Patents Represented by Attorney Paul Weinstein

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  • Transformer-driven shield for electromagnetic casting
    Patent number: 4285387
    Abstract: An electromagnetic casting process and apparatus utilizing an active transformer-driven copper shield. The shield is actively driven with a voltage out of phase with the voltage in the containment inductor with the result that a bucking current is produced in the shield which is out of phase with the current induced in the shield by the inductor. An active transformer-driven duplex variable impedance shield is also disclosed.
    Type: Grant
    Filed: January 14, 1980
    Date of Patent: August 25, 1981
    Assignee: Olin Corporation
    Inventors: Peter J. Kindlmann, John C. Yarwood, Gary L. Ungarean, Derek E. Tyler
  • Fail safe heat exchanger
    Patent number: 4275784
    Abstract: A multiple passage metal heat exchanger is disclosed which contains a metal barrier between sets of passageways. The barrier is cathodic to the metal of the heat exchanger and prevents intermixing of different heat transfer fluids due to corrosion.
    Type: Grant
    Filed: March 31, 1980
    Date of Patent: June 30, 1981
    Assignee: Olin Corporation
    Inventors: James M. Popplewell, Sheldon H. Butt
  • Bottom blocks for electromagnetic casting
    Patent number: 4274470
    Abstract: A bottom block for use in electromagnetic casting of metals wherein the block is constructed of a material having a closely matched electrical resistivity to that of the metal to be cast. The block may be provided with a deeply hollowed out central section so that during startup the end of the down spout supplying molten metal may be positioned a substantial distance below the plane of the top surface of the bottom block.
    Type: Grant
    Filed: August 20, 1979
    Date of Patent: June 23, 1981
    Assignee: Olin Corporation
    Inventors: John C. Yarwood, Derek E. Tyler
  • Duflex impedance shield for shape control in electromagnetic casting
    Patent number: 4265294
    Abstract: A duplex impedance shield is disclosed which is used to effect improved shape control in the electromagnetic casting of molten metal or alloy. The shield is provided with a primary loop which substantially surrounds the upper portion of an electromagnetic casting station and a secondary loop attached thereto which serves to enlarge the air gap enclosed by the shield thereby increasing the impedance of the shield. The secondary loop of the shield may be provided with shunt means which can be manipulated to vary the inductance and/or the resistance of the shield thereby varying the impedance of the shield.
    Type: Grant
    Filed: May 30, 1979
    Date of Patent: May 5, 1981
    Assignee: Olin Corporation
    Inventors: Gerhart K. Gaule, John C. Yarwood, Derek E. Tyler, Ik Y. Yun
  • Chromium modified silicon-tin containing copper base alloys
    Patent number: 4264360
    Abstract: A copper base alloy and process of treating same. The alloy consists essentially of: about 1.0 to 4.5% silicon; about 1.0 to 5.0% tin; about 0.01 to 0.45% chromium; and the balance essentially copper. Preferably, the chromium level is less than about 0.12% in order to provide good tool wear characteristics.
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: April 28, 1981
    Assignee: Olin Corporation
    Inventors: Prakash Parikh, Eugene Shapiro
  • Process for coating copper and copper alloy
    Patent number: 4264379
    Abstract: Copper or copper alloy sheet or foil displaying excellent solderability and high resistance to tarnish is prepared by the provision over its surface of a coating containing a copper salt of an organophosphonic acid. To form the coating, the sheet or foil is immersed for a short time in an aqueous solution containing a phosphonic acid, rinsed and dried, the treatment being combined with or preceded by oxidation of the sheet surface.
    Type: Grant
    Filed: January 11, 1980
    Date of Patent: April 28, 1981
    Assignee: Olin Corporation
    Inventor: Elmer J. Caule
  • Electrochemical detinning of copper base alloys
    Patent number: 4264419
    Abstract: A method for electrochemically removing a tin layer from copper or copper alloy substrates without any attack on the substrate is disclosed which permits the simultaneous recovery of pure tin at high efficiency. The process is carried out by achieving effective complexing of tin ions in solution so that a stannous ion activity of greater than 10.sub.-4 gm ions/l is never achieved while conducting the electrochemical detinning potentiostatically at a potential where anodic corrosion of the copper or copper alloy substrate is not possible.
    Type: Grant
    Filed: October 9, 1979
    Date of Patent: April 28, 1981
    Assignee: Olin Corporation
    Inventor: Michael J. Pryor
  • Modified brass alloys with improved stress relaxation resistance
    Patent number: 4259124
    Abstract: An alloy system which exhibits improved resistance to stress relaxation at elevated temperatures utilizes additions of silicon or tin or mixtures of silicon and tin to a copper-zinc base to attain the stress relaxation performance. The composition and processing of this alloy system maintains at least 90% by weight alpha-phase within the alloy.
    Type: Grant
    Filed: October 11, 1979
    Date of Patent: March 31, 1981
    Assignee: Olin Corporation
    Inventors: Warren F. Smith, John M. Vitek, Eugene Shapiro
  • Copper base alloy containing manganese and cobalt
    Patent number: 4249942
    Abstract: A copper base alloy having improved stress relaxation resistance consisting essentially of about 10.0 to 31% zinc; about 1.0 to 5.0% aluminum; about 0.1 to 3.0% cobalt; about 0.5 to 8% manganese; and the balance essentially copper.
    Type: Grant
    Filed: September 11, 1979
    Date of Patent: February 10, 1981
    Assignee: Olin Corporation
    Inventors: Eugene Shapiro, John M. Vitek, Warren F. Smith, Jr.
  • Fail safe heat exchanger
    Patent number: 4246960
    Abstract: A multiple passage metal heat exchanger is disclosed which contains a metal barrier between sets of passageways. The barrier is cathodic to the metal of the heat exchanger and prevents intermixing of different heat transfer fluids due to corrosion.
    Type: Grant
    Filed: March 26, 1979
    Date of Patent: January 27, 1981
    Assignee: Olin Corporation
    Inventors: James M. Popplewell, Sheldon H. Butt
  • Cooperative rolling process and apparatus
    Patent number: 4244203
    Abstract: An apparatus and process for rolling metal strip to provide increased percentage reductions in the thickness of the strip per pass and increased total reduction between anneals. A 4-high rolling mill is modified so that it is back-up roll driven such that the back-up rolls have different peripheral speeds in the same ratio as the desired strip reduction. The strip travels through the mill in a serpentine arrangement to provide three reductions per pass. Forward and back tension are applied to the strip during rolling.
    Type: Grant
    Filed: March 29, 1979
    Date of Patent: January 13, 1981
    Assignee: Olin Corporation
    Inventors: Michael J. Pryor, Joseph Winter
  • Copper base alloy containing manganese
    Patent number: 4242133
    Abstract: A copper base alloy having improved stress relaxation resistance consisting essentially of: about 15.0 to 31% zinc; about 1.0 to 5.0% aluminum; about 1.1 to 8% manganese; and the balance copper.
    Type: Grant
    Filed: September 11, 1979
    Date of Patent: December 30, 1980
    Assignee: Olin Corporation
    Inventors: Eugene Shapiro, John M. Vitek, Warren F. Smith, Jr.
  • Copper base alloy containing manganese and iron
    Patent number: 4242131
    Abstract: A copper base alloy having improved stress relaxation resistance consisting essentially of: about 15.0 to 31% zinc; about 1.0 to 5.0% aluminum; about 0.1 to less than 1% iron; about 1.1 to 8% manganese; and the balance essentially copper.
    Type: Grant
    Filed: September 11, 1979
    Date of Patent: December 30, 1980
    Assignee: Olin Corporation
    Inventors: Eugene Shapiro, John M. Vitek, Warren F. Smith, Jr.
  • Copper base alloy containing manganese and nickle
    Patent number: 4242132
    Abstract: A copper base alloy having improved stress relaxation resistance consisting essentially of: about 15.0 to 31% zinc; about 1.0 to 5.0% aluminum; about 0.1 to less than 1.0% nickel; about 1.1 to 8% manganese; and the balance essentially copper.
    Type: Grant
    Filed: September 11, 1979
    Date of Patent: December 30, 1980
    Assignee: Olin Corporation
    Inventors: Eugene Shapiro, John M. Vitek, Warren F. Smith, Jr.
  • Ingot shape control by dynamic head in electromagnetic casting
    Patent number: 4236570
    Abstract: A method and apparatus is disclosed for electromagnetic casting of metal and alloy ingots of desired shape having portions of small radius of curvature. An open-ended container or hot-top having spaced internal baffles is placed before the electromagnetic induction station of the casting apparatus to provide desired metal flow patterns. Also disclosed is a downspout having nozzle portions which provide preferred directionality to supplied molten metal.
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: December 2, 1980
    Assignee: Olin Corporation
    Inventors: Gerhart K. Gaule, John C. Yarwood, Derek E. Tyler
  • Heat exchange panel
    Patent number: 4235287
    Abstract: A heat exchange panel having a desired system of internal tubular passageways is described, wherein the internal passageways include opposed headers connected by connecting portions of said passageways extending therebetween. The headers are designed to provide uniform fluid distribution and to enable efficient drainage of fluid from the unit, including any entrapped gases.
    Type: Grant
    Filed: May 2, 1975
    Date of Patent: November 25, 1980
    Assignee: Olin Corporation
    Inventors: Charles A. Kleine, Verne L. Middleton
  • Modified brass alloys with improved stress relaxation resistance
    Patent number: 4233068
    Abstract: An alloy system which exhibits improved resistance to stress relaxation at elevated temperatures utilizes additions of tin or silicon, or mixtures of each of these elements, along with magnesium or magnesium plus aluminum to a copper-zinc base to attain the stress relaxation performance. The composition and processing of this alloy system maintains at least 90% by weight alpha-phase within the alloy.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: November 11, 1980
    Assignee: Olin Corporation
    Inventors: Warren F. Smith, Jr., John M. Vitek, Eugene Shapiro
  • Modified brass alloys with improved stress relaxation resistance
    Patent number: 4233069
    Abstract: An alloy system which exhibits improved resistance to stress relaxation at elevated temperatures utilizes additions of magnesium plus aluminum to a copper-zinc base to attain the stress relaxation performance. Processing of this alloy system should be performed so as to maintain at least 90% by weight alpha-phase within the alloy.
    Type: Grant
    Filed: November 5, 1979
    Date of Patent: November 11, 1980
    Assignee: Olin Corporation
    Inventors: Warren F. Smith, Jr., John M. Vitek, Eugene Shapiro
  • Method for the preparation of thixotropic slurries
    Patent number: 4229210
    Abstract: The invention relates to an improved method for the preparation and delivery of semi-solid thixotropic metal slurries for use in metal forming processes such as the rheocast and thixocast processes. The method includes inducing turbulent motion within the metal during solidification by electromagnetic or electrodynamic techniques under controlled temperature conditions so as to produce a highly fluid semi-solid slurry with a degenerate dendritic structure comprising solid spheroids dispersed in liquid. In the method of the preferred embodiment of the present invention, flow of the thixotropic metal slurry from the vibrating chamber is controlled by electromagnetic techniques and may be continuous or semi-continuous.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: October 21, 1980
    Assignee: Olin Corporation
    Inventors: Joseph Winter, Derek E. Tyler, Michael J. Pryor
  • Process for making tube in sheet heat exchangers
    Patent number: 4227391
    Abstract: An apparatus and process for forming an opening in a composite metal panel on an edge of the panel at a position wherein the opening is to be formed and hammered to delineate a bond interface. The opening is formed between the sheets of the panel and inwardly of the edge thereof starting from the delineated bond interface. The opening is adapted to provide a means for communicating a fluid under pressure for inflating tubular passageways in the panel.
    Type: Grant
    Filed: January 29, 1979
    Date of Patent: October 14, 1980
    Assignee: Olin Corporation
    Inventor: Kenneth Belangee