Patents Represented by Attorney Joseph T. Cohen

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  • Radiation triggered thyristor with light focussing guide
    Patent number: 4167746
    Abstract: A monolithic semiconductor switch for triggering from a light source or from an electrical signal is provided which includes a light sensitive gate region, and one or more amplifying gate thyristor regions adapted to be connected to an electrical triggering source. Where light triggering is desired, the turn on characteristics of the device are improved by providing light focussing on the light sensitive gate area.
    Type: Grant
    Filed: March 3, 1975
    Date of Patent: September 11, 1979
    Assignee: General Electric Company
    Inventor: Herbert F. Storm
  • Process for preparing a polycrystalline diamond body
    Patent number: 4167399
    Abstract: A cavity of predetermined size is formed in a compressed pressure transmitting powder medium, a mass of diamond crystals in contact with a mass of elemental silicon are disposed within the cavity and additional pressure transmitting powder is placed over the cavity and its contents producing a powder-enveloped cavity. Pressure is applied to the powder medium resulting in substantially isostatic pressure being applied to the cavity therein and its contents sufficient to dimensionally stabilize the cavity and its contents. The resulting shaped substantially isostatic system of powder-enveloped diamond and silicon is hot-pressed to liquefy and infiltrate the silicon through the interstices between the diamond crystals producing, upon cooling, an adherently bonded integral body.
    Type: Grant
    Filed: April 10, 1978
    Date of Patent: September 11, 1979
    Assignee: General Electric Company
    Inventors: Minyoung Lee, Laurence E. Szala, Robert C. DeVries
  • Analog charge transfer apparatus
    Patent number: 4165537
    Abstract: Input sampling circuits are described for converting an analog signal into charge samples for charge transfer devices.
    Type: Grant
    Filed: August 16, 1978
    Date of Patent: August 21, 1979
    Assignee: General Electric Company
    Inventors: William E. Engeler, Richard D. Baertsch
  • Acyl capped quinone-coupled polyphenylene oxides
    Patent number: 4165422
    Abstract: New polymers comprising acyl capped quinone-coupled polyphenylene oxides are described. The resulting new polymers have improved color and in combination with styrene resins provide thermoplastic compositions having improved chemical and physical properties.
    Type: Grant
    Filed: May 26, 1977
    Date of Patent: August 21, 1979
    Assignee: General Electric Company
    Inventor: Dwain M. White
  • Reference voltage source with temperature-stable MOSFET amplifier
    Patent number: 4165478
    Abstract: A reference voltage source, relatively insensitive to changes in ambient temperature and supply voltage, utilizes a plurality of charge transfer amplifiers each having a temperature-stable amplification factor determined essentially by the ratio of two capacitances and independent of temperature-related factors. The amplifiers operate to provide a punch-through reference device with a constant current to cause generation of a stable reference voltage.
    Type: Grant
    Filed: September 21, 1977
    Date of Patent: August 21, 1979
    Assignee: General Electric Company
    Inventors: Walter J. Butler, Charles W. Eichelberger
  • Alumina core having a high degree of porosity and crushability characteristics
    Patent number: 4164424
    Abstract: A core for investment casting directionally solidified eutectic and superalloy material consists of alumina which has a porous microstructure in which the grain morphology is characteristic of grains which have undergone vapor phase transport action.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: August 14, 1979
    Assignee: General Electric Company
    Inventors: Frederic J. Klug, Wayne D. Pasco, Svante Prochazka
  • Self-regulating transport mechanism for superconductive rotor refrigerant
    Patent number: 4164126
    Abstract: Cryogenic liquid coolant for cooling the rotor of a superconducting generator is deposited on the inner surface of a rotating conduit extending within the rotor, forming an annulus of liquid surrounding a vapor core. The liquid coolant from the rotating tube is transferred to two radial tubes in the rotor and, upon emerging therefrom, splashes on the surface of a pool of coolant bathing the rotor windings. Evaporated coolant is returned from the rotor in separate streams from the driven end and the collector end, allowing cooling of the driven and collector ends to be equalized by independently controlling flow of the returning streams.
    Type: Grant
    Filed: February 17, 1978
    Date of Patent: August 14, 1979
    Assignee: General Electric Company
    Inventors: Evangelos T. Laskaris, Bruce B. Gamble, Burton D. Hatch
  • Resistor-containing cryogenic current lead
    Patent number: 4164671
    Abstract: Resistors disposed for vaporizing vapor-trap liquid coolant are individually connected in series with each of the high-aspect-ratio current leads connected to a superconductive coil of an intermittently operable electromagnetic machine. The portion of each lead extending from a coolant vapor return duct (through which the leads enter the machine) and terminating within the coil chamber is of hollow structure. The terminal length of each such portion is turned radially outward and its open outer end is submerged in the pool of liquid coolant in the chamber. The vapor traps are individually defined by liquid coolant in the hollow terminal length of each lead. Coolant vaporized in each trap flows in lead-cooling relationship with the corresponding hollow lead portion.
    Type: Grant
    Filed: May 22, 1978
    Date of Patent: August 14, 1979
    Assignee: General Electric Company
    Inventor: Bruce B. Gamble
  • Method for making aromatic cyclic polyformal
    Patent number: 4163833
    Abstract: There is provided, a method for making cyclic poly-formal substantially free of linear polyformal by agitating a plural phase mixture of an aqueous alkali metal salt solution of bisphenol in contact with methylene halide and a phase transfer catalyst. The cyclic polyformal can be used to make wire coating compositions.
    Type: Grant
    Filed: May 15, 1978
    Date of Patent: August 7, 1979
    Assignee: General Electric Company
    Inventor: Donald S. Johnson
  • Solid state neuron
    Patent number: 4163983
    Abstract: A semiconductor neuron comprises a tunnel diode having a region of recrystallized semiconductor material formed in situ in a columnar structure body of semiconductor material by thermal gradient zone melting. Individual electrical leads are affixed to the body and to both opposing faces of the recrystallized region. A voltage pulse applied between one pair of electrical leads on one surface across the P-N junction will propagate at a predetermined rate through the semiconductor body. After a predetermined delay, the applied pulse will appear across the P-N junction thereby mimicking the conducting nerve pulses by a biological nerve cell and its nerve fiber.
    Type: Grant
    Filed: September 28, 1978
    Date of Patent: August 7, 1979
    Assignee: General Electric Company
    Inventors: Harvey E. Cline, Thomas R. Anthony, Ivar Giaever
  • Method for making thermoplastic foams
    Patent number: 4163037
    Abstract: Foamable blends are provided of high performance thermoplastic polymers such as polycarbonates, polyesters, etc., and an effective amount of a dihydrooxadiazinone blowing agent. The blends can be melt extruded into pellets and sheet and converted into thermoplastic foam structures in accordance with conventional injection molding techniques.
    Type: Grant
    Filed: March 15, 1978
    Date of Patent: July 31, 1979
    Assignee: General Electric Company
    Inventor: George E. Niznik
  • Novel polyetheramide-imide phenolic resin blends
    Patent number: 4163030
    Abstract: This invention is concerned with a new class of polyetheramide-imide phenolic resin blends. More particularly, the invention is concerned with polyetheramide-imide phenolic resin blends which exhibit melt viscosities suitable for solventless-dry powder coating and curing of polyether-imide insulating films on various substrates. The polyetheramide-imide phenolic resin blends are also suitable for the manufacture of filaments, fibers, films, molding compounds, coatings, etc.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: July 31, 1979
    Assignee: General Electric Company
    Inventors: Eugene G. Banucci, Edith M. Boldebuck
  • Rare earth metal doped directionally solidified eutectic alloy and superalloy materials
    Patent number: 4162918
    Abstract: Less than 3 weight percent of a rare earth metal is employed in doping a directionally solidified eutectic alloy or a superalloy material to minimize the formation of a metal-ceramic reaction layer during casting and solidification thereof.
    Type: Grant
    Filed: November 2, 1977
    Date of Patent: July 31, 1979
    Assignee: General Electric Company
    Inventor: Irvin C. Huseby
  • Molten salt leach for removal of inorganic cores from directionally solidified eutectic alloy structures
    Patent number: 4162173
    Abstract: Cores made of either Y.sub.2 O.sub.3, Y.sub.3 Al.sub.5 O.sub.12, LaAlO.sub.3, MgAl.sub.2 O.sub.4 or Al.sub.2 O.sub.3 are removed from castings of advanced superalloy materials by immersion in a molten salt bath of either Li.sub.3 AlF.sub.6 or a mixture of CaF.sub.2 -NaF.
    Type: Grant
    Filed: September 19, 1977
    Date of Patent: July 24, 1979
    Assignee: General Electric Company
    Inventors: Ronald H. Arendt, Marcus P. Borom, Irvin C. Huseby, Frederic J. Klug
  • Polyalkylene terephthalate and organopolysiloxane-polycarbonate block copolymer blends
    Patent number: 4161469
    Abstract: A blend comprising a polyalkylene terephthalate resin and an organopolysiloxane-polycarbonate block copolymer having improved impact and heat distortion properties. The polymer blends can be molded or formed into films, sheets, fibers, laminates, or other improved molded articles of manufacture including reinforced articles by conventional techniques.
    Type: Grant
    Filed: January 9, 1978
    Date of Patent: July 17, 1979
    Assignee: General Electric Company
    Inventors: Donald G. LeGrand, Albert F. Yee
  • Method of cationally polymerizing oxirane free materials with group VIa onium salts
    Patent number: 4161405
    Abstract: Cationic polymerization of a variety of organic materials such as vinyl monomers, prepolymers, cyclic ethers, cyclic esters, cyclic sulfides and organosilicon cyclics can be achieved by the use of certain radiation sensitive aromatic onium salts of Group VIa elements. In addition, polymerizable compositions are provided which can be used as coating compounds, molding resins, adhesives, etc.
    Type: Grant
    Filed: August 5, 1977
    Date of Patent: July 17, 1979
    Assignee: General Electric Company
    Inventor: James V. Crivello
  • Radio determination using satellites transmitting timing signals with correction by active range measurement
    Patent number: 4161730
    Abstract: The time-of-arrival of timing signals transmitted by two satellites is measured relative to a crystal clock, and an approximate position fix is computed for the ship or other object being located. Because of clock error the position fixes are displaced along a hyperbolic line of position. A two-way active range measurement through a third satellite or one timing signal satellite enables computation of an independently determined line of position, the true position fix being at its intersection with the hyperbolic line of position. The clock error is corrected and the method of position fixing from two timing satellites is repeated until the clock drift exceeds acceptable limits. A continuous navigation service and also position surveillance are realized.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: July 17, 1979
    Assignee: General Electric Company
    Inventor: Roy E. Anderson
  • Position surveillance using one active ranging satellite and time of arrival of a signal from an independent satellite
    Patent number: 4161734
    Abstract: The position of a ship or other object being located is determined at an earth station using an active ranging satellite and a satellite which transmits time signals. One line of position is determined by two-way active ranging through the first satellite. The other line of position is determined by one-way ranging from the second satellite. The time interval between the time of arrival of the timing signal at the ship and reception of the active ranging signal at the ship is measured and sent back to the earth station with the ship's active ranging response. The position fix is then computed at the earth station.
    Type: Grant
    Filed: October 17, 1977
    Date of Patent: July 17, 1979
    Assignee: General Electric Company
    Inventor: Roy E. Anderson
  • Laminated capacitive touch-pad
    Patent number: 4161766
    Abstract: A laminated capacitive touch-pad having a thin film touch-plate electrode deposited upon a first (exterior) surface of a first, relatively thin dielectric layer and having spaced transmitter and receiver electrodes deposited upon a second surface of the first layer within the outline of and opposite to the touch electrode, with a relatively thick backing layer of dielectric material laminated upon the second surface to provide a total thickness, as measured between the furthest opposed surfaces of the first and second layers, as required for high voltage insulation purposes and to provide additional impact strength. The touch, transmitter and receiver electrodes may be of thin film construction.
    Type: Grant
    Filed: May 23, 1977
    Date of Patent: July 17, 1979
    Assignee: General Electric Company
    Inventors: Donald E. Castleberry, Wesley K. Waldron
  • Photoinitiators
    Patent number: 4161478
    Abstract: Onium salts of Group VIa elements having an MF.sub.6 -anion, where M is selected from P, As and Sb, have been found to be photo active under ultraviolet light. These onium salts can be employed as cationic photoinitiators when used with a variety of organic resins and cyclic organic compounds.
    Type: Grant
    Filed: September 14, 1977
    Date of Patent: July 17, 1979
    Assignee: General Electric Company
    Inventor: James V. Crivello