Patents Represented by Attorney, Agent or Law Firm Stanton E. Collier
  • Patent number: 5453835
    Abstract: A first signal acousto-optic (AO) cell together with a first signal source for injecting a first signal therein is disclosed along with a second AO cell together with a second signal source for injecting a second signal therein, to be correlated with the first signal. A first plus one diffracted order beam emerges from the first cell and is directed at a second cell to produce second and third plus one diffracted order beams which overlap and which produce an interference pattern that is focused on a photodetector array which determines the degree of correlation between the first and second signals. A Dove prism is employed between the cells to cause the second and third beams at the array to be counter-propagating and to control the spatial frequency of the interference pattern produced by these beams.
    Type: Grant
    Filed: July 7, 1994
    Date of Patent: September 26, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Michael J. Ward, Christopher W. Keefer
  • Patent number: 5450058
    Abstract: The deployable hazard sign from a moving vehicle comprises a means for attaching the hazard sign to the rear area of a police vehicle, for example; a means of releasing the hazard sign which also allows easy recovery; a means for powering the hazard sign once released; a means for communicating to the hazard sign the proper warning information before the release thereof; a means attached to the hazard sign to indicate that an approaching vehicle has impacted the hazard sign, and further means of allowing the elevating of the warning lights before or after release. As the police vehicle approaches the breakdown or accident, the deployable hazard sign would be released from the police vehicle, appproximately 200 to 500 feet, behind the breakdown or accident. The policeman inside would determine the proper sign mode before release. The police vehicle would not have to stop to release the sign. After the situation has cleared, the police vehicle could backup to the sign to retrieve it.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: September 12, 1995
    Inventor: Stanton E. Collier
  • Patent number: 5448252
    Abstract: An improved microstrip patch antenna has a pair, for example, of dielectric overlay strips attached along the radiating edges of the patch where the patch is rectangular. By optimizing dimensions parameters and materials, the bandwidth of the patch is increased substantially as well as the amount of radiated energy.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: September 5, 1995
    Assignee: The United States of America as Represented by the Secretary of the Air Force
    Inventors: Azar S. Ali, Kuldip C. Gupta
  • Patent number: 5438632
    Abstract: A 4-f lens system is positioned over one half of the joint input image presentation SLM device of a conventional joint transform correlator (JTC). An image displacement lens is positioned in the Fourier transform plane of the 4-f correlator and can shift the virtual displacement of the reference image plane relative to the input image plane. By the appropriate choice of this lens, any virtual displacement can be achieved to provide for substantial design flexibility of the JTC.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: August 1, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Joseph L. Horner
  • Patent number: 5431125
    Abstract: Twin-free (100) InP crystals of large dimensions and having flat crowns are produced by combining the magnetic liquid encapsulated Kyropoulos (MLEK) process and the magnetic liquid encapsulated Czochralski (MLEC) process. Observation of the flat crown by high intensity light ensures twin-free growth in the magnetic environment.
    Type: Grant
    Filed: June 14, 1991
    Date of Patent: July 11, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Stephen Bachowski, David F. Bliss, Robert M. Hilton
  • Patent number: 5428452
    Abstract: The rapidly moving uniform surface being inspected is illuminated with either laser or wide-band light. The Fourier transform of the surface is produced upon the detector plane of an electronic camera. In the absence of defects, the transform light energy is produced only in the center of the detector plane but in the presence of defects light is produced in various non-centralized portions of the detector plane which can indicate the orientation and size of the defect.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: June 27, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Thomas J. Grycewicz
  • Patent number: 5428218
    Abstract: A variable time delay system for broadband phased array receive and other transversal filtering applications is disclosed and employs a segmented mirror device (SMD) and a linear fiber array to realize a quantized variable delay line. The use of the SMD allows for extremely high packing density without the large losses usually associated with switched fiber schemes.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: June 27, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Edward N. Toughlian, Henry Zmuda
  • Patent number: 5425044
    Abstract: A compact, high-repetitively(rep)-rate photolytic atomic iodine laser (PIL) using blowdown flow and cryogenic pumping increases the rep rate from 0.5 Hz to at least 10 Hz. The average power of the pulsed laser increases from 35 to 700 Watts output. The present invention maintains the demonstrated beam quality of better than 1.5 x diffraction limited, a coherence length of greater than 45 meters, to J/pulse output energy; polarization extinction ratio greater than 100:1; pulse length of 7-12 sec; and jitter less than 1 radian. The laser power and beam quality in this type of device is relatively insensitive to the actual fuel pressure and temperature in the laser cavity at the time of the pulse. The cavity pressure is allowed to vary between plus or minus thirty percent of the optimal value of the cavity height-pressure product of 300 torr-cm during the run period of nominally twenty seconds. Flow is established by boiling liquid C.sub.3 F.sub.7 I at a temperature of 10.degree. C.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: June 13, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: LaVerne A. Schlie, David P. Dimiduk, Bruce S. Masson
  • Patent number: 5422047
    Abstract: Provided is a method for making high-temperature high-performance fuel particles wherein fertile or fissile metal carbides are dispersed in spherical graphite skeletons. That is, a fissile metal salt, such as uranyl nitrate, is added to an aqua-mesophase in alkaline solution, to form a fuel solution. The fuel solution is added to an oil bath to form an emulsion of aqueous pitch-derrived spheres in oil. The emulsion is heated and stirred to drive water from the spheres to dry them into solid spheres which contain the above metal salts. The solid spheres are then heated to between 700-1100 C. to carbonize them and convert the metal salts to metal oxides and then the spheres are further heated to between 2000.degree.-3000.degree. C., to carburize the metal oxides to metal carbides and graphitize the carbon. The resulting fuel spheres are then preferably coated by deposition thereon, of a carbon or carbide coating to contain the future reaction products thereof.
    Type: Grant
    Filed: March 31, 1994
    Date of Patent: June 6, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Timothy D. Naughton
  • Patent number: 5410558
    Abstract: The free electron laser wiggler has therein a device for generating a variable short period wiggler field. A Type II superconducting material is formed into a field modifying means having a channel therein through which a beam of free electrons travels. The field modifying means is held within a vacuum chamber further having a source of external magnetic fields therein and a cooling means therein. The magnetic field generated must fall within the upper and lower critical magnetic field of the Type II superconducting material. The magnetic field penetrates the superconducting material generating a mixed state of superconducting and normal regions. The amplitude and period of the wiggler field in this structure can be controlled by varying the temperature, applied magnetic field, and the impurity concentration in the superconducting material to affect the fluxoid lattice. The electron beam interacting with this wiggler field outputs short wavelength radiation.
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: April 25, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Kirk E. Hackett
  • Patent number: 5403153
    Abstract: The invention provides a woven composite lightweight turbine blade in which, e.g. ceramic or carbon fibers are woven around a foam core in the airfoil section of the blade and around a removable mandrel in the dovetail section of the blade, and braided at the tip and root thereof to define a woven blade pre-form. An infiltrant of e.g. phenolic, carbon or ceramic is added to the woven pre-form, which is then pyrolized to provide a thermally stable matrix in the pre-form and define a composite woven blade therewith. The resulting blade has a cavity in the air foil section between the tip and root sections of the blade and a hollow dovetail section. The dovetail section has reinforcing carbon or ceramic fibers mounted across the resulting passageway through the dovetail, which fibers are cooled by air passing through such dovetail passage such that the dovetail acts as a heat exchanger for the so-formed woven composite blade.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: April 4, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Raymond H. Goetze
  • Patent number: 5392988
    Abstract: The uniform droplet injector assembly is a rigid, low mass injector having a plurality of nozzles therein attached to a manifold. The manifold vibrates by piezoelectric actuators and springs in combination. The droplet injector array allows the process stream to flow through the injector assembly with the droplets uniformly dispersed into this stream. The moving parts such as the injector assembly, springs, and actuators are structurally resonant at a frequency near the droplet formation frequency. The colinear, spring/actuator configuration minimizes internal stresses due to manufacturing tolerances, preloading requirements, temperature changes, and cyclic operation in a large area generator. The linear spring/actuator configuration has low stiffness in the vibration direction and high stiffness in transverse direction to eliminate motions which would cause nonuniformly sized droplets.
    Type: Grant
    Filed: January 19, 1994
    Date of Patent: February 28, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: William J. Thayer, III
  • Patent number: 5387331
    Abstract: A wafer cutting device has a plurality of individually highly tensioned diamond impregnated wires that are mounted in a translatable head. Each wire has a tension monitor connected thereto for the purpose of insuring uniform tension and also alerting to breakage. Further, a differential DC voltage is applied to the wires and the crystal with the assistance of electrolytes to improve the removal of material for minimizing damage to the surfaces. The crystal is mounted on a two dimensional stage. During normal cutting the crystal is moved vertically into the cutting wire. The vertical cutting rate is adjusted due to the configuration of the crystal. At the end of cutting, the crystal is moved laterally so as to place a notch in the wafers for the purpose of removing the wafer in a clean break.
    Type: Grant
    Filed: May 19, 1994
    Date of Patent: February 7, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Brian S. Ahern, David W. Weyburne, Gerald W. Iseler, Harry R. Clark, Jr.
  • Patent number: 5384294
    Abstract: Method is provided for preparing PbO-based ceramics by mixing metal cations in alkanolamines and then adding the mixture to lead carboxylates in alcohol, to obtain ceramic solutions or gels therefrom. The metal cations are sourced from metal alkoxides, chelates and salts and include metals of Ti, Zr and La. The above solutions and gels can be employed to form PbO-based powders, fibers and films, e.g. films of PZT and PLZT, which find electrical and optical applications such as ferroelectric memory and dielectric waveguides. The invention resides in the above method and resulting PbO ceramics which have e.g. films of considerably higher dielectric constants than previously known in the art.
    Type: Grant
    Filed: November 30, 1993
    Date of Patent: January 24, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Gimtong Teowee, Jonathan M. Boulton, Donald R. Uhlmann
  • Patent number: 5378341
    Abstract: The sputtering source of the present invention comprises a means for providing DC or RF power and cooling to a conical target electrode with magnets thereabout and anode at the bottom. At the center of the sputtering source is a grounded anode. A plurality of magnets which form rings are located behind the conical target electrode so that the magnetic field lines point to the anode. The conical target electrode has an inner surface which is slightly inclined from a centerline. The conical target electrode is concentrically located about the vertical centerline. A ground shield is placed about and above the magnets and the conical electrode and further acts to eliminate high energy ions from reaching the substrate because of the shape thereof. An opening in the shield allows for the exit of low energy particles of the target material sputtered from the conical target electrode. The sputtering source provides a narrow beam of target material for deposition on a substrate located at a distance from the source.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: January 3, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Alvin J. Drehman, William M. Hale
  • Patent number: 5378449
    Abstract: Potassium superoxide can be used to generate and regenerate Basic Hydrogen Peroxide, the primary fuel for Chemical Oxygen-Iodine Lasers. The solid reacts with depleted BHP/H.sub.2 O.sub.2 solution consuming one equivalent of hydrogen peroxide and producing two equivalents of hydroperoxide, reversing the chlorine/BHP reaction that evolves singlet delta oxygen, the energetic species in the COIL system. This same regeneration reaction can be used to generate new BHP solutions by reaction of potassium superoxide with dilute hydrogen peroxide or a protic mineral acid such as hydrochloric acid. These reactions of potassium superoxide provide new and useful methods of generating and regenerating BHP, that significantly decrease COIL system weights and environmental impact.
    Type: Grant
    Filed: August 31, 1993
    Date of Patent: January 3, 1995
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Warren L. Dinges
  • Patent number: 5376626
    Abstract: A superconducting switch is composed of anisotropic magnetic material. The switch has a first superconducting section, a variable resistive section and a second superconducting section. An external magnetic field is applied so that the first and second superconducting sections remain superconducting and the resistive section changes resistance when the magnetic field applied exceeds the critical field of the variable resistance section. The different critical field regions are achieved by exploiting the natural critical field anisotropy of the ceramic superconductors (a previously unobserved phenomena in metal superconductors). By making the different sections with different orientations they will exhibit different critical field valves for a given direction of applied fields. The state of the switch is changed by either increasing or decreasing the external magnetic field about the critical field value of the resistive section of the switch.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: December 27, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Alvin J. Drehman, Stephen Bachowski
  • Patent number: 5371757
    Abstract: A semiconductor master oscillator generates light which seeds a pair of semiconductor power amplifiers which straddle the oscillator. The power amplifiers have slightly misaligned mirror facets which induce substantial resonator losses in the amplifiers and as a result, the amplifier gain is very high and the modulating speed of the oscillator is also very high.
    Type: Grant
    Filed: October 22, 1993
    Date of Patent: December 6, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Craig C. Largent
  • Patent number: 5369660
    Abstract: A repetitively pulsed, high energy, closed cycle photolytic atomic iodine lasers operates at 1.315 microns. Using an iodine (I.sub.2) removal system for the photolyzed C.sub.3 F.sub.7 I laser fuel, more than 70 joules/pulse is output in the fundamental mode from a M=3 confocal unstable resonator at a 0.5 Hz repetition rate. The closed cycle iodine (I.sub.2) removal system consisted of a condensative-evaporative section, two Cu mesh I.sub.2 sections, and an internal turbo-molecular blower. This closed cycle system uses C.sub.3 F.sub.7 I gas at 10-60 torr absent of I.sub.2. The turbo-molecular blower is able to push high molecular weight gases at high velocities. The turbo-molecular blower is able to produce longitudinal flow velocities greater than 10 m/s through the 150 cm long by 7.5.times.7.5 cm.sup.2 cross sectional photolytic iodine gain region. In addition to the high energy output, the resulting 7-12 .mu.sec laser beam has a beam quality less than 1.
    Type: Grant
    Filed: September 23, 1992
    Date of Patent: November 29, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: LaVerne A. Schlie, Robert D. Rathge
  • Patent number: 5365784
    Abstract: The present invention is a humidity sensor which can be used in a radiosonde. The humidity sensor includes a heat sink attached to the radiosonde, a Peltier cooler attached to the heat sink, a carbon element with a thermistor attached therein or thereon, and a control means. The resistance of the carbon element is adjusted to a predetermined level to maintain a relative humidity of about 33, in particular. The control means monitors this resistance and adjusts the Peltier cooler accordingly. The thermistor responding to the temperature of the carbon element outputs a resistance indicative of the temperature on the sensor surface.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: November 22, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: James F. Morrissey