Patents Represented by Attorney Jacob N. Erlich
  • 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: 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: 5376579
    Abstract: Processes to produce Silicon-On-Diamond (SOD) Structures. In one process, two epitaxial layers are grown on a seed silicon wafer. The first layer is an etch stop layer and the second layer is an undoped silicon layer. A CVD diamond is deposited on top of this substrate, and covered with a thin layer of polysilicon. This structure is now bonded to another silicon handle wafer. The seed silicon layer and the etch stop layer are removed by mechanical means and chemical etching. The substrate consists of a silicon substrate, a polysilicon layer, a diamond layer and an undoped silicon layer. In a second process a diamond layer is deposited onto a SIMOX Wafer and polysilicon is deposited upon the diamond layer. A silicon wafer is bonded to the polysilicon layer and the SIMOX wafer less the silicon overlayer on the buried oxide is removed by grinding and etching to obtain silicon-on-diamond structure.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: December 27, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Nagappan Annamalai
  • Patent number: 5367579
    Abstract: A joint transform optical correlator is disclosed having an optical path length adjustment technique for causing a first optical path length between the reference image plane and the first Fourier transform lens to differ from a second optical path length between the input image plane and the first Fourier transform lens by an amount whereby the second Fourier transform lens separates the desired cross-correlation signals from the undesired signals to enhance the performance and reliability of the correlator.
    Type: Grant
    Filed: June 25, 1993
    Date of Patent: November 22, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Bahram Javidi, Qing Tang
  • Patent number: 5363186
    Abstract: A five step method is used to produce an optical wave. The first step is to pick the desired far field pattern of the diffractive optical wave. The second step entails transforming the desired far field pattern to the desired source using a fast fourier transform (FFT). In the third step we use the formula exp[j.phi..sub.i (.sigma..sub.i)]=A.sub.i exp(j.phi..sub.i) to find the standard deviation .sigma..sub.i for each pixel i that produces the desired/average amplitude. Next, we use a pseudo-random number generator to select phases .phi..sub.i from distributions of standard deviation .sigma..sub.i for each pixel. Finally, we check the solution with the FFT and our analyses of performance.
    Type: Grant
    Filed: January 27, 1994
    Date of Patent: November 8, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Robert W. Cohn, Minhua Liang
  • Patent number: 5361069
    Abstract: An airborne radar warning receiver for track-while-scan radar including a first radar frequency receiver and logic circuitry for determining an increase in pulse rate frequency, second radar frequency receiver connected to a signal filter and an automatic gain control amplifier connected to the receiver and a logic circuitry connected to the amplifier and to the pulse rate frequency logic whereby the ratio is determined between the time from the start of scan until the radar beam illuminates the aircraft and the total scan time, thereby indicating the center of a search scan sector. A third radar frequency receiver connected to a signal filter and a logic circuitry connected to the receiver for indicating when signals are being radiated indicative of the launching of a radar controlled missile.
    Type: Grant
    Filed: July 18, 1969
    Date of Patent: November 1, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Robert A. Klimek, Jr., Elias A. McCormac, III, Ronald R. Schambeau
  • Patent number: 5350278
    Abstract: In an assembly of spaced rotor discs, mounted to rotate about a common axis, one or more discs are provided that are removably joined to the other discs but so joined, away from potential fatigue points in the disc webs. Thus a pair of discs have a spacer arm extending therebetween in contact therewith. Further, each disc of such pair, has a flange that extends between the discs toward the flange of the other disc, which flanges (and thus the discs) are removably bolted together at a junction removed from the disc webs for greater disc durability and lower replacement costs thereof. The so joined flanges and spacer arm (which is held in a piloted joint under compressive pre-load) define an annular cavity around a pair of the discs and thus redundant structural support therebetween.
    Type: Grant
    Filed: June 28, 1993
    Date of Patent: September 27, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Joseph C. Burge
  • Patent number: 5351053
    Abstract: A radar system that includes an ultra wideband radar signal processor for electronically scanned arrays that utilizes frequency offset generation (FOG) to achieve beam steering as compared with phase shift and time delay techniques of conventional radars. The device comprises a transmit antenna, a chirp generator connected to the transmit antenna and a first summing circuit, a receiver antenna connected to the first summing circuit, a Doppler de-ramping chirp circuit connected to a second summing circuit, the output of the second summing circuit connected to an amplitude and weighting circuit and the output of the amplitude circuit connected to a spectrum analyzer of a Fast Fourier Transform (FFT) circuit. The signal processing consists of mixing the target returns with the transmitted signal to obtain a video beat note signal. This video beat note signal is mixed with a Doppler de-ramping chirp waveform which is matched to the desired target velocity.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: September 27, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Michael C. Wicks, Russell D. Brown
  • Patent number: 5323965
    Abstract: A gap seal for convergent/divergent flap hinge ends to spaced disc and wall surfaces in a 2-D nozzle of a gas turbine engine is provided. The seal employs at least two cups resiliently mounted to the hinge ends, which cups independently translate axially and resiliently to contact the spaced surfaces at different or varying gaps to seal same. The translating cup seals of the invention thus maintain a constant seal in the gaps between the hinge ends and such surfaces at varying C/D hinge positions and varying operating conditions in the 2-D nozzle. That is, the cups independently maintain their seals across gaps as they expand or contract due to thermal changes as well as across gaps of different sizes.
    Type: Grant
    Filed: May 26, 1993
    Date of Patent: June 28, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Kenneth W. Froemming, Eric J. Ward
  • Patent number: 5311196
    Abstract: An optically based feed structure is used to distribute appropriately phased signals from a central signal generator to the individual elements of a phased array antenna. Any phase can be generated by adding together four phased signals (phased by 90 degree increments) if the amplitudes of the individual phased signals are appropriately controlled. By appropriately controlling the amplitude of the individual phased signals the amplitude of the resultant can also be controlled. In many cases it is desired to keep this amplitude constant. In some cases an amplitude taper across the phased array is desired.
    Type: Grant
    Filed: July 16, 1993
    Date of Patent: May 10, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Donald W. Hanson, David L. Fried
  • Patent number: 5138157
    Abstract: The direction of propagation of a neutral particle beam is determined by positioning a shadow wire in the beam and positioning an array of detector wires downstream from the shadow wire. The shadow wire forms a shadow region downstream thereof, i.e., a region which is depleted of particles due to multiple scattering events. The detector wires are each formed of a different material and the count rate of K shell X-rays emitted from the individual detector wires are used to determine the loction of the centroid of the shadow at the detector wire array. The location of the center of the shadow wire and the position of the downstream shadow centroid are used to establish the direction of beam propagation.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: August 11, 1992
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Yolanda D. Jones, Matthew G. McHarg, LeAnn D. Brasure, Daniel M. Mulder
  • Patent number: 5135196
    Abstract: A multi-axis positional gimbal assembly is provided having a junction member with two passageways therein at angles to each other, a first arm sized to insert into one of the passageways and to axially shift therein and a second arm sized to insert into the other of said passageways and to to axially shift therein. The arms are provided with locking means to releasably secure them in the passageways. The upper end of the first arm is mounted to a support member as a microscope. The distal end of the second (and lower) arm, supports a pallet pivotably mounted thereon at a point removed from the junction member. The second arm is pivotable about the axis of the first arm and also movable up and down on said first arm so as to move such pallet on all three axes, as desired, which pallet can be tilted to any desired attitude and arms and pallet locked in place.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: August 4, 1992
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Douglas K. Schehr
  • Patent number: 5130881
    Abstract: An IC socket having internal MOV devices for protecting an integrated circuit from damage due to transient overvoltages.Each MOV device is coupled between a lead of the socket and a common metallic grounding strip contained within the IC socket. The grounding strip has an output lead which is brought through the socket for connection to a convenient system grounding point.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: July 14, 1992
    Assignee: The United States of Americas as represented by the Secretary of the Air Force
    Inventor: David H. Hilland
  • Patent number: 5093639
    Abstract: An electromagnetic stripline coupler apparatus having a pair of coupler units which are separated by a conductive ground plane with a slot in it that is aligned to pass signal energy between the coupler units.
    Type: Grant
    Filed: September 20, 1990
    Date of Patent: March 3, 1992
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Peter R. Franchi, Nicholas P. Kernweis
  • Patent number: 5073006
    Abstract: A 2f Fourier transform optical correlator uses two simple, single element lenses, with the second lens performing both quadratic phase term removal and the inverse Fourier transform operation in a compact two-focal-length space. This correlator performs correlations quite well and uses three less lens elements than a prior 2f system, is shorter by a factor of two compared to the standard 4f system, and uses one less lens than the 3f system, while still retaining the variable scale feature.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: December 17, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Joseph L. Horner, Charles K. Makekau
  • Patent number: 5072554
    Abstract: A prefabricated modular building is constructed of a plurality of panels which are readily assembled and locked together without the need for tools (other than material handling and earth moving equipment) at the assembly site. The building is constructed of sets of panels, most of the panels in each set being identical.All of the vertical panels are interlocked by sliding a built in flange on each panel into a built in channel member on an adjacent panel. The vertical structural beams of each panel projects above and below the panels and these projecting ends are received by corresponding spaced receptacles in the horizontal ceiling and floor panels. In addition, an earth barricade on the roof of the building plus wall extensions provide for the covering of the roof and sides of the building with earth.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: December 17, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Lowell K. Hayman
  • Patent number: 5071231
    Abstract: Digital data processing unit includes two SLMs assembled back-to-back with a common photoreceptor, to form a bidirectional spatial light modulator (BSLM) which facilitates the flow of data in the forward and reverse directions. An image can be written from the left side of the BSLM and read from the left or right side of the unit. An image can also be written from the right side and read from the right or left or both sides of the unit. The photoreceptor sums the light image intensities when data is concurrently written from both sides into the photoreceptor.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: December 10, 1991
    Assignee: The United States of America as Represented by the Secretary of the Air Force
    Inventors: David Armitage, John I. Thackara
  • Patent number: 5070603
    Abstract: A method of separating/splitting multi-layer printed circuit wiring boards by immersing the board and the blade of a surgical knife into liquid nitrogen to lower their temperatures to that of the liquid nitrogen thereby altering the holding properties of the adhesive material between the layers of the multi-layer board. Separating one layer at a time from the printed circuit wiring board until all layers of the multi-layer board have been removed.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: December 10, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Gary R. Waldsmith
  • Patent number: 5062767
    Abstract: A shroud for supporting the vanes in the hot sections of a gas turbine engine is comprised of composite segments retained in a metal ring. The metal ring has a positive coefficient of expansion, while the segments have a zero (or much smaller) coefficient. When the ring is heated and grows, it carries the segments with it, so that there is an apparent corresponding growth of the segments.
    Type: Grant
    Filed: April 27, 1990
    Date of Patent: November 5, 1991
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Kevin L. Worley, John L. Mayers, Herbert L. Burchette