Patents Represented by Attorney T. E. McDonnell
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Patent number: 4798085Abstract: A test rig for measuring wear on flexible membrane material used as seal gers on air cushion vehicles includes a pump and nozzle for producing a shallow, high speed water flow and hydraulic actuators for moving the seal fingers into the flow. The fingers are moved into and out of the flow to simulate the effect of the ship crossing waves at high speed. A fan and air plenum inflate the seal fingers in a manner similar to normal operation.Type: GrantFiled: July 29, 1982Date of Patent: January 17, 1989Assignee: The United States of America as represented by the Secretary of the NavyInventors: Alexander Malakhoff, Sydney Davis
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Patent number: 4656918Abstract: An improved electromagnetic induction method and apparatus therefor for simultaneously collapsing and propelling a deformable annular-shaped workpiece of relatively lightweight construction in a direction outwardly of the apparatus and along its axis wherein the apparatus is made up of seven different embodiments for carrying out the method. Each apparatus is generally comprised of a framework. The framework includes at least one pulse coil means; and a power supply circuit is connected to the pulse coil means. Annular-shaped surface portions of various embodiments of the apparatus define part of an aperture or passageway for receiving a workpiece and function to position the workpiece in mutual inductance relation to the coil means.Type: GrantFiled: February 20, 1985Date of Patent: April 14, 1987Assignee: The United States of America as represented by the Secretary of the NavyInventors: Millard F. Rose, Osa E. Fitch
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Patent number: 4622016Abstract: A full or partial tunnel wedge is positioned in the propeller shaft tunnel ft of the propeller on a waterborne craft. The size and angle of the wedge is determined by the characteristics of the particular craft. The wedge converges water flow and increases water pressure aft of the propeller. The higher water pressure increases the propeller thrust and reduces the hull drag of the propeller shaft tunnel thus reducing the shaft horsepower required to maintain a given speed.Type: GrantFiled: November 20, 1980Date of Patent: November 11, 1986Assignee: The United States of America as represented by the Secretary of the NavyInventor: Donald W. Hankley
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Patent number: 4615903Abstract: A method for coating a surface comprises providing an electrostatically charged powder, irradiating the powder with energy until the powder or the surface melts, and allowing the surface to solidify.Type: GrantFiled: July 1, 1985Date of Patent: October 7, 1986Assignee: The United States of America as represented by the Secretary of the NavyInventor: Douglas L. Miller
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Patent number: 4526980Abstract: Tetranitrodibenzo-1,3a,4,6a-tetrazapentalene is prepared from diaminobenzene by reacting diaminobenzene and lead dioxide in ethylacetate to produce diaminoazobenzene, isolating the product by silica-gel elution, reacting diaminoazobenzene with an inorganic azide in a dilute aqueous nitrous acid solution at a temperature not in excess of 10.degree. C. to produce diazidoazobenzene, isolating the product, heating diazidoazobenzene slowly to about 190.degree. C. until nitrogen stops evolving to form dibenzotetrazapentalene, isolating the product, nitrating dibenzotetrazapentalene with concentrated sulfuric acid and forming nitric at a temperature not in excess of about 65.degree. C. to product tetranitrodibenzo-1,3a,4,6a-tetrazapentalene.Type: GrantFiled: July 6, 1983Date of Patent: July 2, 1985Assignee: The United States of America as represented by the Secretary of the NavyInventors: Marguarite S. Chang, Robert R. Orndoff
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Patent number: 4420350Abstract: The inclusion in a double base propellant of a ballistic modifier selected rom the class consisting of copper, lead, tin, and bismuth chelates of a dihydroxybenzophenone or alkoxyhydroxyphenzophenone.Type: GrantFiled: June 2, 1980Date of Patent: December 13, 1983Assignee: The United States of America as represented by the Secretary of the NavyInventors: Albert T. Camp, Elmer R. Csanady
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Patent number: 4388126Abstract: A multi-component propellant charge is disclosed wherein one component is energetic high-strength composite resin, which is plasticized by an energetic plasticizer and supports the other components during the high-acceleration stage of the propellant's performance.Type: GrantFiled: September 22, 1980Date of Patent: June 14, 1983Assignee: The United States of America as represented by the Secretary of the NavyInventors: Craig Johnson, Paul Dendor, Harry L. Hodgkins
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Patent number: 4349396Abstract: A pyrotechnic composition, suitable for metal cutting, comprises an oxidi selected from the class consisting of calcium sulfate hemihydrate, anhydrous calcium sulfate, magnesium monohydrate, anhydrous magnesium sulfate, anhydrous strontium sulfate, and mixtures thereof; a metal fuel, a halopolymeric binder; and sulfur.Type: GrantFiled: September 22, 1980Date of Patent: September 14, 1982Assignee: The United Stated of America as represented by the Secretary of the NavyInventors: Kurt F. Mueller, Marguerite S. Chang, Robert F. Farncomb, Lyle O. Malotky
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Patent number: 4339764Abstract: A high temperature method for the preparation of single and multiple epitaxial layers of single-phase lead sulfide-selenide, [Pb].sub.a [S.sub.x Se.sub.1-x ].sub.1-a wherein x varies between one and zero, inclusive, and a=0.500.+-.0.003, deposited upon substrates of barium fluoride, BaF.sub.2, maintained in near thermodynamic equilibrium with concurrently sublimated lead alloy and chalcogenide sources. During preparation, the substrate is exposed to the vapor emanating from the single chimney of a two-zone, dual-chamber furnace, thereby providing an epilayer of uniform, and predetermined electrical and optical properties.Type: GrantFiled: March 26, 1979Date of Patent: July 13, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventor: Richard B. Schoolar
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Patent number: 4332632Abstract: A solid rocket propellant comprising (1) ammonium perchlorate, (2) alumin (3) poly(1,2-butylene) glycol, (4) the reaction product of propylene oxide and either trimethylolpropane, hexanetriol or mixtures thereof, (5) 2,3-dihydroxypropyl bis(2-cyanoethyl) amine, (6) hexamethylene diisocyanate, (7) copper chromite, (8) a carboxylic acid ester of either a diol and a monocarboxylic acid or a dicarboxylic acid and a monofunctional alcohol, and (9) sulfur and optionally containing (10) a metal acetylacetonate, (11) 2,4-pentanedione and (12) liquid silicon oil.Type: GrantFiled: July 6, 1971Date of Patent: June 1, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: John A. Conyers, Adolph E. Oberth, George M. Santerre
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Patent number: 4321220Abstract: A method for strengthening a propellant charge by incorporating a support ructure in the propellant charge comprises slowly traversing a flexible perforated material through a propellant lacquer until the desired loading is obtained. Reinforcement by this technique makes possible the use of a double base propellant in high-thrust, short-burning applications.Type: GrantFiled: March 7, 1980Date of Patent: March 23, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventor: Albert T. Camp
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Patent number: 4321217Abstract: Di-alkylated phosphazene oligomers of the general formula: (NP(X.sub.2))..n NPRR' wherein X represents chloride, bromide, or iodide, R and R' represent a linear or branched, saturated or unsaturated hydrocarbon and n represents an integer from 2 to 8, are prepared by reacting, in a nonoxidizing atmosphere, a perhalopolyphosphazene, a Grignard reagent and a cuprous complex in solution, followed by the addition of alkyl iodide or an activated alkyl halide. Polymers, useful as high-temperature elastomers, are prepared from the above oligomers by heating them at a temperature from about 200.degree. C. to about 300.degree. C., followed by a reaction with an amine, metal alkoxide, or a metal aryloxide at a temperature from 20.degree. C. to 200.degree. C.Type: GrantFiled: June 5, 1980Date of Patent: March 23, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Harry R. Allcock, Paul J. Harris
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Patent number: 4315830Abstract: A method for altering the characteristics of liquid telechelic polymers by means of reducing the reactive group content and adjusting the viscosity of a given liquid telechelic polymer. This is accomplished by means of a two stage process which comprises reacting some of the polymer's available reactive groups with a difunctional reactant and adding a diluent to produce a final composition of desired viscosity and reactive group content.Type: GrantFiled: January 19, 1972Date of Patent: February 16, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: David M. French, J. T. L. Rosborough, Clyde J. Swedenberg
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Patent number: 4312114Abstract: A thin-film single-crystal infrared detector exhibiting an increased frequency of response. A closed transverse junction, formed by diffusing a central electrode of an impurity rich metal into a lead-salt film epitaxially grown on an insulating substrate, provides an effective optical area in excess of the junction surface. An ohmic contact is spaced apart from the central electrode. Junction capacitance, a limitation upon the electrical response, is diminished by the detector geometry while detectivity is enhanced. In an alternative embodiment the detector may be segmented to provide directional detection.Type: GrantFiled: February 28, 1979Date of Patent: January 26, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventor: Richard B. Schoolar
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Patent number: 4307035Abstract: An improved method of synthesizing bisorthodinitriles having the formula: ##STR1## where R is an aliphatic or aromatic radical, which involves dissolving the eactants in a dipolar aprotic solvent such as dimethylformamide, and heating the mixture to reflux until the completion of the reaction. The usage of such solvents permits the reaction to be completed at least ten times as fast as the prior-art method, while the volume of solvent used is also reduced by a factor of ten.Type: GrantFiled: August 5, 1980Date of Patent: December 22, 1981Assignee: The United States of America as represented by the Secretary of the NavyInventors: Carl J. Garvin, Teddy M. Keller
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Patent number: 4304719Abstract: An iodine-doped polyfluorometallophthalocyanine having the repeating unit [(PcMF) (I).sub.x ] wherein Pc represents a phthalocyanine moiety, M represents a III-A metal selected from the class consisting of aluminum and gallium, and x is from about 0.01 to about 3.4 if M is aluminum and x is from about 0.01 to about 2.3 if M is gallium.Type: GrantFiled: January 23, 1981Date of Patent: December 8, 1981Assignee: The United States of America as represented by the Secretary of the NavyInventors: Kenneth J. Wynne, Paul Kuznesof, Ronald Nohr, Malcolm Kenney
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Patent number: 4304870Abstract: A tough, ablative-resistant, dielectric ceramic material is constructed using powder metallurgy techniques. The composite comprises a boron nitride particulate phase immersed in an Al.sub.2 O.sub.3 matrix. The boron nitride particles are preferably 3-5 microns in size, and create the capability of sustaining thermal strains without generating the thermal stresses that lead to material failure. The composite displays superior mechanical strength characteristics.Type: GrantFiled: February 20, 1980Date of Patent: December 8, 1981Assignee: The United States of America as represented by the Secretary of the NavyInventors: Roy W. Rice, William J. McDonough, Stephen W. Freiman, John J. Mecholsky, Jr.
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Patent number: H167Abstract: An improved multipurpose projectile obturator of composite, frangible conuction where the obturator preferably forms part of a projectile that is launched from an upstanding tube. The tube interior is provided with an alternating series of helically arranged groove and land means. A projectile at its propellant end is provided with an annular shoulder that faces in a direction toward the propellant end. An obturator is generally made up of an elastomeric band of a suitable grade of rubber. The band in being placed about the projectile surface and against the shoulder is positively retained as the projectile is inserted in the tube and launched therefrom. The outer periphery of the band has an annular groove for receiving a ring-like element. This element is preferably of three-ply construction and is also preferably made up of two half sections that are suitably bonded to the groove about the band periphery.Type: GrantFiled: April 18, 1986Date of Patent: December 2, 1986Assignee: The United States of America as represented by the Secretary of the NavyInventors: James J. Forster, Chester J. Kobialka, Sung Cho
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Patent number: H866Abstract: Improved shaped charge assembly of relative lightweight and sealable consction and composed of nonmetallic and nonmagnetic materials that can be used for selectively destroying or disarming a variety of targets. The assembly is generally made up of casing means of tubular-like configuration, jet-forming linear means of conical shape and shaped charge body means. The liner means is interposed between the ends of the casing means where the charge body means is interposed between the casing means and the liner means at one end of the casing means. Depending upon the manner in which the assembly is to be used, at least the one end of the casing means is capped. Suitable plastic materials for use in the liner means have been found to be either polyethylene or polypropylene, having an ultra-high molecular weight.Type: GrantFiled: July 17, 1986Date of Patent: January 1, 1991Assignee: The United States of America as represented by the Secretary of the NavyInventors: Ernest C. Faccini, Felipe A. Garcia
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Patent number: H1235Abstract: Improved armor-piercing projectile of either caliber or saboted, subcaliber esign for effectively penetrating and destroying a fast moving, armored target. The improved projectile is generally comprised of a dome-shaped nose, a fragmentable hollow body of thimble-like configuration, and an integrated base-plug and fuse device. The hollow body is advantageously made up of a heavy metal, preferably either a tungsten alloy or depleted uranium, having a predetermined density of at least eleven grams per cubic centimeter (11.0 gm/cc). The interior of the hollow body is filled with a suitable high energy explosive material. The improved projectile, by reason of its hollow body, not only exhibits an improved ballistic coefficient as compared to previous projectile designs, but also maintains a substantially more uniform velocity throughout its effective range so as to strike a target in shorter time and with greater momentum.Type: GrantFiled: June 18, 1986Date of Patent: October 5, 1993Assignee: The United States of America as represented by the Secretary of the NavyInventor: Michael C. Canaday