Patents Represented by Attorney James C. Davis, Jr.
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Patent number: 5336350Abstract: A composite is produced by forming tapes comprised of a mixture of infiltration-promoting material and organic binding material, disposing a layer of boron nitride coated fibrous material between at least two of the tapes forming a layered structure, laminating the layered structure, heating the layered structure to remove organic binding material and infiltrating the resulting porous body with a solution of boron and silicon.Type: GrantFiled: October 31, 1989Date of Patent: August 9, 1994Assignee: General Electric CompanyInventor: Raj M. Singh
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Patent number: 5223757Abstract: An dynamoelectric machine is provided having a hollow shaft adapted to receive fluid at one end and to discharge it at the other. The hollow shaft has a stack of laminations mounted thereon. A hollow disk is situated adjacent to and in contact with an axial end of the stack of laminations. The hollow disk includes a generally circular baffle for dividing the hollow disk into two interior sections and to cause the fluid to rotate at the same angular velocity as the hollow disk. The two interior sections are in flow communication with one another of the periphery at the generally circular baffle. The hollow shaft is in flow communication with one of the sections for providing fluid and in flow communication with the other section for removing fluid. A stator surrounds the laminations and is spaced away therefrom.Type: GrantFiled: July 9, 1990Date of Patent: June 29, 1993Assignee: General Electric CompanyInventors: Fred W. Staub, Eike Richter
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Patent number: 5204901Abstract: A public key cryptographic mechanism provides a measurable degree of minimum security, in an ensemble sense, for two Parties, A and B, to establish a commonly held private cryptographic keying variable between them for establishing communications. Both parties randomly generate m-bit vectors vec.sub.-- A and vec.sub.-- B, store the vectors, then copy the vectors and add m-bit vectors containing n ones. The vectors thus modified are exchanged between the parties. Both parties then respectively bit-by-bit combine, by Exclusive-Or logic, their stored m-bit vectors vec.sub.-- A and vec.sub.-- B with a received vector, denoted rec.sub.-- B and rec.sub.-- A, to generate respective vectors W.sub.-- A and W.sub.-- B. Parties A and B then generate all ##EQU1## vectors at a Hamming distance n from W.sub.-- A and W.sub.-- B respectively. These ##EQU2## vectors are each bit-by-bit added, using Exclusive-Or logic, with their encryptions under a publicly known keying variable K.sub.1, forming image vectors.Type: GrantFiled: August 1, 1991Date of Patent: April 20, 1993Assignee: General Electric CompanyInventors: John E. Hershey, Radha Krishna R. Yarlagadda, Lawrence H. Ozarow
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Patent number: 5201939Abstract: A method of altering the composition of an alloy deposited by plasma-spray processing is disclosed. It has been found that the composition of a powder can be altered by selective vaporization of the more volatile components of the alloy. In order to do this, the gas mixture employed in the plasma processing is modified to a composition which imparts a higher superheat to the liquid particles undergoing plasma processing. In this way, an alloy which is out-of-specification can be brought within the specification as to its composition by reducing the more volatile components and accordingly increasing the concentration of the less volatile components.Type: GrantFiled: December 4, 1989Date of Patent: April 13, 1993Assignee: General Electric CompanyInventor: Paul A. Siemers
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Patent number: 5198096Abstract: Method of modifying a polycarbonate surface to improve adhesion of a metal layer thereon and to the articles produced therefrom. The surface is first rendered hydrophilic by an exposure to actinic light such as ultraviolet light. The surface is then impregnated with a diffuser such as hydrochloric acid. The surface after impregnation is etched with a base such as potassium hydroxide and cleaned by oxidizing it with a solution of an oxidizing agent such as potassium permanganate. The cleaned surface is then neutralized by contacting it with a mild reducing agent. The chemically and physically modified surface is electrolessly plated with a primary metal layer. A secondary metal layer is then electrolessly or electrolytically applied on top of the primary metal layer until a metal layer of a desired thickness is attained.Type: GrantFiled: November 28, 1990Date of Patent: March 30, 1993Assignee: General Electric CompanyInventors: Donald F. Foust, Lewis A. Bernstein
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Patent number: 5180694Abstract: Methyl silicone resins are pyrolized in a non-oxidizing atmosphere to form a translucent glass comprised of silicon, oxygen and carbon where silicon atoms are chemically bonded to carbon and oxygen atoms, but there are essentially no chemical bonds between carbon and oxygen atoms. The translucent silicon-oxy-carbide glasses of this invention resist devitrification and decomposition in oxidizing or reducing atmospheres at temperatures of about 1250.degree. C. or greater. Methods for forming silicon-oxy-carbide glass articles are disclosed, along with specific methods for forming silicon-oxy-carbide glass fibres, composites, and cellular structures.Type: GrantFiled: August 30, 1990Date of Patent: January 19, 1993Assignee: General Electric CompanyInventors: Gary M. Renlund, Larry N. Lewis, Judith Stein, Angelo A. Bracco
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Patent number: 5172597Abstract: The detection of sound emitted from a source in a dynamic environment of ambient background noise employs a sufficiently distributed array of sound intensity probes enclosing a sound source is adapted to collect measurements over the same time interval in a non-specific acoustic environment. Each probe in the array is comprised of a pair of mutually spaced microphones generally unmatched in their gain and phase response. A multi-channel fourier spectrum analyzer is used to provide a direct signal processing determination of sound intensity at each probe from pressure measurements taken at each microphone. Their computation is corrected to compensate for gain and phase mismatch between each microphone pair using independently derived probe calibration factors. These correction factors are linearly applied to the sound intensity determination at each probe of the array.Type: GrantFiled: November 14, 1990Date of Patent: December 22, 1992Assignee: General Electric CompanyInventor: Robert A. Hedeen
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Patent number: 5171380Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in weight % ______________________________________ Ni balance Co 8 Cr 13 Mo 3.5 Al 3.5 Ti 2.5 Ta 3.5 Nb 3.5 Zr 0.06 C 0.05 B 0.Type: GrantFiled: June 9, 1989Date of Patent: December 15, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5164724Abstract: Conversion apparatus is used to convert digital data words to a digit-serial data format wherein digit bit-width is optimal for subsequent processing of the digital data words. Optimization is with regard to throughput efficiency, a measure of integrated circuit performance proportional to throughput rate of integrated circuitry and inversely proportional to the area of that integrated circuitry, comprising processing circuitry and attendant conversion circuitry.Type: GrantFiled: July 16, 1990Date of Patent: November 17, 1992Assignee: General Electric CompanyInventors: Richard I. Hartley, Peter F. Corbett, Fathy F. Yassa, Sharbel E. Noujaim
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Patent number: 5164097Abstract: A nozzle assembly design and a method for making the nozzle assembly, as well as a method for controlling a continuous skull nozzle process employing the nozzle assembly are provided wherein the cooling heat transfer coefficient at the nozzle is increased to maintain a steady-state solidified layer of a noncontaminating liner material, the cooling heat transfer coefficient being increased by reducing the contact resistance between a nozzle outer wall member and an inner liner made of the noncontaminating material, the reduction in contact resistance being achieved by shrink-fitting the nozzle outer wall member around the inner liner to increase the contact pressure between those members.Type: GrantFiled: February 1, 1991Date of Patent: November 17, 1992Assignee: General Electric CompanyInventors: Hsin-Pang Wang, Erin M. Perry, Yuan Pang
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Patent number: 5164152Abstract: A method of reducing flow assisted corrosion of a carbon steel component exposed to flowing low-oxygen water is disclosed. The method comprises forming a coating of a platinum group metal on the carbon steel component, and providing a ratio of hydrogen to oxygen of about 1:8 or greater in the water.Type: GrantFiled: August 2, 1991Date of Patent: November 17, 1992Assignee: General Electric CompanyInventors: Young J. Kim, Leonard W. Niedrach
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Patent number: 5162072Abstract: An apparatus and method for control of a shape of a solidification interface in a Czochralski crystal pulling process are provided wherein a bottom heater is disposed below the bottom of the crucible, the bottom heater having a plurality of individually controllable heating elements which are selectively controlled to produce a desired radial temperature distribution across the bottom of the crucible, thereby influencing the flow pattern within the melt.Type: GrantFiled: December 11, 1990Date of Patent: November 10, 1992Assignee: General Electric CompanyInventor: Farzin H. Azad
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Patent number: 5162459Abstract: Polymeric compositions are described which result from blending a mixture comprising: (A) at least one amorphous polycarbonate; (B) at least one cyclic polycarbonate oligomer containing hydroquinone carbonate structural units; and (C) at least one polycarbonate formation catalyst.The polymeric compositions have particular application in the preparation of shaped articles for use in environments characterized by the presence of solvents, solvent vapors, and/or potential for fire conditions. Methods for increasing the solvent and flammability resistance of amorphous polycarbonates are also described.Type: GrantFiled: September 7, 1990Date of Patent: November 10, 1992Assignee: General Electric CompanyInventors: Herman O. Krabbenhoft, Eric J. Pearce
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Patent number: 5162458Abstract: Polymeric compositions are described which result from blending a mixture comprising: (A) at least one amorphous polycarbonate; (B) at least one linear polycarbonate oligomer containing hydroquinone carbonate structural units; and (C) at least one polycarbonate formation catalyst.The polymeric compositions have particular application in the preparation of shaped articles for use in environments characterized by the presence of solvents, solvent vapors, and/or potential for fire conditions. Methods for increasing the solvent and flammability resistance of amorphous polycarbonates are also described.Type: GrantFiled: September 7, 1990Date of Patent: November 10, 1992Assignee: General Electric CompanyInventors: Herman O. Krabbenhoft, Eric J. Pearce, Daniel J. Brunelle, David K. Bonauto
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Patent number: 5159075Abstract: Substituted alkoxy- or alkylthiochlorotriazines wherein the substituents on the alkoxy groups are chlorine, bromine or dialkylphosphato are useful as capping agents for polyphenylene ethers. The capped polyphenylene ethers form copolymers with other polymers containing nucleophilic groups, including polyesters, polyamides and functionalized olefin polymers. Such copolymers serve as compatibilizers in the formation of blends having high impact strength.Type: GrantFiled: February 11, 1991Date of Patent: October 27, 1992Assignee: General Electric CompanyInventors: Otto Phanstiel, Sterling B. Brown
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Patent number: 5159402Abstract: The present monitoring system for monitoring operation of a laser system includes, in one embodiment, respective optical sensors coupled to respective, selected optical components. Each optical sensor, in operation, generates signals indicative of optical signal radial leakage of a respective optical component. When the radial leakage of a respective optical component. When the radial leakage-indicative signal from an optical sensor exceeds a predetermined threshold, operation of the laser system is interrupted.Type: GrantFiled: March 26, 1990Date of Patent: October 27, 1992Assignee: General Electric CompanyInventor: Angel L. Ortiz, Jr.
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Patent number: 5159220Abstract: A rotor assembly for an internal permanent magnet rotor comprises a plurality of interior laminations stacked to form a substantially continuous internal core and a plurality of external laminations stacked to form a substantially continuous external core. A plurality of permanent magnets are positioned between the internal and external cores and folded in the radial plane so as to form a substantially W-shaped arrangement. The magnets may be placed in slots formed through the stacked laminations between the internal and external core sections or the internal and external core sections may be formed as two separate units with the magnets sandwiched therebetween. The core laminations may be strengthened by using nonmagnetic inserts in selected positions which can be welded to the magnetic portions of the laminations. The outer core portion, when separate from the inner core portion, may be held against the inner core portion by bolts through the outer core portion or by a sleeve around the rotor assembly.Type: GrantFiled: June 25, 1990Date of Patent: October 27, 1992Assignee: General Electric CompanyInventor: Gerald B. Kliman
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Patent number: 5157589Abstract: A high density interconnect structure incorporating a plurality of laminated dieletric layers is fabricated using thermoplastic adhesive layers of progressively lower glass transition temperature in order to maintain the stability of the already fabricated structure during the addition of the later laminations. This structure also facilitates the removal of only a portion of the high density interconnect structure where a fault in the system can be corrected in one of the upper layers of the high density interconnect structure.Type: GrantFiled: July 2, 1990Date of Patent: October 20, 1992Assignee: General Electric CompanyInventors: Herbert S. Cole, Jr., James W. Rose, Charles W. Eichelberger, Robert J. Wojnarowski
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Patent number: 5156808Abstract: The present invention provides an alloy having improved crack growth inhibition and having high strength at high temperatures. The composition of the alloy is essentially as follows:______________________________________ Ingredient Concentration in Weight % ______________________________________ Ni balance Co 15 Cr 10 Mo 3 Al 3.35 Ti 5.90 Ta 2.70 Nb 1.35 Zr 0.06 V 1 C 0.05 B 0.03.Type: GrantFiled: September 4, 1990Date of Patent: October 20, 1992Assignee: General Electric CompanyInventor: Michael F. Henry
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Patent number: 5156986Abstract: Positive control over the length of the overlap between the gate electrode and the source and drain electrodes in a thin film transistor is provided by a gate conductor layer comprising two different conductors having differing etching characteristics. As part of the gate conductor pattern definition process, both gate conductors are etched to expose the underlying material and the upper gate conductor layer is etched back to expose the first gate conductor layer in accordance with the desired overlap between the gate electrode and the source and drain electrodes. Thereafter, the remainder of the device is fabricated with the source and drain electrodes self-aligned with respect to the second gate conductor layer using a planarization and non-selective etch method.Type: GrantFiled: March 11, 1991Date of Patent: October 20, 1992Assignee: General Electric CompanyInventors: Ching-Yeu Wei, George E. Possin, Robert F. Kwasnick