Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7147823 | High temperature cooling system and method A method for cooling a heat source, a method for preventing chemical interaction between a vessel and a cooling composition therein, and a cooling system. The method for cooling employs a containment vessel with an oxidizable interior wall. The interior wall is oxid... | 12/12/2006 |
| 6857962 | Blind threaded fastener forming technique A simplified method for producing internally threaded blind fasteners includes cold forming of the thin deformable walls of the fastener into bowed out sections by reverse extrusion to form deep grooves, and subsequent further cold forming to increase the diameter o... | 02/22/2005 |
| 6800146 | Magnetic circuit member A magnetic circuit member contains a matrix portion including iron and silicon; and graphite particles in the matrix. Each of the graphite particles has either a spherical shape or a compact vermicular shape. The inclusion of graphite particles having a relatively l... | 10/05/2004 |
| 6793707 | Inoculation filter A method for inoculating molten iron. The method comprises passing the molten iron through a filter assembly at an approach velocity of about 1 to about 60 cm/sec. The filter assembly comprises a filter element and an inoculation pellet in contact with the filter el... | 09/21/2004 |
| 6328783 | Producing iron from solid iron carbide A method of producing iron from iron carbide is disclosed. Solid iron carbide is injected into a molten bath comprising molten iron and slag and dissolves in the molten bath. An oxygen-containing gas is injected into a gas space above the surface of the m... | 12/11/2001 |
| 6210460 | Strontium-aluminum intermetallic alloy granules Compositions suitable for use as an inoculant for cast iron. The composition includes granules of intermetallic alloys selected from Al4 Sr, Al2 Sr, and AlSr. The composition consists essentially of 40 to 81 percent strontium by weig... | 04/03/2001 |
| 6197088 | Producing liquid iron having a low sulfur content A method of liquid iron production using high sulfur fuels is provided in which the level of sulfur in the iron is maintained below 0.1%. The low sulfur content is achieved even in the presence of high sulfur concentrations in the reducing gases and witho... | 03/06/2001 |
| 6177045 | Composition and method for inoculating low sulphur grey iron A composition for inoculating grey iron, particularly low sulphur grey iron, comprises by weight: rare earth 1.0-4.0%, preferably 1.5-2.5%; strontium 0.5-1.5%, preferably 0.7-1.0%; calcium 1.5% maximum, preferably 0.5% maximum; aluminum 2.0% maximum, pref... | 01/23/2001 |
| 5639420 | Method of manufacturing compacted graphite cast iron A method of manufacturing compacted graphite cast iron, in which graphite modifying alloying agents, in the form of a so-called treatment alloy, are added to low-sulphurous molten cast iron. The treatment alloy is added to the molten iron by being sprayed... | 06/17/1997 |
| 5634960 | Scrap melting in a submerged arc furnace The process feeds a mixture of scrap metal, quartzite, carbonaceous material and wood chips to a submerged arc furnace to make a base iron suitable for iron foundry purposes. The mixture contains 1 to 20% quartzite, 5 to 15% carbonaceous material, 0 to 10... | 06/03/1997 |
| 5224985 | Process and apparatus for the melting of metals in the cupola furnace operated without coke The improved method of melting a metal, especially cast iron, in a cokeless cupola furnace includes the step of injecting at least one case product quality improving and stabilizing substance into a space between the grate and the burners. The quality imp... | 07/06/1993 |
| 4970051 | Process for the introduction of nitrogen into cast iron The present invention provides an agent for the introduction of nitrogen into cast iron, wherein it contains or consists of at least 50% by weight of at least one nitrogen-containing compound with an N--C--N structure and/or a mixture of calcium cyanamide... | 11/13/1990 |
| 4889687 | Nodular cast iron having a high impact strength and process of treating the same Nodular cast iron having favorable mechanical properties, in particular a high impact strength at low temperatures, comprising: from 3.0 to 4.0% of carbon; from 1.5 to 2.3% of silicon; less than 0.3% of manganese; not more than 0.03% of phosphorus; less t... | 12/26/1989 |
| 4686081 | Method for addition of low-melting point metal A method of adding a low-melting point metal (e.g. Pb or Bi) to liquid steel for producing a free-cutting steel in a consistent manner and in high yield of addition is disclosed. In accordance with the method, at least one member selected from said low-me... | 08/11/1987 |
| 4619696 | Additive for metallurgical liquids, and method and device for the preparation thereof An additive for metallurgical liquids is disclosed which consists of an alloy formed by admission of one or more gas phase solutes into one or more liquid phase solvents. The solvent is a substance with semiconductor characteristics, and is selected from ... | 10/28/1986 |
| 4572818 | Process for purifying metal compositions Purified metal compositions and metal compositions free of secondary phase material are produced by heating a metal alloy from the nonequilibrium solidus temperature while subjecting the liquid-solid mixture to high pressure and forcing the liquid through... | 02/25/1986 |
| 4560409 | Metal bearing graphitic carbons This invention relates to the production of a unique class of granular graphitic carbon materials containing metallic elements dispersed throughout the graphitic structure. More specifically, the unique class of products contain elements that enhance the ... | 12/24/1985 |
| 4537629 | Method for obtaining high purity ductile iron A method for making high quality liquid iron with substantially no residual chemical elements and a controlled content of carbon, manganese, phosphorous, sulfur and silicon in the final metal. Sponge iron, as raw material, is melted in a vessel or convert... | 08/27/1985 |
| 4517019 | Method for continuously treating molten metal Method and apparatus for continuously treating a mass of molten metal with a determinate treating agent, wherein the treating agent is continuously introduced in a treating vessel through a supply passage formed through the wall of the vessel while the mo... | 05/14/1985 |
| 4517018 | Cast iron alloy and method for producing same A composite cast iron alloy used as a material for nonferrous metal casting equipment. The raw materials for the composite cast iron alloy include iron, calcium-containing substances, coke, titanium compounds, silica, compounds containing graphite stabili... | 05/14/1985 |
| 4401469 | Manufacturing cast iron with pre-reduced iron ore pellets Cast iron having more regular and uniform free graphite particle shape and distribution is more reliably produced by using pre-reduced iron pellets as a major component of the melting stock. Cast iron made in this way may be advantageously used to form in... | 08/30/1983 |
| 4298377 | Vortex reactor and method for adding solids to molten metal therewith Method and apparatus for adding solids to molten metal by continuously feeding both the solids and the metal into a vortex forming chamber from which the mixture is discharged at the core of the vortex as a free-falling, hollow-centered stream.... | 11/03/1981 |
| 4194901 | Process for producing graphite agglomerates, and products obtained by it A process for producing graphitic agglomerates, comprising the steps of: ing together in a suitable mixer a very fine graphitic powder, a coal such as anthracite, pitcoal, coke etc., and a binder such as coal tar pitch, starch, lignan and its derivatives... | 03/25/1980 |
| 4110108 | Method of producing cast iron A charge of iron-containing metallic substance is melted in a melting vessel, and the molten metallic substance is passed through a body of carbonaceous material contained in a treating container for the metallic substance to be enriched with carbon. The ... | 08/29/1978 |
| 4088974 | Digital device for automatically checking carbon content in metal with reference to temperature stops on cooling curve According to the invention, the proposed digital device for automatically checking the carbon content in a metal with reference to the temperature stops on the cooling curves comprises a converter which converts the actual temperature of the metal into a ... | 05/09/1978 |
| 4008604 | Determination of carbon analysis in irons A new, accurate method for the determination of percent total carbon in a molten hypoeutectic or hypereutectic iron is disclosed. It has been found that percent total carbon content of a molten iron is related to a straight-line function of the difference... | 02/22/1977 |
| 3975191 | Method of producing cast iron A method of producing cast iron wherein kish is added to either the molten iron or to the metal charge. Kish is graphite which floats to the surface of molten iron from a blast furnace. Each kish graphite flake has a very stable nucleus, predominately man... | 08/17/1976 |
| 3942977 | Process for making iron or steel utilizing lithium containing material as auxiliary slag formers A process for the manufacture of iron or steel utilizing lime as a flux improved through use of a lithium containing material as an auxiliary flux.... | 03/09/1976 |
