Patents Represented by Attorney Joseph T. Cohen

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  • Critical gas boundary layer Reynolds number for enhanced processing of glassy alloy ribbons
    Patent number: 4144926
    Abstract: A critical gas boundary layer Reynolds number has been defined to indicate conditions under which glassy alloy ribbons with serrated edges and surface perforations result when processing under various gaseous atmospheres and pressures.
    Type: Grant
    Filed: April 17, 1978
    Date of Patent: March 20, 1979
    Assignee: General Electric Company
    Inventor: Howard H. Liebermann
  • Method for improving the response time of a display device utilizing a twisted nematic liquid crystal composition
    Patent number: 4143947
    Abstract: A method for improving the decay time of a display device utilizing a twisted nematic liquid crystal composition by the addition of a controlled amount of optically active material to produce a natural pitch, under field-free conditions, shorter than four times the thickness of the display device cell.
    Type: Grant
    Filed: February 21, 1978
    Date of Patent: March 13, 1979
    Assignee: General Electric Company
    Inventors: Siegfried Aftergut, Herbert S. Cole, Jr.
  • Coal seam sensor
    Patent number: 4143552
    Abstract: The frequency response of the cutting tool of a coal mining machine is monitored at a resonant frequency of the cutting tool, using a vibration transducer mounted on a non-rotating support arm, to detect the difference between coal and rock or other enclosing material. The horizon control sensor maintains the mining machine within the undulating coal seam.
    Type: Grant
    Filed: March 1, 1978
    Date of Patent: March 13, 1979
    Assignee: General Electric Company
    Inventor: David E. Godfrey
  • Dual-slope analog to digital converter
    Patent number: 4144527
    Abstract: A time-independent, dual-slope analog to digital converter is disclosed. During a first integration period, a predetermined number of charge packets having a first polarity and a magnitude proportional to the magnitude of an analog voltage to be converted are applied to a charge storage element. The first integration period is followed by a second integration period during which a second plurality of charge packets are applied to the charge storage element. The second plurality of charge packets each have a polarity opposite to that of the first plurality of charge packets and a predetermined, constant magnitude. The number of second charge packets required to return the charge stored in the charge storage element to its original value is indicative of the magnitude of the analog signals to be converted.
    Type: Grant
    Filed: August 18, 1977
    Date of Patent: March 13, 1979
    Assignee: General Electric Company
    Inventors: Walter J. Butler, Charles M. Puckette
  • Fingerprinting crystals
    Patent number: 4143544
    Abstract: A diamond or cubic boron nitride crystal containing growth discontinuities resulting from changes in the environment of the growing crystal and having at least one smooth outside surface which intersects the growth discontinuities is charged electrostatically, a fine powder is applied to the charged smooth surface and the applied powder produces a pattern on the charged surface which is a delineation of the intersected growth discontinuities.
    Type: Grant
    Filed: June 22, 1977
    Date of Patent: March 13, 1979
    Assignee: General Electric Company
    Inventors: Robert C. DeVries, Roy E. Tuft
  • Method of making homogenous metal oxide varistor powders
    Patent number: 4142996
    Abstract: A method for manufacturing metal oxide varistors with an extremely homogeneous dispersion of metal oxides is disclosed. In accordance with one embodiment of the invention, nitrates of zinc and certain metal additives are heated to form a hydrated solution which is further heated to form a dehydrated melt, which is further heated to form an extremely homogeneous dispersion of the metal oxides. Tin and antimony are added as oxides rather than nitrates. This process eliminates the need for ball milling.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: March 6, 1979
    Assignee: General Electric Company
    Inventors: Joe Wong, Jan W. Szymaszek
  • Liquid-cooled turbine bucket with enhanced heat transfer performance
    Patent number: 4142831
    Abstract: Individual coolant passages in the airfoil portion of a liquid-cooled turbine bucket are each provided with a plurality of inwardly protruding circumferentially-extending crimps or rings located at spaced intervals along each passage, each crimp, protrusion or ring extending along the inner periphery in a plane generally perpendicular to the wall of the coolant passage at that location. The main flow of liquid coolant moving in each such individual passage during turbine operation under the combined influence of centrifugal and Coriolis forces is broken up and dispersed over an enlarged area of the interior of the coolant passage upon encountering the protrusions.
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: March 6, 1979
    Assignee: General Electric Company
    Inventors: James T. Dakin, Kenneth A. Darrow, Myron C. Muth
  • Method of forming a composite body and method of bonding
    Patent number: 4142945
    Abstract: A method is disclosed for forming a composite body which comprises bonding a moderately deformable metallic element to at least a portion of at least one major surface and to an associated portion of the edge surface of a solid ion-conductive electrolyte material element which contains mobile ions of a metal different from the metallic element. A method is disclosed for bonding a composite body to a deformable metallic casing which comprises pressing the sharp edge at the open end of the casing against the composite body while employing an inert atmosphere, elevated temperature and pressure.
    Type: Grant
    Filed: June 22, 1977
    Date of Patent: March 6, 1979
    Assignee: General Electric Company
    Inventors: Bruce S. Dunn, Robert R. Dubin
  • Method of bonding a metallic element to a solid ion-conductive electrolyte material element
    Patent number: 4142946
    Abstract: A method is disclosed for bonding a moderately deformable metallic element to a solid ion-conductive electrolyte material element which contains mobile ions of a metal different from the metallic element. The method includes juxtaposing the elements, and applying an electric potential across the elements to convert a surface portion of the electrolyte material element to an ion-insulating material and to effect bonding between the juxtaposed surfaces.
    Type: Grant
    Filed: June 17, 1977
    Date of Patent: March 6, 1979
    Assignee: General Electric Company
    Inventor: Bruce S. Dunn
  • Method for rapid removal of cores made of .beta.Al.sub.2 O.sub.3 from directionally solidified eutectic and superalloy and superalloy materials
    Patent number: 4141781
    Abstract: Caustic solutions are employed in an autoclave process to rapidly remove cores made of .beta.-Al.sub.2 O.sub.3 from directionally solidified eutectic alloy and superalloy materials.
    Type: Grant
    Filed: October 6, 1977
    Date of Patent: February 27, 1979
    Assignee: General Electric Company
    Inventors: Charles D. Greskovich, Marcus P. Borom
  • Novel polyetherimide-polyester blends
    Patent number: 4141927
    Abstract: This invention is concerned with a new class of polyetherimide-polyester blends. More particularly, the invention is concerned with polyetherimide-polyester blends which exhibit melt viscosities lower than those associated with the polyetherimide component of the blends. The polyetherimide-polyester blends are suitable for the manufacture of filaments, fibers, films, molding compounds, coatings, etc.
    Type: Grant
    Filed: May 22, 1975
    Date of Patent: February 27, 1979
    Assignee: General Electric Company
    Inventors: Dwain M. White, Robert O. Matthews
  • Method of making a shaped silicon carbide-silicon matrix composite and articles made thereby
    Patent number: 4141948
    Abstract: A method is described for making a shaped silicon carbide-silicon matrix composite. A confined carbon fiber preform is infiltrated with sufficient molten silicon metal at a temperature in the range of from about 1400.degree. C. to about 1800.degree. C. in an inert atmosphere or vacuum.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: February 27, 1979
    Assignee: General Electric Company
    Inventors: William Laskow, Charles R. Morelock
  • Process of forming quinone-coupled polyphenylene oxides
    Patent number: 4140675
    Abstract: A process of forming a quinone-coupled polyphenylene oxide is described which comprises contacting a polyphenylene oxide, wherein said contacting is carried out with a quinone in the substantial absence of any monophenol reactant and any active oxidative coupling catalyst system. 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: February 20, 1979
    Assignee: General Electric Company
    Inventor: Dwain M. White
  • Sulfur electrode, sulfur electrode container and methods of manufacture
    Patent number: 4140841
    Abstract: A sulfur electrode is described which includes a sulfur-carbon plug with a central aperture extending partially therethrough, and at least one layer of an electronically insulating plain woven mesh material positioned within the central aperture and having its exterior surface in contiguous relation with the wall of the central aperture. A sulfur electrode container includes the above sulfur electrode positioned within an outer metallic casing which is substantially corrosion resistant to liquid sulfur and polysulfides. Methods are also described for making sulfur electrode containers.
    Type: Grant
    Filed: May 11, 1978
    Date of Patent: February 20, 1979
    Assignee: General Electric Company
    Inventors: Manfred W. Breiter, Randall N. King
  • Process for selective etching of polymeric materials embodying silicones therein
    Patent number: 4140572
    Abstract: Titanium is employed as a masking material for the selective etching of a coating material of a polyimide-silicone copolymer disposed on selective surface areas of electronic devices.
    Type: Grant
    Filed: September 7, 1976
    Date of Patent: February 20, 1979
    Assignee: General Electric Company
    Inventor: Leonard Stein
  • Radiation detector
    Patent number: 4140909
    Abstract: A layer of transparent conductive material insulatingly overlies a major surface of a substrate of semiconductor material to provide a CIS (conductor-insulator-semiconductor) capacitor. A region of opposite conductivity type is provided in the substrate adjacent the major surface of the substrate. The capacitor is biased in accumulation and the region of opposite conductivity type is reversely biased with respect to the substrate. Minority charge carriers generated in the semiconductor substrate underlying the conductive layer in response to applied radiation diffuse to the region of opposite conductivity type and are sensed.
    Type: Grant
    Filed: December 19, 1977
    Date of Patent: February 20, 1979
    Assignee: General Electric Company
    Inventors: Dale M. Brown, Marvin Garfinkel
  • Film-grid composite substrate for electron microscopy
    Patent number: 4139668
    Abstract: A film-grid composite substrate for supporting specimens in electron microscopy comprises a specimen-support grid adapted for electron microscopy and an ultrathin film of a mixture of organopolysiloxane-polycarbonate interpolymer and polyphenylene oxide. Regions of a major surface of the film are in contiguous relationship with a major surface of the grid, while other major surface regions of the film span apertures defined by the grid structure.
    Type: Grant
    Filed: November 17, 1977
    Date of Patent: February 13, 1979
    Assignee: General Electric Company
    Inventor: William J. Ward, III
  • Single phase signal processing system utilizing charge transfer devices
    Patent number: 4139783
    Abstract: In a charge transfer transversal filter a substrate of one conductivity type semiconductor material is provided. A first plurality of electrodes insulatingly overlie the substrate, each split into a first and a second part with a small gap therebetween. A second plurality of electrodes insulatingly overlie the substrate, each spaced between the adjacent electrodes of the first plurality. A first clock line is connected to the first parts of the first plurality of electrodes and a second clock line is connected to the second parts of the first plurality of electrodes. A fixed d-c voltage is applied to the first and second clock lines. A voltage pulsating above and below the fixed d-c voltage is applied to the second plurality of electrodes. Means are provided for introducing packets of charge representing sequential samples of an analog signal into the filter.
    Type: Grant
    Filed: February 16, 1977
    Date of Patent: February 13, 1979
    Assignee: General Electric Company
    Inventor: William E. Engeler
  • Television inspection system
    Patent number: 4139306
    Abstract: A television inspection system for detecting flaws on a cable and the like, without contact, utilizes means for obliquely, evenly illuminating the object; a backing member having the same average reflectivity as the object and video sensor-signal processing means for detecting changes in the reflected illumination to sense flaws upon the object's surface.
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: February 13, 1979
    Assignee: General Electric Company
    Inventor: James F. Norton
  • Cyclic carbonate trimer of 2,2-bis(4-hydroxyphenyl)-1,1-dichloroethylene
    Patent number: 4139687
    Abstract: The cyclic carbonate trimer of 2,2-bis(4-hydroxyphenyl)-1,1-dichloroethylene is provided which can be employed as a flame retardant for a variety of thermoplastic organic polymers, such as high molecular weight bisphenol-A polycarbonate. This cyclic carbonate trimer also can be employed as a precursor for making high molecular weight phenyl dichloroethylene polycarbonate.
    Type: Grant
    Filed: June 9, 1977
    Date of Patent: February 13, 1979
    Assignee: General Electric Company
    Inventor: Keith N. Sannes