Patents Examined by Davis L. Willis
  • Patent number: 5569923
    Abstract: There is disclosed a fiber optic probe for infrared (IR) spectroscopy of a kind which serves both for illuminating a fluid or solid sample and for collecting the light reflected therefrom for spectral analysis. The probe has a tubular sheath with an inner, infrared radiation reflecting surface, holding light input and output optical fibers. The sheath has a sampling tip and the optical fibers stop short of the edge, forming with the sampling tip a sampling cavity.
    Type: Grant
    Filed: March 15, 1995
    Date of Patent: October 29, 1996
    Assignee: The State of Israel Atomic Energy Commission Soreq Nuclear Research Center
    Inventors: Yitzhak Weissman, Rami Herman, Aharon Bornstein, Israel Tugendhaft
  • Patent number: 5569924
    Abstract: A SPECT camera system has two detector heads (16a, 16b) which are movable between position (FIG. 2) and an adjacent, orthogonal position (FIG. 3). The detector heads have slide members (42a, 42b) which are slidably received on linear guide members (40a, 40b) of carriers (16a, 16b). The carriers have followers (20a, 22a, 24a; 20b, 22b, 24b) which are slidably received along linear guide paths (26a, 28a, 30a; 26b; 28b, 30b). Hydraulic or other extensible cylinders (32a, 32b) selectively permit the carriers, hence the detector heads, to slide along the guide paths between the 180.degree. opposite and the adjacent, orthogonal positions. Preferably, a rotating gantry (12) is rotated to place both detector heads above an intended position. In this manner, the extensible cylinders controllably lower the detector heads as they move by gravity from the present position to the intended position. In both the 180.degree.
    Type: Grant
    Filed: August 18, 1994
    Date of Patent: October 29, 1996
    Assignee: Picker International, Inc.
    Inventor: Steven J. Plummer
  • Patent number: 5569922
    Abstract: Method and apparatus for diagnosing fuel-related problems at the site of vehicle servicing and matching fuels to new engine designs. Fuel properties associated with a fuel sample can be measured with mid-infrared analysis. The measured fuel property values can be compared with pre-determined preferred values for the fuel properties for the particular type of vehicle. Fuel-related problems can then be identified and diagnosed based upon this comparison, and the diagnosis can be immediately displayed for the operator. In one embodiment, driveability index can be determined in situ and in real time. In other embodiments, octane number, and Reid vapor pressure can be similarly determined.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: October 29, 1996
    Assignee: Boston Advanced Technologies, Inc.
    Inventor: Richard H. Clarke
  • Patent number: 5567937
    Abstract: A night vision device test arrangement for determination of spectral sensitivity field of view and other operating characteristics of night vision devices. The test arrangement includes a controllable array of radiant energy emitters such as narrow-band light emitting diode elements used to display a night vision device test pattern. The displayed test pattern may be located in the infrared or infrared and visible spectrum regions and may be altered by user command to have different configurations including different physical size, shape and array location and different spectral content. Control of the test pattern may employ a computer or a manual selection apparatus. The disclosed apparatus is especially suited to in-the-field GO/NO GO rapid performance verification of night vision device equipment. Military and non-military uses are contemplated.
    Type: Grant
    Filed: July 10, 1995
    Date of Patent: October 22, 1996
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Alan R. Pinkus
  • Patent number: 5567943
    Abstract: A personal radiation detection device is provided having a housing containing within at least one sheet of rare earth intensifying screen that interacts with ionizing radiation when present at a specified exposure level to generate visible light and a plurality of photoresistors which is sensitive to the visible light and conducts a voltage upon the detection of the light. A specular reflector such as reflective tape, foil, or a finely polished mirror is also provided to reflect any stray visible light in the direction of the photoresistors. The photoresistors send a signal through a resistor to an operational amplifier which then activates an indicator including a light and/or an audible buzzer. The lightweight housing may also be provided with a slot on an outside surface to hold standard photographic film used to monitor cumulative exposure to radiation. A battery is provided to generate power to operate the device.
    Type: Grant
    Filed: November 3, 1995
    Date of Patent: October 22, 1996
    Inventor: Craig A. Plevinsky
  • Patent number: 5561290
    Abstract: An optical detector calibrator system simulates a source of optical radiation to which a detector to be calibrated is responsive. A light source selected to emit radiation in a range of wavelengths corresponding to the spectral signature of the source is disposed within a housing containing a microprocessor for controlling the light source and other system elements. An adjustable iris and a multiple aperture filter wheel are provided for controlling the intensity of radiation emitted from the housing by the light source to adjust the simulated distance between the light source and the detector to be calibrated. The geared iris has an aperture whose size is adjustable by means of a first stepper motor controlled by the microprocessor. The multiple aperture filter wheel contains neutral density filters of different attenuation levels which are selectively positioned in the path of the emitted radiation by a second stepper motor that is also controlled by the microprocessor.
    Type: Grant
    Filed: June 9, 1995
    Date of Patent: October 1, 1996
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
    Inventors: James P. Strobel, John S. Moerk, Robert C. Youngquist
  • Patent number: 5561295
    Abstract: A photoconductive detector array which is responsive to infrared light to provide an electrical output response includes a substrate which is transparent to infrared light. A continuous layer of photoconductive material is disposed upon the substrate, and a conductive grid disposed on the continuous layer of photoconductive material divides the photoconductive material electrically but not physically into plural detector areas. Electrical connection structure is provided for individual electrical contact with a central region of each one of the plural detector areas. A method of making a detector array according to the invention includes forming plural perforations through the continuous layer of photoconductive material to expose the substrate. The electrical connection structure includes contacts which are secured to the substrate through the photoconductive material and which effect electrical connection with this material for each one of the plural detector areas.
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: October 1, 1996
    Assignee: Litton Systems, Inc.
    Inventors: Niels F. Jacksen, Mark K. Preis
  • Patent number: 5557106
    Abstract: A lens segment used in passive infrared motion detectors is disclosed. A preferred embodiment has semi-circular rings separated by grooves. The semi-circular rings are offset about a separation axis passing through their centers or optical axes. The separation axis effectively divides the lens segment into two subsegments causing projection of two cross-sectional areas of coverage, one offset from the other. This increases the size of the projected cross-sectional area of coverage preventing a rodent near the lens from substantially filling the projected cross-sectional area of coverage, thus avoiding detection of the rodent.
    Type: Grant
    Filed: August 15, 1995
    Date of Patent: September 17, 1996
    Assignee: Alarm Device Manufacturing Co.
    Inventor: Frank Ioco
  • Patent number: 5552606
    Abstract: A variable filter arrangement wherein differently sized and shaped filters are automatically selected and installed from a collection of filters housed within a configuration for use with a radiation source. The line source is typically used for transmission scanning to collect attenuation correction factors. A line source is utilized in the preferred embodiment and a series of filters (e.g., differently sized "bow-tie" filters) are rotatably attached to a central junction so that a particular filter can be rotated into an installed position. When installed, the filter acts to attenuate the radiation emitted from the line source to reduce radiation emitted on an otherwise unobstructed area of a scintillation detector. Differently sized filters are advantageously used to accommodate differently sized patents and also to accommodate different unobstructed parts of a detector for different angles of rotation during an ECT transmission scan.
    Type: Grant
    Filed: May 11, 1995
    Date of Patent: September 3, 1996
    Assignee: ADAC Laboratories, Inc.
    Inventors: Steven M. Jones, Michael J. Janicki, Thomas E. Lang, John R. Liebig, Xiaohan Wang
  • Patent number: 5552608
    Abstract: A radiation detector having an evacuated envelope, a radiation detector on a cold finger support in the evacuated space, a closed cycle gas cooling system to cool the cold finger to provide cryogenic operation of the radiation detector, and a getter in the evacuated space to maintain an evacuated condition. The evacuated envelope includes a radiation window. The radiation detector is preferably an X-ray detector employed in an energy dispersive spectrometry system. The evacuated space is preferably held at a pressure of less than about 1 mTorr to achieve molecular flow of remaining gas molecules, minimizing parasitic heat input. The closed cycle gas cooling system employs compressed refrigerant, which is precooled in a counterflow heat exchanger and allowed to expand in proximity to the cold finger, thus absorbing heat and maintaining cryogenic temperatures. A getter material, preferably activated carbon, is provided to absorb gasses and maintain the low pressure during operation.
    Type: Grant
    Filed: June 26, 1995
    Date of Patent: September 3, 1996
    Assignee: Philips Electronics North America Corporation
    Inventors: Brian W. Gallagher, Costas Blionas, Joseph A. Nicolosi, Richard Barbara
  • Patent number: 5550376
    Abstract: A method of calibrating a linear pushbroom imaging device used in non-destructive testing of a part manufactured according to a CAD model involves identifying the location of fixed reference points, such as tooling balls in the CAD model. Positioning the part on a fixture having tooling balls fixed relative to each other in the same manner as those in the CAD model. Adjusting the part on the fixture such that points on the surface of the part known to be accurate have the same locations relative to the tooling bails as the CAD part is to the CAD tooling balls. Obtaining several projection images of the part and tooling balls at different angles about an axis of rotation passing through the part. Using the known 3D locations of the center of the CAD tooling balls and the corresponding measured screen locations of the is actual tooling balls, transformation matrices, G, M.sub.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: August 27, 1996
    Assignee: General Electric Company
    Inventors: Rajiv Gupta, Julia A. Noble, Richard I. Hartley, Andrea M. Schmitz
  • Patent number: 5550375
    Abstract: Gases can be selectively detected by the utilization of a infrared spectrometer via their specific absorption in the infrared spectral range. The sensor of the present invention is developed for continuously controlling a gaseous stream or a space filled with gas with the sensor being a single-piece shaped part manufactured as a microstructured body. The space filled with gas to be tested is between a mirror grating and entrance and exit slits for IR-radiation. The sensor is compact and robust, suitable for portable instruments, and can be manufactured at low cost and in large numbers. The sensor can also be made of metal and can be used even at an increased temperature. By using the sensor of the present invention, the safety of systems in which flammable, toxic or other gases are contained or may occur can be considerably increased in an economic manner.
    Type: Grant
    Filed: January 4, 1995
    Date of Patent: August 27, 1996
    Assignee: microParts
    Inventors: Ralf-Peter Peters, Arnd Rogner, Nezih Unal, Lothar Heinrich, Dierk Landwehr, Wolfgang A. D. Heyde
  • Patent number: 5550382
    Abstract: The invention relates to a process and an apparatus for compacting binary informations, then reconstructing and processing them in delayed time or with a time lag. It consists of compacting the binary informations by posting during a given cycle informations received on several channels and then associating non-zero information sums with memory channel numbers. It then consists solely of reconstructing the useful informations by coding them in cycle table form. Applied to nuclear fission, this invention consists of delayed time processing of tables in order to determine the proportion of neutrons induced by a fission and neutrons coming from other reactions.
    Type: Grant
    Filed: April 21, 1995
    Date of Patent: August 27, 1996
    Assignee: Commissariat A L'Energie Atomique
    Inventors: Joel Loridon, Jean-Luc Ma, Alain Marini, Michel Latu
  • Patent number: 5548126
    Abstract: An apparatus is described for reading an image from a stimulable phosphor sheet (1) carrying a radiation image thereon. The apparatus comprises exposing means (2) for exposing the sheet (1) to scanning stimulating radiation which causes the sheet (1) to emit light in the pattern of the stored image, the stimulating radiation being deflected into the trace direction by means of galvanometric deflection. Detecting means (13) photo-electrically detect the emitted light. Erasing means (22) progressively exposes the sheet (1) to erasing radiation during the retrace steps of the galvanometric deflection to erase any residual image on the sheet (1) to enable subsequent re-use thereof by exposure of the sheet (1) to erasing radiation.
    Type: Grant
    Filed: August 31, 1995
    Date of Patent: August 20, 1996
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Walter Exelmans, Gentil Verbeke
  • Patent number: 5548123
    Abstract: Apparatus for generating plural electrical signals in a single scan in response to incident X-rays received from an object. Each electrical signal represents an image of the object at a different range of energies of the incident X-rays. The apparatus comprises a first X-ray detector, a second X-ray detector stacked upstream of the first X-ray detector, and an X-ray absorber stacked upstream of the first X-ray detector. The X-ray absorber provides an energy-dependent absorption of the incident X-rays before they are incident at the first X-ray detector, but provides no absorption of the incident X-rays before they are incident at the second X-ray detector. The first X-ray detector includes a linear array of first pixels, each of which produces an electrical output in response to the incident X-rays in a first range of energies. The first X-ray detector also includes a circuit that generates a first electrical signal in response to the electrical output of each of the first pixels.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: August 20, 1996
    Assignee: Regents of the University of California
    Inventors: Victor Perez-Mendez, Claude A. Goodman
  • Patent number: 5548121
    Abstract: An electronically shielded solid state charged particle detector system having enhanced radio frequency interference immunity includes a detector housing with a detector entrance opening for receiving the charged particles. A charged particle detector having an active surface is disposed within the housing. The active surface faces toward the detector entrance opening for providing electrical signals representative of the received charged particles when the received charged particles are applied to the active surface. A conductive layer is disposed upon the active surface. In a preferred embodiment, a nonconductive layer is disposed between the conductive layer and the active surface. The conductive layer is electrically coupled to the detector housing to provide a substantially continuous conductive electrical shield surrounding the active surface. The inner surface of the detector housing is supplemented with a radio frequency absorbing material such as ferrite.
    Type: Grant
    Filed: June 27, 1995
    Date of Patent: August 20, 1996
    Inventors: David K. Balmer, Thomas W. Haverty, Carl W. Nordin, William H. Tyree
  • Patent number: 5548124
    Abstract: An excitation light beam intensity-modulated and output from a light-sending unit is irradiated on a target measurement object. A scattered light beam or a reaction light beam is detected by a light-receiving unit through a wavelength selector. The light-receiving unit outputs a signal according to the product of a supplied modulation signal and the received light beam. A processing unit acquires data corresponding to the product value for each type of light, and calculates the decay characteristics of the reaction light beam on the basis of the acquisition result. In this manner, with a simple arrangement, the decay time of a fluorescence sample or the like is precisely measured in a wide frequency range.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: August 20, 1996
    Assignee: Hamamatsu Photonics K.K.
    Inventors: Akira Takeshima, Musubu Koishi
  • Patent number: 5545901
    Abstract: An apparatus and method are set for determining the centers of capillaries in a multicapillary electrophoresis array for subsequent rapid and efficient laser induced fluorescence interrogation. A galvometric scanner reflects the laser beam to scan the array during an alignment pre-scan. The beam interacts with the array to produce an intensity pattern indicative of the capillary centers. The scanner positions corresponding to the capillary centers determined during the pre-scan is recalled to direct the beam during the interrogation scan to the column centers.
    Type: Grant
    Filed: August 23, 1995
    Date of Patent: August 13, 1996
    Assignee: Beckman Instruments, Inc.
    Inventors: Stephen L. Pentoney, Jr., Clarence Y. Lew, David Rakestraw
  • Patent number: 5543616
    Abstract: Methods for determining maximum oil saturation and possible oil zone location use natural oil inclusions in rock grains of granular rock samples. A first technique involves quantitatively determining the total number of grains in the sample and, of those grains, the number that include oil within them, thereby yielding a ratio (GOI); and correlating that ratio against standard rock samples to yield the maximum oil saturation.
    Type: Grant
    Filed: July 25, 1995
    Date of Patent: August 6, 1996
    Assignee: Commonwealth Scientific Industrial Research Organisation
    Inventors: Peter J. Eadington, Mark Lisk, Francis W. Krieger
  • Patent number: 5539225
    Abstract: Measurement-while-drilling apparatus includes a 14 MeV neutron accelerator, a near-spaced neutron detector which primarily senses source neutrons and whose output is proportional to source strength, one or more intermediately-spaced epithermal neutron detectors eccentered against the drill collar wall and primarily responsive to formation hydrogen concentration, and a third far-spaced radiation detector, either gamma ray or neutron, primarily responsive to formation density. The intermediately-spaced and far-spaced detector outputs, normalized by the near-spaced detector output, are combined to provide measurements of porosity, density and lithology and to detect gas. A thermal neutron detector and/or a gamma ray detector may also be provided at intermediate spacings to provide additional information of interest, such as standoff measurements and spectral analysis of formation composition. Tool outputs are related to the angular or azimuthal orientation of the measurement apparatus in the borehole.
    Type: Grant
    Filed: September 16, 1994
    Date of Patent: July 23, 1996
    Assignee: Schlumberger Technology Corporation
    Inventors: William A. Loomis, Kenneth E. Stephenson, Jerome A. Truax, Wolfgang P. Ziegler, S. Zema Chowdhuri, Benoit Couet, Michael L. Evans, Paul Albats, Bradley A. Roscoe, Jacques M. Holenka, Keith A. Moriarty, William R. Sloan