Patents Represented by Attorney Sciascia
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Patent number: 4353769Abstract: A polyurethane-quartz laminate suitable for aircraft radomes. Controlled amounts of a mixture of unpolymerized 4,4 diphenyl methane diisocyanate (MDI) and 2,4 toluene diisocyanate (TDI) are polymerized with ethylene glycol at a preselected temperatures and periods to produce a polymeric resin of relatively few nonpolar isocyanate groups. The resin is impregnated and cured in layers of quartz cloth to form a relatively high strength composite or laminate having a low dielectric constant.Type: GrantFiled: October 3, 1980Date of Patent: October 12, 1982Inventor: Henry J. Lee
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Patent number: 4352542Abstract: A connector for joining a fiber optic cable. The connector is constructed th a thin wall tube enclosing strips of a shape memory alloy material. The strips are bent and inserted into the thin wall tube such that an axial cavity is formed between the opposing strips. The axial cavity provides a self-centering mechanism for positioning fiber optic cables along the central axis of the tube. Dimensions of the tube and shape memory alloy strips are chosen such that fiber optic cables inserted into each end of the connector when it is above the transition temperature range of the strips will be forced into coaxial alignment when the connector is cooled to a temperature below the transition range of the strips.Type: GrantFiled: August 26, 1980Date of Patent: October 5, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventor: John E. Tydings
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Patent number: 4352292Abstract: A method and apparatus for measuring the dynamic material constants of rur compounds. The rubber compound is tested in strip form by attaching one end of the strip to an electromechanical shaker while the opposite end of the strip is suspended under constant tension. The electromechanical shaker propagates an acoustic wave in the test strip and a piezoelectric transducer positioned at a first point on the test strip measures the mechanical response of the strip for phase and amplitude. The shaker is programmed to step piecewise over the frequency range from 100 Hz to 40 KHz by a frequency synthesizer. The distance between the shaker and the transducer is changed and data is obtained for a second point on the strip. The test values obtained are used to calculate Young's Modulus and the loss factor for the rubber compound.Type: GrantFiled: July 28, 1980Date of Patent: October 5, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Walter M. Madigosky, Gilbert F. Lee
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Patent number: 4350662Abstract: A carbon dioxide scrubber device for use in a closed or semi-closed breatg gas circuit in an underwater breathing apparatus having a low rate of gas flow includes a canister having a plurality of spaced, coaxial walls that are heated by associated helical water flow heat exchangers and define axial gas flow chambers in which particulate carbon dioxide absorbent material is confined in contact with the heated walls. The heat exchangers are served by common supply and drain lines through water flow controlling connectors having flow dividing and uniting orifices.Type: GrantFiled: January 22, 1981Date of Patent: September 21, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Ronald W. Dowgul, Glendle W. Noble
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Patent number: 4350728Abstract: Interlaminar shear strength of an aircraft wing made of graphite-epoxy laate is significantly increased by embedding thin steel wires in preselected locations of high stress in alternating rows .+-.45.degree. to the plane of the laminate before it is cured. This cross wire reinforcement prevents brittle delamination, arrests propagation of delamination and reduces scatter of interlaminar strength.Type: GrantFiled: October 2, 1980Date of Patent: September 21, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Shih L. Huang, Edward J. McQuillen, Robert J. Richey, Jr.
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Patent number: 4349502Abstract: Fabrication of unoriented phase I crystalline PVF.sub.2 is described wherein commercially available PVF.sub.2 phase II (crystalline form) is placed in a high pressure cell and its temperature is raised slightly over its melting point. The sample is then subjected to abrupt changes in high pressure and the temperature is dropped thereafter. The pressure is then reduced resulting in a product which contains both phase I and phase II forms of PVF.sub.2. The phase I content of the product varies from a few percent and up depending upon the pressure applied during the quenching step.Type: GrantFiled: October 24, 1980Date of Patent: September 14, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Kook D. Pae, Brian A. Newman, Jerry I. Scheinbeim
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Patent number: 4349897Abstract: A bistatic, Doppler sonar that having a plurality of receiver channels det intrusion in an insonified water zone processes return signals in a plurality of discrete up Doppler and down Doppler frequencies to effect short and long term averaging of return energy and short and long term averaging of return energy slope prior to sampling and comparison to generate a multiple bit binary word that is periodically updated and read out in parallel form to detection logic. The detection logic utilizes parallel sets of shift register memories and comparators to detect when rates of occurrence of energy, slope, and stroke conditions exceed predetermined rates, and utilizes a plurality of levels of coincidence gates to detect predetermined combinations of such conditions that will produce an alarm initiating signal.Type: GrantFiled: April 24, 1981Date of Patent: September 14, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Hollis Boehme, Garland R. Barnard, Larry L. Mellenbruch, Danny W. Dickens
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Patent number: 4349824Abstract: A down link UHF antenna is designed which includes four equispaced arms ml plated at an angle on a fiberglass cylinder. A coaxial connector is connected to each of the four arms with the metal plated inner surface as the common ground.Type: GrantFiled: October 1, 1980Date of Patent: September 14, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventor: Eleanor S. Harris
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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: 4348347Abstract: A stretch-staging method is disclosed for straightening continuous fiber columns impregnated within a resin-based tape material to increase the strength and reliability of the material. The tape material is supported about the circumference of a half-cylindrical fixture and separated therefrom by a thin lubricating film to reduce surface friction. Loads of substantially equal weight are longitudinally applied at opposite ends of the tape material about the fixture, and the combination is heated in an oven to an elevated temperature for a predetermined period of time thereby stretching and staging the tape material so that distorted fiber columns are straightened and retained in a straightened condition as the resin is advanced.Type: GrantFiled: April 27, 1981Date of Patent: September 7, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventor: Gary G. Brown
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Patent number: 4347485Abstract: A method of achieving inversion in solid-state rare-earth materials for blue-green laser operation. A XeF excimer laser is used to pump a matching transition in divalent ytterbium in a host material. The host material is co-doped with a trivalent ion such as praseodymium (Pr.sup.3+) so that energy transfer to the trivalent ion will take place. Laser action is then from the Pr.sup.3+ ion. Alternative matching absorption transitions also occur in the trivalent rare-earth ions of Tb, Dy, Ho, and Nd.Type: GrantFiled: May 23, 1979Date of Patent: August 31, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Leon Esterowitz, Roger E. Allen, Melvin R. Kruer, Filbert J. Bartoli
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Patent number: 4342488Abstract: A self-aligning, vibration reducing marine thrust bearing assembly for use ith a propulsion shaft having spaced bearing flanges. The assembly includes a journal bearing sleeve enclosing the shaft and a stationary housing radially spaced from the journal bearing with pivoting means extending therebetween for accommodating any misalignment of the shaft and journal bearing within the housing. An annular fluid containing cavity is formed in the housing adjacent each flange with an annular bearing piston pivotally disposed therein, wherein sealing elements are positioned between the cavity walls and the piston to maintain a fluid seal therebetween. Tapered roller bearings are disposed between each annular bearing piston and each shaft flange raceway.Type: GrantFiled: June 28, 1979Date of Patent: August 3, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Hugh G. Anderson, Philip J. Hatchard
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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: 4339678Abstract: A multistage EHD generator with parallel outputs to produce a usable output urrent. A single injector injects particles or droplets into a fluid flow which traverses a plurality of EHD generator stages in series. At each generator stage there is a means for charging the particles and a means for neutralizing the particles. The outputs between the charging and neutralizing means are connected in parallel to provide a substantial electrical power output.Type: GrantFiled: August 18, 1980Date of Patent: July 13, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Theodore H. Gawain, Oscar Biblarz
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Patent number: 4339683Abstract: A mechanical and electrical connection for a piezoelectric member of polyic material such as polyvinylidene fluoride, and method for forming such a connection. To form the connection, the piezoelectric member is first masked to prevent a preselected portion of its surface from being coated during subsequent coating operations. An electrically conductive member such as a lead wire or a solderable terminal is then attached to the nonmasked area of the piezoelectric member with adhesive such as epoxy. The masked piezoelectric member, the electrically conductive member, and (incidentally) the mask are then coated with a conductive coating such as sputtered gold to electrically connect the conductive member to the piezoelectric member. The mask can now be removed from the piezoelectric member if desired, although it can be left in place as a convenient vise.Type: GrantFiled: February 4, 1980Date of Patent: July 13, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: William R. Scott, Philip Bloomfield, William T. Weist, Karen M. McMahon
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Patent number: 4338466Abstract: Prostaglandin analogs and process for the preparation thereof as precursors or the synthesis of oligomeric mixtures exhibiting biological activity for protection of oxidative phosphorylation of degraded mitochondria. The analogs have the general formula: ##STR1## synthesized by O-alkylating a 2-alkylcyclopentane-1,3-dione to form an enol ether, reacting the ether with CH.sub.2 .dbd.CHMgBr to form a vinyl, oxidizing the vinyl with OsO.sub.4 and NaIO.sub.4 to form an aldehyde, and reacting the aldehyde with a sodium salt of dimethyl (2-oxoalkyl)phosphonate.Type: GrantFiled: April 2, 1981Date of Patent: July 6, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventor: George L. Nelson
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Patent number: 4337527Abstract: An oscillator generates a fixed frequency ultrasonic output signal. After wer amplification this signal drives a transmitting transducer which projects an ultrasonic beam into water. Reflected signals are received by a receiving transducer and AGC preamplified. A chopper multiplies the received signal with the transmitted signal and generates an output signal if a target exists. To determine whether the target is a swimmer, this output signal is band pass filtered and amplified and then fed both to an automatic alarm and to a set of headphones. A human operator listening to the headphone output classifies the target and determines exact bearing.Type: GrantFiled: September 29, 1971Date of Patent: June 29, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Arthur D. Delagrange, Cabell N. Pryor, Jr., Wayne D. Wilson
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Patent number: 4336443Abstract: A modular oven device for baking rewound and varnished electrical components of substantial size includes front and rear oven sections, sized to pass individually through a passageway too narrow to accommodate the component to be baked, and assembled on a base section to define an oven cavity, and a heater/blower section assembled on one oven section. The oven sections are characterized by double, unsulated walls, flanges covering joints, a thermostatic control, and inlet and exhaust air flow regulation.Type: GrantFiled: January 22, 1981Date of Patent: June 22, 1982Inventor: Joseph M. Benedetto
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Patent number: 4336283Abstract: An improved method of manufacturing articles containing carbon fibers when the fibers are temporarily plasticized to render them more flexible thereby permitting tortuous mechanical manipulation of the fibers to be carried out with little or no mechanical damage. The improvement comprises exposing the carbon fibers to agents capable of intercalating single crystals of graphite, such as bromine or iodine monochloride which have the effect of plasticizing the fibers by lowering their tensile modulus. While the fiber yarns are appreciably more flexible in the plasticized state, and have a higher elongation-at-break, on removal of the plasticizer they tend to return to their original state but retain a measurable degree of the shape imparted to them.Type: GrantFiled: August 16, 1976Date of Patent: June 22, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Leighton H. Peebles, Donald R. Uhlmann, Steven B. Warner
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Patent number: 4335433Abstract: In a satellite navigation system for an ocean vessel, a major source of error is unknown ocean currents when the navigation is done by dead-reckoning with respect to the waters. The present method for determining and correcting for ocean navigation error which is caused by unknown ocean currents provides a highly accurate position of the vessel with respect to the earth. The position error reflects not only the difference between a dead-reckoned position and a satellite fix position which up-dates the dead-reckoned position but also accounts for the motion of the vessel due to the ocean currents during the time between the satellite lock-on and the actual error computation and correction.Type: GrantFiled: June 16, 1980Date of Patent: June 15, 1982Assignee: The United States of America as represented by the Secretary of the NavyInventors: Russell H. Bauer, Madeleine Heidkamp
