite susceptor for a radio frequency (RF) heated crystal growing furnace has a plurality of stacked electrically insulating and electrically conducting elements about the crucible area so that a proper temperature gradient is established and contro... | 07/28/1992 |
| 5114528 | Edge-defined contact heater apparatus and method for floating zone crystal growth An apparatus for growing a monocrystalline body (30) from a polycrystalline feed rod (22) includes a heater (20) that is positioned to heat a short section of the polycrystalline rod (22) to create a molten zone (34). The heater (20) is formed to include ... | 05/19/1992 |
| 5109389 | Apparatus 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 |
| 5034199 | Zone melt recrystallization apparatus The improved zone-melt recrystallization apparatus is comprised of a port system for providing a thermal barrier between the recrystallization chamber and the loader assembly. A bellows system is used to lift a plurality of pins that support a silicon waf... | 07/23/1991 |
| 5033948 | Induction melting of metals without a crucible The solid metal to be melted is placed on a support, within an induction coil which is adapted to provide a greater electromagnetic force towards the lower portion of the quantity of metal. When energy is provided to the coil, the metal melts from the top... | 07/23/1991 |
| 5003551 | Induction 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 |
| 4942279 | RF induction heating apparatus for floating-zone melting An RF induction heating apparatus for manufacturing single-crystal semiconductors having large diameters using the floating-zone melting process is provided in which a single turn induction heating coil suitable for zone melting and another heating coil s... | 07/17/1990 |
| 4931945 | Method of controlling floating zone A method of controlling a floating zone applied to a crystal manufacturing system based on the FZ method and designed to enable the diameter at the crystallization boundary and the axial length of the floating zone or other similar quantities to desired v... | 06/05/1990 |
| 4900887 | Floating zone drawing circuitry for semiconductor rods For floating zone drawing of semiconductor rods having diameters greater than 100 mm, at the beginning of the zone drawing process, in particular during melting on of the seed crystal to the semiconductor rod to be drawn, a high load change and impedance ... | 02/13/1990 |
| 4876438 | Control of the power to the heater and the speed of movement of a crystal rod by control of the crystal rod diameter An apparatus for use in a crystal manufacturing system based on a floating zone method or Czochralski method, adapted to control a quantity relating to the diameter of a crystal rod at the crystallization boundary, and designed to reduce hunting in the co... | 10/24/1989 |
| 4873063 | Apparatus for zone regrowth of crystal ribbons Apparatus for producing crystalline ribbons of a material from a "crucible-less" configuration of bodies of the material including possible deposition on a substrate. Means for capacitively coupling electromagnetic energy into a source body of material ar... | 10/10/1989 |
| 4866230 | Method of and apparatus for controlling floating zone of semiconductor rod In a method of controlling a floating zone of a semiconductor rod of the present invention shown in FIG. 1, the diameter Ds at a crystallization boundary of a crystal and the axial length of the floating zone are indirectly controlled by contro... | 09/12/1989 |
| 4833287 | Single-turn induction heating coil for floating-zone melting process This invention relates to a single-turn induction heating coil used for floating-zone melting process. According to this invention, both ends of a single-turn coil are crossed each other in a peripheral direction of the coil so as to form an overlap secti... | 05/23/1989 |
| 4797525 | Induction heater for floating zone melting When semiconductor rods during floating zone melting are doped with dopants having a very low distribution coefficient, the non-homogeneous temperature distribution causes a relatively strong non-homogeneous separation of the dopants (striation). The homo... | 01/10/1989 |
| 4752451 | Apparatus for producing a strain-free monocrystal of a crystalline ferroelectric compound The process involves producing a monocrystal from the ferroelectric compound, annealing the monocrystal and cooling the latter in a zero longitudinal temperature gradient. The apparatus comprises means for producing the monocrystal, and heating means for ... | 06/21/1988 |
| 4619811 | Apparatus for growing GaAs single crystal by using floating zone An apparatus for growing a GaAs single crystal by relying on the floating zone technique in a cylinder charged with a GaAs polycrystal and a GaAs single seed crystal, comprising an As container communicating with the interior of the cylinder to supply an ... | 10/28/1986 |
| 4608473 | Modified zirconia induction furnace A high temperature induction furnace (10) for drawing lightguide fiber (52) from a silica preform (44) has an axially located tubular zirconium dioxide susceptor (34) therein. Prior to use, at least a portion of the inside surface of the susceptor (34) is... | 08/26/1986 |
| 4538279 | Induction coil in the form of a pancake coil for crucible-free zone melting A pancake induction heating coil for crucible-free zone melting of semiconductor crystal rods, includes a primary winding surrounding a semiconductor rod to be remelted in the form of a ring through which cooling liquid flows, a secondary winding surround... | 08/27/1985 |
| 4450333 | Zirconia induction furnace A high frequency induction furnace (10) for reflowing a portion of a lightguide preform (44) in order to draw a fiber (52) therefrom. The furnace (10) has a centrally located tubular susceptor (34) therein having a thin coating of the preform material (e.... | 05/22/1984 |
