Patents Represented by Attorney Paul A. Gottlieb
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Patent number: 4634986Abstract: A logarithmic amplifier circuit provides pole-zero compensation for improved stability and response time over 6-8 decades of input signal frequency. The amplifier circuit includes a first operational amplifier with a first feedback loop which includes a second, inverting operational amplifier in a second feedback loop. The compensated output signal is provided by the second operational amplifier with the log elements, i.e., resistors, and the compensating capacitors in each of the feedback loops having equal values so that each break point or pole is offset by a compensating break point or zero.Type: GrantFiled: February 8, 1985Date of Patent: January 6, 1987Assignee: The United States of America as represented by the United States Department of EnergyInventor: William Brookshier
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Patent number: 4633523Abstract: A communications circuit for optically transmitting analog data signals free of excessive ripple, while having rapid response time. The invention is further characterized by being adapted to provide an immediate indication of the failure of the optical transmission link of the circuit. Commercially available voltage to frequency converter chips are used in conjunction with suitable wiring arrays and in combination with readily available indicator means for constructing the communication circuit of the invention. A V/F converter in the communications circuit is coupled to an offset adjustment means to cause the converter to continuously produce a string of output voltage pulses having a frequency of about 1 Khz responsive to the input analog signal to the converter being zero.Type: GrantFiled: February 1, 1984Date of Patent: December 30, 1986Assignee: The United States of America as represented by the United States Department of EnergyInventor: Richard L. Witkover
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Patent number: 4626400Abstract: An arrangement is provided for controlling neutron albedo in toroidal fusion devices having inboard and outboard vacuum vessel walls for containment of the neutrons of a fusion plasma. Neutron albedo material is disposed immediately adjacent the inboard wall, and is movable, preferably in vertical directions, so as to be brought into and out of neutron modifying communication with the fusion neutrons. Neutron albedo material preferably comprises a liquid form, but may also take pebble, stringer and curtain-like forms. A neutron flux valve, rotatable about a vertical axis is also disclosed.Type: GrantFiled: June 1, 1983Date of Patent: December 2, 1986Assignee: The United States of America as represented by the United States Department of EnergyInventors: Daniel L. Jassby, Bradley J. Micklich
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Patent number: 4615861Abstract: Apparatus and method of the invention maintain a plasma current with an oscillatory nonohmic current drive. Each cycle of operation has a generation period in which current driving energy is applied to the plasma, and a relaxation period in which current driving energy is removed. Plasma parameters, such as plasma temperature or plasma average ionic charge state, are modified during the generation period so as to oscillate plasma resistivity in synchronism with the application of current driving energy. The invention improves overall current drive efficiencies.Type: GrantFiled: March 22, 1983Date of Patent: October 7, 1986Assignee: The United States of America as represented by the United States Department of EnergyInventor: Nathaniel J. Fisch
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Patent number: 4604052Abstract: A coal-water mixture (CWM) burner includes a conically shaped rotating cup into which fuel comprised of coal particles suspended in a slurry is introduced via a first, elongated inner tube coupled to a narrow first end portion of the cup. A second, elongated outer tube is coaxially positioned about the first tube and delivers steam to the narrow first end of the cup. The fuel delivery end of the inner first tube is provided with a helical slot on its lateral surface for directing the CWM onto the inner surface of the rotating cup in the form of a uniform, thin sheet which, under the influence of the cup's centrifugal force, flows toward a second, open, expanded end portion of the rotating cup positioned immediately adjacent to a combustion chamber. The steam delivered to the rotating cup wets its inner surface and inhibits the coal within the CWM from adhering to the rotating cup.Type: GrantFiled: April 29, 1985Date of Patent: August 5, 1986Assignee: The United States of America as represented by the United States Department of EnergyInventors: Thomas D. Brown, Douglas P. Reehl, Gary F. Walbert
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Patent number: 4587113Abstract: Oxides of sulfur and of nitrogen are removed from waste gases by reaction with an unsupported copper oxide powder to form copper sulfate. The resulting copper sulfate is dissolved in water to effect separation from insoluble mineral ash and dried to form solid copper sulfate pentahydrate. This solid sulfate is thermally decomposed to finely divided copper oxide powder with high specific surface area. The copper oxide powder is recycled into contact with the waste gases requiring cleanup. A reducing gas can be introduced to convert the oxide of nitrogen pollutants to nitrogen.Type: GrantFiled: February 8, 1985Date of Patent: May 6, 1986Assignee: The United States of America as represented by the United States Department of EnergyInventor: James I. Joubert
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Patent number: 4584161Abstract: Neutron activation due to high levels of neutron production in a first heated deuterium-tritium plasma is substantially reduced by using Ion Cyclotron Resonance Frequency (ICRF) heating of energetic .sup.3 He.sup.++ ions in a second deuterium-.sup.3 He.sup.++ plasma which exhibit an energy distribution and density similar to that of alpha particles in fusion reactor experiments to simulate fusion alpha particle heating in the first plasma. The majority of the fast .sup.3 He.sup.++ ions and their slowing down spectrum can be studied using either a modulated hydrogen beam source for producing excited states of He.sup.+ in combination with spectrometers or double charge exchange with a high energy neutral lithium beam and charged particle detectors at the plasma edge. The maintenance problems thus associated with neutron activation are substantially reduced permitting energetic alpha particle behavior to be studied in near term large fusion experiments.Type: GrantFiled: November 16, 1983Date of Patent: April 22, 1986Assignee: The United States of America as represented by the United States Department of EnergyInventors: Douglass E. Post, Jr., David Q. Hwang, Jane Hovey
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Patent number: 4576201Abstract: A multi-port fluid valve apparatus is used to control the flow of fluids through a plurality of valves and includes a web, which preferably is a stainless steel endless belt. The belt has an aperture therethrough and is progressed, under motor drive and control, so that its aperture is moved from one valve mechanism to another. Each of the valve mechanisms comprises a pair of valve blocks which are held in fluid-tight relationship against the belt. Each valve block consists of a block having a bore through which the fluid flows, a first seal surrounding the bore and a second seal surrounding the first seal, with the distance between the first and second seals being greater than the size of the belt aperture. In order to open a valve, the motor progresses the belt aperture to where it is aligned with the two bores of a pair of valve blocks, such alignment permitting a flow of the fluid through the valve.Type: GrantFiled: November 16, 1984Date of Patent: March 18, 1986Assignee: The United States of America as represented by the United States Department of EnergyInventor: S. Frederic Guggenheim
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Patent number: 4572285Abstract: A magnetically focused liquid drop radiator for application in rejecting rgy from a spacecraft, characterized by a magnetizable liquid or slurry disposed in operative relationship within the liquid droplet generator and its fluid delivery system, in combination with magnetic means disposed in operative relationship around a liquid droplet collector of the LDR. The magnetic means are effective to focus streams of droplets directed from the generator toward the collector, thereby to assure that essentially all of the droplets are directed into the collector, even though some of the streams may be misdirected as they leave the generator. The magnetic focusing means is also effective to suppress splashing of liquid when the droplets impinge on the collector.Type: GrantFiled: December 10, 1984Date of Patent: February 25, 1986Assignee: The United States of America as represented by the Department of EnergyInventors: Thomas E. Botts, James R. Powell, Roger Lenard
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Patent number: 4561859Abstract: This invention describes a chemical process for desulfurizing coal, especially adaptable to the treatment of coal-water slurries, at temperatures as low as ambient, comprising treating the coal with aqueous titanous chloride whereby hydrogen sulfide is liberated and the desulfurized coal is separated with the conversion of titanous chloride to titanium oxides.Type: GrantFiled: April 18, 1985Date of Patent: December 31, 1985Assignee: The United States of America as represented by the United States Department of EnergyInventors: William A. Slegeir, Francis E. Healy, Richard S. Sapienza
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Patent number: 4560905Abstract: A charged particle accelerating assembly provided with a predetermined ratio of parametric structural characteristics and with related operating voltages applied to each of its linearly spaced focusing and accelerating quadrupoles, thereby to maintain a particle beam traversing the electrostatic fields of the quadrupoles in the assembly in an essentially laminar flow throughout the assembly.Type: GrantFiled: April 16, 1984Date of Patent: December 24, 1985Assignee: The United States of America as represented by the United States Department of EnergyInventor: Alfred W. Maschke
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Patent number: 4542644Abstract: Voids and particulates are detected in a flowing stream of fluid contained in a pipe by a detector which includes three transducers spaced about the pipe. A first transducer at a first location on the pipe transmits an ultrasonic signal into the stream. A second transducer detects the through-transmission of the signal at a second location and a third transducer at a third location upstream from the first location detects the back-scattering of the signal from any voids or particulates. To differentiate between voids and particulates a fourth transducer is positioned at a fourth location which is also upstream from the first location. The back-scattered signals are normalized with the through-transmission signal to minimize temperature fluctuations.Type: GrantFiled: September 26, 1983Date of Patent: September 24, 1985Assignee: The United States of America as represented by the United States Department of EnergyInventors: Thomas N. Claytor, Henry B. Karplus
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Patent number: 4540960Abstract: A radio frequency resonant cavity having a fundamental resonant frequency and characterized by being free of spurious modes. A plurality of spaced electrically conductive bars are arranged in a generally cylindrical array within the cavity to define a chamber between the bars and an outer solid cylindrically shaped wall of the cavity. A first and second plurality of mode perturbing rods are mounted in two groups at determined random locations to extend radially and axially into the cavity thereby to perturb spurious modes and cause their fields to extend through passageways between the bars and into the chamber. At least one body of lossy material is disposed within the chamber to damp all spurious modes that do extend into the chamber thereby enabling the cavity to operate free of undesired spurious modes.Type: GrantFiled: February 9, 1984Date of Patent: September 10, 1985Assignee: The United States of America as represented by the United States Department of EnergyInventor: Salvatore Giordano
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Patent number: 4532101Abstract: A limiter blade for a large tokomak fusion reactor includes three articulated blade sections for enabling the limiter blade to be adjusted for plasmas of different sizes. Each blade section is formed of a rigid backing plate carrying graphite tiles coated with titanium carbide, and the limiter blade forms a generally elliptic contour in both the poloidal and toroidal directions to uniformly distribute the heat flow to the blade. The limiter blade includes a central blade section movable along the major radius of the vacuum vessel, and upper and lower pivotal blade sections which may be pivoted by linear actuators having rollers held to the back surface of the pivotal blade sections.Type: GrantFiled: October 21, 1982Date of Patent: July 30, 1985Assignee: The United States of America as represented by the United States Department of EnergyInventor: David W. Doll
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Patent number: 4529127Abstract: A portable machine for spraying two component resins onto a roadway, the machine having a pneumatic control system, including apparatus for purging the machine of mixed resin with air and then removing remaining resin with solvent. Interlocks prevent contamination of solvent and resin, and mixed resin can be purged in the event of a power failure.Type: GrantFiled: April 25, 1983Date of Patent: July 16, 1985Assignee: The United States of America as represented by the United States Department of EnergyInventor: Donald W. Huszagh
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Patent number: 4526136Abstract: A control system for controlling the location of the nucleate-boiling region in a fluid heated steam generator comprises means for measuring the temperature gradient (change in temperature per unit length) of the heating fluid along the steam generator; means for determining a control variable in accordance with a predetermined function of temperature gradients and for generating a control signal in response thereto; and means for adjusting the feedwater flow rate in accordance with the control signal.Type: GrantFiled: May 29, 1984Date of Patent: July 2, 1985Assignee: The United States of America as represented by the United States Department of EnergyInventors: James F. Boland, John F. Koenig
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Patent number: H12Abstract: A nuclear medicine imaging system having two large field of view scintillation cameras mounted on a rotatable gantry and being movable diametrically toward or away from each other is disclosed. In addition, each camera may be rotated about an axis perpendicular to the diameter of the gantry. The movement of the cameras allows the system to be used for a variety of studies, including positron annihilation, and conventional single photon emission, as well as static orthogonal dual multi-pinhole tomography. In orthogonal dual multi-pinhole tomography, each camera is fitted with a seven pinhole collimator to provide seven views from slightly different perspectives. By using two cameras at an angle to each other, improved sensitivity and depth resolution is achieved. The computer system and interface acquires and stores a broad range of information in list mode, including patient physiological data, energy data over the full range detected by the cameras, and the camera position.Type: GrantFiled: March 11, 1983Date of Patent: January 7, 1986Assignee: The United States of America as represented by the United States Department of EnergyInventors: Gerald W. Bennett, A. Bertrand Brill, Yves J. C. Bizais, R. Wanda Rowe, I. George Zubal
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Patent number: H74Abstract: Process for the production of 2-deoxy-2-fluoro-D-glucose and the corresponding .sup.18 F-compound by the reaction of acetyl hypofluorite or the corresponding .sup.18 F-compound with 3,4,6-tri-O-acetyl-D-glucal followed by hydrolysis. Process includes the production of the hypofluorite compound at ambient temperature.Type: GrantFiled: February 24, 1983Date of Patent: June 3, 1986Assignee: The United States of America as represented by The United States Department of EnergyInventors: Chyng-Yann Shiue, Piero A. Salvadori, Alfred P. Wolf, Joanna S. Fowler, Robert R. MacGregor
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Patent number: H75Abstract: Measurement of the velocity distribution of confined energetic alpha particles resulting from deuterium-tritium fusion reactions in a magnetically contained plasma is provided. The fusion plasma is seeded with energetic boron neutrals for producing, by means of the reaction .sup.10 B (.alpha.,n) .sup.13 N reaction, radioactive nitrogen nuclei which are then collected by a probe. The radioactivity of the probe is then measured by conventional techniques in determining the energy distribution of the alpha particles in the plasma. In a preferred embodiment, diborane gas (B.sub.2 H.sub.6) is the source of the boron neutrals to produce .sup.13 N which decays almost exclusively by positron emission with a convenient half-life of 10 minutes.Type: GrantFiled: December 30, 1985Date of Patent: June 3, 1986Assignee: The United States of America as respresented by the United States Department of EnergyInventors: Larry R. Grisham, Douglass E. Post, Jr., John M. Dawson
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Patent number: H116Abstract: A readily disposable and replaceable accelerator grating for a relativistic particle accelerator. The grating is formed for a plurality of liquid droplets that are directed in precisely positioned jet streams to periodically dispose rows of droplets along the borders of a predetermined particle beam path. A plurality of lasers are used to direct laser beams into the droplets, at predetermined angles, thereby to excite the droplets to support electromagnetic accelerating resonances on their surfaces. Those resonances operate to accelerate and focus particles moving along the beam path. As the droplets are distorted or destroyed by the incoming radiation, they are replaced at a predetermined frequency by other droplets supplied through the jet streams.Type: GrantFiled: September 9, 1985Date of Patent: September 2, 1986Assignee: The United States of America as represented by the United States Department of EnergyInventor: Robert B. Palmer