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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7363812 | Radar level gauge with variable transmission power A pulsed radar level gauge, comprising a transmitter for generating and transmitting a signal in the form of a pulse train, means for receiving pulses reflected in said tank, and to form an analogue tank signal based on these reflections, an analogue to digital conv... | 04/29/2008 |
| 6980580 | Electrode arrangement as substitute bottom for an electrothermic slag smelting furnace The electrode arrangement uses vertically oriented electrodes with side wall contacts for an electrothermic smelting furnace for aluminum production. The side wall contacts are radially moveable into the furnace to compensate for wear on the contacts. The side wall ... | 12/27/2005 |
| 6735237 | Device for producing a glass melt The invention relates to a device for the production of a glass melt from a batch; with a melt tank (1) that has peripheral walls (1.1-1.4) and a bottom (1.5); with a discharge channel (2) which is located under the bottom (1.5) of... | 05/11/2004 |
| 6318127 | Method of glass manufacture involving separate preheating of components Provided herewith is a method for preheating a glass mixture to be fed into a glass furnace. The method comprises separately preheating at least some of the materials which comprise the load, and then subsequently remixing the preheated materials and pass... | 11/20/2001 |
| 6178192 | Raw material heating apparatus A raw-material heating apparatus in which raw-material supplying pipes and exhaust pipes are disposed in a peripheral portion of a furnace cover, a heating space is formed by the furnace cover, a peripheral wall, and a hearth, a raw material which is supp... | 01/23/2001 |
| 6125658 | Glass furnace and installation comprising same The invention relates to the electric melting technique, in which the melting energy is dissipated in the bath of melted glass as a result of the Joule effect by means of electrodes which dip through the surface of the bath. According to the invention, th... | 10/03/2000 |
| 5659564 | Method and apparatus for maintaining a furnace stack The bottoms of exhaust stacks and systems on glass melting furnaces usually collect slag that is produced by volatiles in the exhaust gases condensing out and forming a glassy substance on the cooler walls of the stacks, etc. which then runs down the wall... | 08/19/1997 |
| 5628808 | Glass melter off-gas system Apparatus and method for melting glass in a glass melter in such a way as to reduce deposition of particulates in the off-gas duct. Deposit accumulation is reduced by achieving an off-gas velocity above approximately 15 meters/second and an off-gas temper... | 05/13/1997 |
| 5490162 | Process and device for the continuous treatment of silicon The invention relates to a process for the continuous treatment of silicon in which a slag in a pivotable low-shaft furnace (1) with a discharge pipe (4) reaching the bottom of the furnace tank is taken to a temperature of 1450° to 1800° C. and this sla... | 02/06/1996 |
| 5341394 | Furnace for melting materials with low melting point with improved casting duct The furnace for melting materials with a low melting point with improved casting duct comprises a furnace body which surrounds a crucible for containing the molten material and which is provided with first resistors for heating the crucible, the casting d... | 08/23/1994 |
| 5338329 | Process and device for obtaining mineral fibers For obtaining mineral fibers from a thermoplastic material having a high melting point, and more precisely for the regulation of the flow rate and temperature of the stream of molten material distributed on the fiber-drawing machine, the molten material i... | 08/16/1994 |
| 5332702 | Low sodium zircon refractory and fused silica process A fired, porous, zircon refractory body consisting essentially of zircon and having a sodium ion content, as an impurity, of less than 30 ppm. A furnace for making fused silica constructed with a crown and cup of such zircon refractory, and a method of ma... | 07/26/1994 |
| 5254151 | Glass batch charger having seals which prevents accumulation of batch A batch charger for a molten glass furnace comprising a stationary hopper having an inlet opening at the upper end and an outlet opening at the lower end. A reciprocable charger plate located below the outlet opening of the hopper to supply material from ... | 10/19/1993 |
| 5243621 | Method of feeding glass batch to a glass-melting furnace A method of feeding glass to a glass-melting furnace for making a vitreous material, a heated airstream containing air at a temperature in excess of 1,000° C. is passed down vertical cylinders towards the crown of the glass-melting furnace. Powdered glas... | 09/07/1993 |
| 5218617 | Apparatus for feeding iron-bearing materials to metallurgical furnaces A method and apparatus for feeding iron-bearing particles into a metallurgical furnace such as an electric arc furnace, comprising a vessel for containing a bath of molten iron, having a wall extending above the bath of molten iron, a preferably screw typ... | 06/08/1993 |
| 5134627 | Batch charger for glass furnace A batch charger for feeding raw batch material to a glass making furnace of the type having a reciprocating charger plate positioned under a hopper chute. A pusher bar is supported substantially parallel to the front edge of the charger plate, and rams ar... | 07/28/1992 |
| 5131005 | Melting apparatus having double wall structure A melting apparatus in which a material to be melted is accommodated in a crucible made of platinum or its alloy, and electric current passes through the crucible to generate heat ot melt the material. At least a part of the crucible is formed into a doub... | 07/14/1992 |
| 5112378 | Bottom outlet device for a glass melting furnace A bottom outlet device is provided for a glass melting furnace, with heating of a glass melt being effected to within the temperature range of the electrical conductivity of the melt by way of electrodes disposed in the interior of the furnace and project... | 05/12/1992 |
| 4903277 | Electric melting furnace with partitioned melting cavity for solidifying highly radioactive waste in glass An electric melting furnace for solidifying highly radioactive waste in glass has a melting cavity made of a non-conductive refractory and adapted to melt a raw material consisting of highly radioactive waste and a glass material by passing a current betw... | 02/20/1990 |
| 4895678 | Method for thermal decomposition treatment of radioactive waste A method for thermal decomposition treatment of a radioactive waste uses an apparatus comprising a container for holding molten matter of a radioactive waste containing a sodium compound, a pair of electrodes contacting the molten matter, and a power sour... | 01/23/1990 |
| 4850572 | Process intended to prevent deposition on the walls of metallurgical containers and metallurgical containers suitable for carrying out this process A process intended to prevent the formation of metal deposits on the walls (1) of metallurgical containers in contact with the molten metal bath (12). An improved container for carrying out this process is also described. Formation of deposit can be preve... | 07/25/1989 |
| 4831633 | Glass melting furnace Glass is made from a feed consisting of batch materials and cullet in a furnace that is both electrically and gas fired. A batch-only hopper discharges through a blanket conveyor to a batch melting chamber that is electrically fired and is connected via a... | 05/16/1989 |
| 4782497 | Electric melting furnace for glassifying high-radioactive waste An electric melting furnace for glassifying high-radioactive waste characterized in that, in a furnace for melting glass containing platinum-group elements which has an outlet of glass at the bottom part of a melting tank, the bottom of the furnace surrou... | 11/01/1988 |
| 4627069 | Joule melter for the processing of radioactive wastes The joule melter has an outer cylindrical electrode which forms the outer wall of the melt containment, an inner cylindrical electrode which protrudes upward in the containment and forms the outlet for the melt, thus, also determining the depth of the mel... | 12/02/1986 |
| 4468164 | Method and apparatus for feeding raw material to a furnace The feeding of batch material to a melting furnace is disclosed. The batch materials are choke fed to keep the total batch crust plus molten glass depth constant. The batch level keeps the arc electrodes submerged and helps promote arc stability and melti... | 08/28/1984 |
| 4433421 | Controlled atmosphere melting of molten slag charge Molten slag is fed from a receptacle to an atmosphere-controlled carbon-lined electric furnace through a refractory-lined siphon tube without allowing atmospheric gases to enter the furnace. Siphoning is initiated by reducing the atmospheric pressure with... | 02/21/1984 |
| 4389724 | Atmosphere controlled electric melting A substantially spherically-shaped electric melting furnace includes a carbon-lined crucible. The interior of said crucible is sealed from the atmosphere outside the crucible and a vacuum pump and venturi device control the atmosphere within the crucible ... | 06/21/1983 |
| 4385918 | Method and apparatus for feeding raw material to an arc furnace A method and apparatus for feeding pulverant raw material to an arc furnace having a plurality of arcing locations defined by vertical electrodes. A vertical feed tube gravitationally conveys the raw material to a central location inside the furnace which... | 05/31/1983 |
| 4375449 | Electric furnaces An electric furnace for fusing of fusible metal/non-metal oxide compounds, for example slag, having a side wall of steel, a plurality of electrodes depending into the furnace, a coolant distributing conduit surrounding the furnace near its upper end, and ... | 03/01/1983 |
| 4323383 | Method and apparatus for uniformly heating a glass stream within the feeder of a glass melting furnace A method and a system for uniformly heating a glass stream flowing in the feeder of a glass melting furnace wherein power or energy is supplied through the electrodes immersed in the glass melt and wherein the temperature of the glass stream is continuous... | 04/06/1982 |
| 4312658 | Method of and apparatus for controlling batch thickness and glass level in a glass furnace A method of and apparatus for controlling the thickness of a blanket of batch floating on a body of molten glass in a glass melting furnace comprising feeding batch to the surface of the blanket of batch, sensing the radiation reflected from a sidewall of... | 01/26/1982 |
| 4302623 | Ultrasonic batch sensing apparatus for glass-melting furnaces An apparatus for sensing the level of the glass batch in a glass-melting furnace. The apparatus comprises means for transmitting an ultrasonic signal toward the surface of the batch in the furnace, means for receiving the ultrasonic signal after it has be... | 11/24/1981 |
| 4264351 | Glass melting furnace A glass melting furnace, especially fully electrically heated glass melting furnace, comprising a wall of refractory material, said wall being circular or having the configuration of a regular polygon, and wherein a supporting frame is provided at the ext... | 04/28/1981 |
| 4194077 | Batch sensor for glass-melting furnaces A glass-melting furnace is provided with means for sensing the batch in the furnace. More specifically, the sensor determines the level or height of the batch in the furnace without physical contact therewith and with the aid of this value, the thickness ... | 03/18/1980 |
| 4142880 | Method and apparatus for feeding a glass melting furnace A batch material feeder for an electrically heated open-top refractory furnace, particularly a circular furnace, wherein the feeder includes a trough holding batch material and mounted over the furnace top, there being a rotatable agitator within the trou... | 03/06/1979 |
| 4097259 | Feeder conduits for a glass furnace with heating electrodes A feeder conduit is disclosed for conveying molten glass from a forehearth of a glass furnace to a glass forming machine. The feeder conduit includes an elongated conduit which receives molten glass from the forehearth and delivers the molten glass to an ... | 06/27/1978 |
| 4047920 | Apparatus for charging an electric glass furnace and method of completely distributing glass batch over the surface of molten glass in an electric glass furnace An apparatus for charging an electric glass furnace having a bottom, first and second opposing sidewalls, and first and second opposing end walls. The apparatus includes hoppers for receiving glass batch from a source and for discharging the glass batch i... | 09/13/1977 |
| 4046535 | Glass melter having reflective top wall and method for using same Method of and apparatus for supplying streams of molten glass including: a feeder with a chamber having an opening for supply of glass marbles for conversion to a molten body; a bottom wall for the chamber having orifices for discharging the molten glass ... | 09/06/1977 |
| 4017294 | Furnace outlet A two-stage orifice outlet is provided for an electric furnace. The structure defining the inner orifice adjacent the interior of the furnace through which molten material passes in its initial stages of withdrawal from the furnace is made of a refractory... | 04/12/1977 |
| 4012218 | Method and apparatus for melting glass A glass melting furnace having a melting section and an adjacent refining section. The two sections are interconnected by a step or barrier which reduces the cross-sectional area of the furnace. The refining section has at least one plane of a plurality o... | 03/15/1977 |
