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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Persson; John A.
Address:
Gibsonia, PA
No. of patents:
12
Patents:












Patent Number Title Of Patent Date Issued
4620308 Arc furnace electrode control October 28, 1986
An arc furnace electrode control includes phase angle measuring devices connected respectively for producing a phase angle signal functionally related to the phase angle between the primary electrode voltage and current. A bias circuit is coupled to the primary of each phase for prod
4575856 Iron free self baking electrode March 11, 1986
An iron free self baking electrode comprises an outer metallic shell, a center core formed of a graphite or prebaked carbon material spaced from the shell and a quantity of a carbonaceous paste which cures into a solid electrode and bonds to the graphite or prebaked carbon core as the co
4490825 Water-cooled electrode December 25, 1984
A water-cooled arc furnace electrode includes a hollow metallic jacket having a cylindrical wall portion supported in spaced relation from a graphite electrode. A shell is spaced from and surrounds the wall portion and has a section extending below the wall portion and upwardly into
4490169 Method for reducing ore December 25, 1984
Low grade ores, such as low-grade manganese ore, are reduced in an electric smelting furnace having two melting zones divided by a barrier. The ore and a small quantity of carbon are melted in the first zone at a temperature sufficient to reduce the iron oxide contained in the ore to
4447906 Arc furnace for producing aluminum May 8, 1984
A method of producing aluminum is carried out in an electric arc furnace having primary and secondary zones separated by a divider constructed to permit the flow of molten but not gaseous products between zones. The method includes providing a charge of carbon into the primary zone c
4385930 Method of producing aluminum May 31, 1983
A method of producing aluminum is carried out in an electric arc furnace having primary and secondary zones separated by a divider constructed to permit the flow of molten but not gaseous products between zones. The method includes providing a charge of carbon into the primary zone c
4353738 Lead smelting method October 12, 1982
A method of smelting lead comprises the steps of containing a quantity of crude lead in an electric arc furnace, disposing a layer of coke or carbon granules over said lead, disposing at least two spaced apart electrodes in contact with said granules, energizing said electrodes for passi
4326093 Electrode contact assembly April 20, 1982
An electrode contact assembly includes spaced-apart U-shaped hollow tubular members each having a contact shoe affixed to each leg. A pressure ring surrounds the contact shoes for forcing the same into pressure engagement with the surface of an electrode. The tubular members are adapted
4307872 Apparatus for reducing ore December 29, 1981
Ore taken from the group consisting of low-grade manganese ore ferromanganese ore and chromium ore is reduced in an electric arc furnace having two melting zones divided by a barrier. Ore and a small quantity of carbon are melted in the first zone and ore and a larger proportion of c
4289537 Method of producing cement September 15, 1981
Tricalcium silicate materials useful in the production of Portland and other cements are prepared by melting a mixture of materials comprising basically line and silica in an electric furnace. The voltage between the electrodes and the conductivity of the melt are controlled so that a
4249952 Method for producing cement clinker from cement kiln waste dust February 10, 1981
A method is disclosed for obtaining useful products from cement kiln waste dust. The dust is collected and added to an electric arc furnace where it is melted. The temperatures required to melt the dust are sufficiently high that alkali sulfates present in the dust are volatilized, leavi
4153812 Bus bar assembly May 8, 1979
Bus bars for connecting arc furnance electrodes to a transformer include pairs of flat, rectangular, hollow, conductive members having side surfaces substantially greater in length than the end surfaces. One side surfaces of the bus bar of each pair are disposed in a parallel, closely










 
 
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