Patents Represented by Attorney, Agent or Law Firm James Riesenfeld
  • Boron containing rapid solidification alloy and method of making the same
    Patent number: 4533389
    Abstract: A homogeneous boron containing alloy is disclosed with a composition which can be essentially represented by the formula of: M.sub.i T.sub.j B.sub.k where M is a metal from the group of nickel, iron, cobalt or a mixture thereof; T is a refractory metal from the group of molybdenum, tungsten, or a mixture thereof; and B is the element boron. The subscripts i, j, k are the respective atomic percent of each of the constituents and vary respectively between about 25 and 98, between about 1 and 40, and between 1 and 35 with the proviso that j>k, and i+j+k=100. By further limitation of the chemistry, it is possible to assure the alloy will age harden.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: August 6, 1985
    Assignee: Allied Corporation
    Inventors: Deepak Kapoor, Chung-Chu Wan, Rong Y. Wang
  • Compacted amorphous ribbon
    Patent number: 4529458
    Abstract: This invention relates to the production of large shapes of metallic glass fabricated from ribbon. The inventive method contemplates placing the ribbon and consolidating the alloy under a pressure or at least 1000 psi at a temperature of between 70% and 90% of the crystallization temperature for a time sufficient to facilitate bonding of the ribbons.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: July 16, 1985
    Assignee: Allied Corporation
    Inventors: Julian H. Kushnick, Dulari L. Sawhney, Robert E. Hathaway
  • Amorphous press formed sections
    Patent number: 4529457
    Abstract: This invention relates to the production of large non-planar shapes of metallic glass fabricated from ribbon. The inventive method contemplates stacking the ribbon. The stacked ribbon is formed and held at temperatures of between 70 and 90% of the crystallization temperature for a time sufficient to facilitate permanent deformation of the stacked ribbons and to bond the ribbons.
    Type: Grant
    Filed: July 19, 1982
    Date of Patent: July 16, 1985
    Assignee: Allied Corporation
    Inventor: Julian H. Kushnick
  • Temperature compensated orientations of berlinite for surface acoustic wave devices
    Patent number: 4525643
    Abstract: A piezoelectric wafer of single crystal berlinite, having a surface defined by an X-axis boule cut at an angle in the range from about 94.degree.-104.degree., provides an improved substrate for a surface acoustic wave device. These cut angles are relatively easy to fabricate, provide excellent temperature compensation in a range from -55.degree. C. to 125.degree. C., and have high piezoelectric coupling coefficient.
    Type: Grant
    Filed: October 28, 1983
    Date of Patent: June 25, 1985
    Assignee: Allied Corporation
    Inventors: Bruce H. Chai, Dana S. Bailey, John F. Vetelino, Donald L. Lee, Jeffrey C. Andle
  • Boron containing rapid solidification alloy and method of making the same
    Patent number: 4523950
    Abstract: A homogeneous boron containing alloy is disclosed with a composition which can be essentially represented by the formula of: M.sub.i T.sub.j B.sub.k where M is a metal from the group of nickel, iron, cobalt or a mixture thereof; T is a refractory metal from the group of molybdenum, tungsten, or a mixture thereof; and B is the element boron. The subscripts i, j, k are the respective atomic percent of each of the constituents and vary respectively between about 25 and 98, between about 1 and 40, and between 1 and 35 with the proviso that j>k, and i+j+k=100. By further limitation of the chemistry, it is possible to assure the alloy will age harden.
    Type: Grant
    Filed: November 9, 1981
    Date of Patent: June 18, 1985
    Assignee: Allied Corporation
    Inventors: Chung-Chu Wan, Rong Y. Wang, Deepak Kapoor
  • Isotope separation by laser excitation of unimolecular reactants
    Patent number: 4519882
    Abstract: A laser isotope separation process is disclosed which comprises selectively exciting to a high vibrational state of the ground electronic state a polyatomic molecule of a gaseous composition which contains a particular isotope of an element bound to hydrogen. The excited molecule undergoes a unimolecular reaction to yield a product which is enriched in the particular isotope. The product may then be conveniently separated from the starting gaseous composition by conventional means and used in scientific research, medicine, agriculture, or power generation.
    Type: Grant
    Filed: June 27, 1979
    Date of Patent: May 28, 1985
    Assignee: Allied Corporation
    Inventors: Kammalathinna V. Reddy, Michael J. Berry
  • Temperature stable magnetic bubble compositions
    Patent number: 4520460
    Abstract: Certain Tm-containing iron garnet compositions provide layers having desirably high values of Curie temperature and magnetic anisotropy and permit the fabrication of devices having 1.2 .mu.m diameter magnetic bubbles. The compositions, based on Tm-substitution on dodecahedral sites of [(La,Bi)(Sm,Eu),(Ca,Sr),R].sub.3 (Fe,Si,Ge).sub.5 O.sub.12, are grown by liquid phase epitaxy onto suitable substrates. Bubble devices that incorporate the layers find applications in high density information storage.
    Type: Grant
    Filed: August 15, 1983
    Date of Patent: May 28, 1985
    Assignee: Allied Corporation
    Inventors: Devlin M. Gualtieri, Paul F. Tumelty
  • Temperature compensated orientation of berlinite for surface acoustic wave devices
    Patent number: 4511817
    Abstract: A piezoelectric wafer of single crystal berlinite, having a surface defined by an X-axis boule cut at about 85.degree., provides a improved substrate for a surface acoustic wave device. The 85.degree. cut angle is relatively easy to fabricate, provides excellent temperature compensation in a range form 20.degree. C. to 100.degree. C., and has high piezoelectric coupling coefficient.
    Type: Grant
    Filed: October 28, 1983
    Date of Patent: April 16, 1985
    Assignee: Allied Corporation
    Inventors: Bruce H. Chai, Dana S. Bailey, John F. Vetelino, Donald L. Lee, Jeffrey C. Andle
  • Method and apparatus for reshaping and polishing an end face of an optical fiber
    Patent number: 4510005
    Abstract: The end face of an optical fiber is urged against the highly polished surface of a disk as a laser beam is directed toward the disk to heat the end face above its softening temperature and cause it to conform to the contour and finish of the highly polished surface. A termination ferrule may be simultaneously mounted on the fiber optic cable with a heat bonding agent, using as a heat source either the laser beam or an auxiliary heat source. A hand-held, gun-type unit with a built-in disk and triggered laser can be used to polish and terminate optical fibers in the field.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: April 9, 1985
    Assignee: Allied Corporation
    Inventor: John P. Nijman
  • Amorphous metal powder for coating substrates
    Patent number: 4503085
    Abstract: The present invention is for a flat B containing amorphous powder based in Fe, Ni, Co or a combination thereof; a coating resulting from deposition of the powder; and a method for depositing the powder.The composition of the powder and the resulting coating consists essentially of the formulation: (Fe,Ni,Co).sub.bal Cr.sub.0-20 (Mn,Mo,W).sub.0-35 (B,Si,C).sub.5-25 (Al,Ti).sub.0-10 where the subscripts are in atomic percent and with the proviso that 4.ltoreq.B.ltoreq.15, and that the balance will exceed 50%.
    Type: Grant
    Filed: February 7, 1983
    Date of Patent: March 5, 1985
    Assignee: Allied Corporation
    Inventors: James Dickson, Louis F. Nienart, David W. Roth
  • Cr-Doped yttrium gallium garnet laser
    Patent number: 4490822
    Abstract: A broadly wavelength-tunable laser is provided which comprises as the laser medium a single crystal of YGG:Cr.sup.3+. The laser may be operated over a broad temperature range from cryogenic temperatures to elevated temperatures. Emission is in a spectral range from red to infrared, and the laser is useful in the fields of defense, communications, isotope separation, photochemistry, etc.
    Type: Grant
    Filed: June 17, 1982
    Date of Patent: December 25, 1984
    Assignee: Allied Corporation
    Inventors: John C. Walling, Michael L. Shand
  • Non plugging falling film plasma reactor
    Patent number: 4489041
    Abstract: An improved apparatus and an associated method for the reduction of low melting point oxides in a falling film plasma reactor is disclosed. The improved torch provides a radiation barrier to avoid premature melting of the reactants that cause clogging of the reactor.
    Type: Grant
    Filed: July 6, 1983
    Date of Patent: December 18, 1984
    Assignee: Allied Corporation
    Inventors: Franklin S. Wong, Clair E. Hildebrand
  • Multistage process for preparing ferroboron
    Patent number: 4486226
    Abstract: A process for preparing ferroboron comprises first heating a mixture of boron oxide or boric acid, iron or iron oxide, carbon, and a carbohydrate to produce a foraminous char. During a subsequent two-stage reduction process in an electric or arc plasma furnace, ferroboron is produced and gaseous boric oxides are evolved. The boron values are captured as they move to the cooler regions of the furnace, resulting in high boron yields. The process is particularly useful in preparing pure and inexpensive raw material for the production of amorphous ferroalloys.
    Type: Grant
    Filed: November 30, 1983
    Date of Patent: December 4, 1984
    Assignee: Allied Corporation
    Inventors: Clair E. Hildebrand, Franklin S. Wong
  • Optical beam concentrator
    Patent number: 4484334
    Abstract: An optical beam concentrator divides and redirects an incident beam to provide uniform irradiation along the length of a narrow rectangular area. The beam concentrator may form a part of an apparatus for laser irradiation of materials. The apparatus comprises a laser, a beam concentrator, and a support for the material being irradiated. Depending on the system parameters, the apparatus is particularly useful for gettering defects in semiconductor device fabrication or other materials processing applications.
    Type: Grant
    Filed: November 17, 1981
    Date of Patent: November 20, 1984
    Assignee: Allied Corporation
    Inventor: Robert J. Pressley
  • Hydrothermal crystal growing process
    Patent number: 4481069
    Abstract: Large single crystals of berlinite are grown onto seed crystals by maintaining the crystals at a fixed elevated temperature in a pressure vessel containing a nutrient of coarse berlinite crystalline powder, held at a fixed lower temperature, and a mixture of hydrochloric and phosphoric acids. Because berlinite shows retrograde solubility in the acid mixture, the nutrient goes into solution, and berlinite deposits on the higher-temperature growing crystal. Large single crystals of alpha-gallium orthophosphate may be grown using the same apparatus and a similar process. The resultant crystals may be cut into wafers useful in surface acoustic wave devices.
    Type: Grant
    Filed: January 6, 1982
    Date of Patent: November 6, 1984
    Assignee: Allied Corporation
    Inventors: Bruce H. Chai, Ernest Buehler, John J. Flynn
  • Optical beam homogenizer
    Patent number: 4475027
    Abstract: An optical beam homogenizer divides and redirects an incident beam to provide uniform irradiation to a plane surface. The beam homogenizer is particularly useful in an apparatus and method for uniform laser irradiation of materials. The apparatus comprises a laser, a beam homogenizer, and a support for the material being irradiated. Depending on the system parameters, the apparatus is useful for metal hardening, semiconductor annealing, or other materials processing applications.
    Type: Grant
    Filed: November 17, 1981
    Date of Patent: October 2, 1984
    Assignee: Allied Corporation
    Inventor: Robert J. Pressley
  • Apparatus for rapid solidification casting of high temperature and reactive metallic alloys
    Patent number: 4471831
    Abstract: An apparatus for rapid solidification casting of molten high temperature and/or reactive metallic alloys has a heat extraction crucible for containing the alloy in liquid form. A nozzle forms an integral part of the crucible and allows for ejection of a stream of molten metal. The heat extracting crucible and nozzle are protected from the molten alloy by a shell of the alloy which has solidified and prevents reaction between the molten metal and the heat extracting crucible.
    Type: Grant
    Filed: March 17, 1983
    Date of Patent: September 18, 1984
    Assignee: Allied Corporation
    Inventor: Ranjan Ray
  • Method for controlling texture level in a moving cavity texturing process
    Patent number: 4462143
    Abstract: A method is described for monitoring and controlling the texture level of a yarn produced in a moving cavity texturing apparatus. The texture level of the yarn is controlled by monitoring fluid pressure in the cavity. The pressure is used as a feedback signal for control of the texture level of the yarn.
    Type: Grant
    Filed: March 12, 1982
    Date of Patent: July 31, 1984
    Assignee: Allied Corporation
    Inventors: Hendrikus J. Oswald, Hsin L. Li, Russell H. Butler
  • Rotating laser beam with coincident gas jet
    Patent number: 4461947
    Abstract: An apparatus provides to a surface a laser beam and gas stream that impinge and rotate in coincidence. The apparatus comprises an optical system (11) to direct the laser beam to a spot in a plane and a stationary gas plenum (16) through which gas passes en route to an outlet nozzle (18) that directs the gas stream to the same spot. The optical system and nozzle rotate in synchronism to cause the spot to trace a circle. The apparatus finds application in materials processing, such as welding and cutting (trepanning).
    Type: Grant
    Filed: August 24, 1982
    Date of Patent: July 24, 1984
    Assignee: Allied Corporation
    Inventor: Kenneth R. Ward
  • Sequential multiphoton excitation method
    Patent number: 4461686
    Abstract: Efficient multiphoton excitation is accomplished by sequentially exciting a polyatomic molecule with one or more wavelengths of infrared laser radiation. Preferably, the delay between successive excitations is longer than the rotational but shorter than the vibrational relaxation time of the molecule. By this method, laser-induced chemical reactions or isotope separation can be achieved with lower fluence and/or higher concentration of molecules than with prior art methods.
    Type: Grant
    Filed: December 3, 1981
    Date of Patent: July 24, 1984
    Assignee: Allied Corporation
    Inventors: Sam A. Tuccio, Donald F. Heller