Patents Represented by Attorney Robert F. Dropkin
  • Patent number: 4115158
    Abstract: A process for producing a phosphorus-bearing soft magnetic material. The process includes the steps of: blending iron powder and ferro-phosphorus powder into a mixture containing from 0.4 to 1.25% phosphorus; pressing said blended mixture into a compact; and sintering said compact in a non-oxidizing atmosphere. The iron and ferro-phosphorus powder respectively have no more than 0.02 and 0.2% calcium. The ferro-phosphorus powder has from 12 to 30% phosphorus.
    Type: Grant
    Filed: October 3, 1977
    Date of Patent: September 19, 1978
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventor: Orville W. Reen
  • Patent number: 4111685
    Abstract: Oxide dispersion-strengthened metal having from 18 to 35% chromium, 3 to 7% aluminum, 0.2 to 3.0% of an oxide dispersoid, 10 to 45% nickel and at least 30% cobalt. The oxide dispersoid has a negative free energy of formation at 1000.degree. C of at least as great as that of aluminum oxide.
    Type: Grant
    Filed: November 4, 1976
    Date of Patent: September 5, 1978
    Assignee: Special Metals Corporation
    Inventor: Sanford Baranow
  • Patent number: 4109502
    Abstract: A container for drawing or ironing dies is particularly useful but is not limited to can making. It includes an outer ring having an inwardly extending flange at one end and a disc secured to its other end so as to provide a peripheral space for receiving at least three segments which are resiliently urged against a die ring. The radial length of the slot is greater than the radial length of the segments so that the die ring can be displaced from the normal axis of the die pack. Means co-axial with the normal axis of the die limit inward movement of the segments.
    Type: Grant
    Filed: August 26, 1977
    Date of Patent: August 29, 1978
    Assignee: Carmet Company
    Inventor: Dennis A. Schaffer
  • Patent number: 4102713
    Abstract: A process for producing electromagnetic silicon steel having a cube-on-edge orientation and a permeability of at least 1870 (G/O.sub.e) at 10 oersteds. The process includes the steps of: preparing a melt of silicon steel containing from 0.02 to 0.06% carbon, from 0.0006 to 0.0080% boron, up to 0.0100% nitrogen, no more than 0.008% aluminum and from 2.5 to 4.0% silicon; casting said steel; hot rolling said steel; cold rolling said steel; decarburizing said steel; applying a refractory oxide coating containing both boron and an oxide less stable than SiO.sub.2 at temperatures up to 2150.degree. F; and final texture annealing said steel.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: July 25, 1978
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventors: Jack W. Shilling, Clarence L. Miller, Jr., Amitava Datta
  • Patent number: 4102677
    Abstract: A hot workable austenitic stainless steel of improved pitting and crevice corrosion resistance to the chloride ion. The steel consists essentialy of, by weight, from 18 to 20% chromium, 11 to 14% nickel, 3 to 4% molybdenum, up to 2% manganese, up to 0.01% sulfur, up to 0.1% of at least one element from the group consisting of cerium, calcium and magnesium, nitrogen from 0.1% up to its solubility limit, up to 0.08% carbon, up to 1% silicon, up to 1% columbium, up to 0.3% vanadium, up to 0.3% titanium, balance essentially iron.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: July 25, 1978
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventor: Harry E. Deverell
  • Patent number: 4099966
    Abstract: A hot workable austenitic stainless steel having superior pitting and crevice corrosion resistance to the chloride ion. The steel consists essentially of, by weight, from 19 to 23% chromium, 5 to 16% nickel, 3 to 5% molybdenum, 2.5 to 15% manganese, up to 0.01% sulfur, up to 0.1% of at least one element from the group consisting of cerium, calcium and magnesium, nitrogen from 0.2% up to its solubility limit, up to 0.1% carbon, up to 1% silicon, up to 3% copper, up to 1% columbium, up to 0.3% vanadium, up to 0.3% titanium, balance essentially iron.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: July 11, 1978
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventors: Joseph A. Chivinsky, Harry E. Deverell
  • Patent number: 4093472
    Abstract: A strip is continuously passed through a molten salt bath in a main tank having a central longitudinal baffle providing passageways at each end thereof. A sink guide roll is provided for the strip at the exit half of the tank. A heating tank is located along one longitudinal side of the main tank at the entry end thereof and has front and rear connecting openings with the main tank. An agitator is positioned at the front end of the heating tank. A forward tank section located along the other side of the tank has a bottom opening connecting therewith. An intermediate tank section has upper and lower compartments, the upper compartment serving as a sludge settling basin. A rear tank section has an agitator therein and is connected to the forward tank section through the lower compartment. Small openings adjacent the top of the upper compartment open into the main tank and to the rear tank section.
    Type: Grant
    Filed: February 17, 1977
    Date of Patent: June 6, 1978
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventors: Frederick S. Lukac, William P. Zbryski
  • Patent number: 4093476
    Abstract: A gamma prime strengthened nickel base alloy characterized by good hot corrosion resistance, strength, creep resistance, phase stability and stress rupture life. The alloy consists essentially of, by weight, from 12.0 to 20.0% chromium, from 4.0 to 7.0% titanium, from 1.2 to 3.5% aluminum, from 12.0 to 20.0% cobalt, from 2.0 to 4.0% molybdenum, from 0.5 to 2.5% tungsten, from 0.031 to 0.048% boron, from 0.005 to 0.15% carbon, up to 0.75% manganese, up to 0.5% silicon, up to 1.5% hafnium, up to 0.1% zirconium, up to 1.0% iron, up to 0.2% of rare earth elements that will not lower the incipient melting temperature below the solvus temperature of the gamma prime present in the alloy, up to 0.1% of elements from the group consisting of magnesium, calcium, strontium and barium, up to 6.0% of elements from the group consisting of rhenium and ruthenium, balance essentially nickel.
    Type: Grant
    Filed: December 22, 1976
    Date of Patent: June 6, 1978
    Assignee: Special Metals Corporation
    Inventor: William J. Boesch
  • Patent number: 4090551
    Abstract: A ceramic refractory mold protection device for an ingot mold having a flat top surface with a hole therethrough includes a shank portion which fits in the hole an integral head portion which is adapted to rest on the flat top surface and cover the impact area onto which steel is teemed. The head portion extends between 1 and 3 inches from the shank and is between 3/4 and 2 inches high. After the steel is poured and the ingot stripped from the mold, the protective device is removed from the mold and replaced by a new one for the next pour.
    Type: Grant
    Filed: January 17, 1977
    Date of Patent: May 23, 1978
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventors: Douglas C. Lee, Leonard P. Ziemkiewicz, Victor P. Ardito, Alex J. Greco
  • Patent number: 4086731
    Abstract: A plate hold-down device for use during the abrasive cutting of plates which includes an expansible and retractable member adapted to be filled with a liquid and placed onto the plate.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: May 2, 1978
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventor: David L. Burk
  • Patent number: 4086972
    Abstract: An assembly for drilling a hole in a roof to a greater depth than the height of the chamber therebelow includes a starter-driver bar having a first end adapted to be driven by a motor and a second end having a female socket therein, a rod extension including a male end shaped to be received in said female socket and a female socket at its other end of the same cross-sectional size and shape as the first named female socket, and a bit having a male shank of the same general cross-sectional shape as said male end. The male shank which is received in the socket has a pair of opposed longitudinal grooves in its outer surface extending from its lower end to a point beyond the socket. The starter-driver bar and rod extensions have axial holes therethrough so that a suction or water can be provided at the lower end of the assembly. When a suction is to be applied the sockets have at least one hole through its wall which is not covered by the drill shank, but which is covered by the male end of the rod extension.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: May 2, 1978
    Assignee: Carmet Company
    Inventors: Lloyd B. Hansen, Eugene R. Smarrella
  • Patent number: 4083734
    Abstract: A gamma prime strengthened nickel base alloy having a 1650.degree. F impact strength of at least 6 ft.-lbs. after 35,000 hours exposure at 1600.degree. F. The alloy consists essentially of, by weight, from 12.0 to 20.0% chromium, from 4.75 to 7.0% titanium, from 1.3 to 3.0% aluminum, from 13.0 to 19.0% cobalt, from 2.0 to 3.5% molybdenum, from 0.5 to 2.5% tungsten, from 0.005 to 0.03% boron, from 0.005 to 0.045% carbon, up to 0.75% manganese, up to 0.08% zirconium, up to 0.5% iron, up to 0.2% of rare earth elements that will not lower the incipient melting temperature below the solvus temperature of the gamma prime present in the alloy, up to 0.02% of elements from the group consisting of magnesium, calcium, strontium and barium, balance essentially nickel.
    Type: Grant
    Filed: June 9, 1976
    Date of Patent: April 11, 1978
    Assignee: Special Metals Corporation
    Inventor: William J. Boesch
  • Patent number: 4078942
    Abstract: Strip is cleaned by passing it through a molten salt bath in a rectangular tank having U-shaped heating tubes arranged horizontally along each longitudinal side of the tank. Agitators positioned within L-shaped ducts at diagonally opposite corners of the tank cause movement of the bath past the heating tubes, thus heating the bath uniformly and keeping it in motion to prevent sludge from settling out. A second tank arranged along one side of the main tank has two spaced apart openings into the main tank and an agitator which causes movement of molten salt therethrough. The second tank also has a settling chamber therein through which molten salt passes slowly so as to cause sludge to settle out.
    Type: Grant
    Filed: January 21, 1977
    Date of Patent: March 14, 1978
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventors: Frank L. Luisi, Philip R. Robinson, Roy C. Bongartz
  • Patent number: 4078952
    Abstract: A process for producing electromagnetic silicon steel having a cube-on-edge orientation and a permeability of at least 1870 (G/O.sub.e) at 10 oersteds. Involved therein are the steps of cold rolling a hot rolled band to final gage without an intermediate anneal between cold rolling passes; and preparing said band from a melt having 0.0006 to 0.0018% boron, and manganese and sulfur contents which produce a manganese to sulfur ratio of at least 1.83 in said band.
    Type: Grant
    Filed: June 17, 1976
    Date of Patent: March 14, 1978
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventor: Frank A. Malagari, Jr.
  • Patent number: 4079312
    Abstract: Continuous testing apparatus for determining the magnetic characteristics of a strip of moving material including a flux inducing and pick-up device to induce a quantity of flux into the material and dual voltage output producing coils for producing different voltages from material having the same magnetic permeability, and circuit means coupled with the dual coils to produce an output voltage which is a characteristic of the ratio of the voltage produced by one of the coils and the difference between the voltages produced by both of the coils. The invention also includes the method of obtaining a profile of the coil of the material throughout the entire length thereof.
    Type: Grant
    Filed: August 17, 1976
    Date of Patent: March 14, 1978
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventors: Merlin L. Osborn, Layton D. Crytzer
  • Patent number: 4073640
    Abstract: Slag which is not electrically conductive when solid or at least at temperatures below 1500.degree. F. is melted by providing a graphite covering on top of the solid slag, contacting the covering material with at least two electrodes in spaced apart relationship, and supplying electric power to the electrodes to cause the graphite to sublime and set a plasma arc of carbon dioxide between the electrodes with resulting initial melting of the slag adjacent the electrodes. This melted slag then provides a conductive electrical path between the electrodes for continued melting of the slag.
    Type: Grant
    Filed: March 9, 1977
    Date of Patent: February 14, 1978
    Assignee: Special Metals Corporation
    Inventor: Ferhun H. Soykan
  • Patent number: 4069008
    Abstract: A steel strip such as stainless steel is passed in uncoiled form through a jet recuperator, an intermediate furnace section, and a main fired furnace section in which a fuel such as natural gas is burned. The exit end of the main furnace section has an opening only slightly greater than the cross-section of the strip. The strip is preheated in the jet recuperator by forcing waste gases from top and bottom waste gas chambers through holes in the bottom and top, respectively, of the waste gas chambers against both sides of the strip. The strip is further heated by the waste gases in the unfired intermediate section and brought to final temperature in the main fired section.
    Type: Grant
    Filed: March 19, 1976
    Date of Patent: January 17, 1978
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventor: William M. Bloom
  • Patent number: 4066521
    Abstract: A process for descaling a metallic body, wherein a heated body is immersed in a bath of a molten oxidizing salt, and subsequently in an electrolyte of an aqueous solution of at least one neutral salt from the group consisting of the chloride, sulfate and nitrate of an alkali metal or ammonium.
    Type: Grant
    Filed: February 9, 1977
    Date of Patent: January 3, 1978
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventors: Donald R. Zaremski, Albert Krepler
  • Patent number: 4060845
    Abstract: This invention is concerned with a portable demagnetizer which includes a demagnetizing head supported within a hand held housing. Also contained within the housing is a variable control for applying voltages of decreasing step-less magnitude to the demagnetizing head; and means are also provided to apply a step-less alternating current power to the demagnetization head while voltages of decreasing magnitude are applied to the demagnetizing head. The housing is provided with a control means on the outside thereof so that the demagnetizer may be hand held and varied at the same time by a single individual user, particularly because of a minimum of parts and the use of step-less decreasing voltage magnitudes and the use of step-less alternating current power, which is applied to the demagnetizing head. Similar results can be achieved by slowly moving the work away from the alternating field.
    Type: Grant
    Filed: March 25, 1976
    Date of Patent: November 29, 1977
    Assignee: The Arnold Engineering Company
    Inventors: Paul E. Bowers, Mukund A. Phadke
  • Patent number: 4060191
    Abstract: A phosphoric acid flux with good fluxing efficiency and high viscosity, and one which is especially suitable for use in the soldering of copper and copper-plated stainless steel. The flux is in the form of a viscous fluid, or a thermally unstable emulsion when the fluid is combined with a pasty vehicle. The viscous fluid contains phosphoric acid and an organic material (molecular weight between 4,000 and 20,000) from the group consisting of polyethers and polyimines or mixtures thereof having an atomic ratio of carbon to ether oxygen plus imine nitrogen between 1.5 and 3.1.
    Type: Grant
    Filed: June 25, 1976
    Date of Patent: November 29, 1977
    Assignee: Allegheny Ludlum Industries, Inc.
    Inventor: Edward G. Choby, Jr.