Solid Content Of Gas Patents (Class 73/28.01)
  • Patent number: 7523641
    Abstract: A method to measure exhaust-gas components are determined by exposing a surface of a part to exhaust gas, cleansing the surface exposed to the exhaust gas with a solvent, and measuring the pH of the solvent obtained in the cleansing process. Alternatively, the electric conductivity of the solvent after the exposure is measured. The acidic matter, selectively at least one of NOx or SOx in the exhaust gas can be quantified. The larger the pH value or conductivity, the higher the density of electrolytes, selectively SOx or Nox in the exhaust gas.
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: April 28, 2009
    Assignee: Juon Co., Ltd.
    Inventor: Tetsuro Nishimoto
  • Patent number: 7523642
    Abstract: A method for determining fractions of coolants emitted into the atmosphere in processes using coolants, in particular in the metal processing industry. Here, samples of the atmosphere polluted with fractions of coolants in droplet and vapor form are fed to an evaporator. In the evaporator, the fractions of coolants in droplet form contained in the samples are evaporated and subsequently the vapor resulting from the fractions of coolants in droplet form is fed to an analysis unit, in particular a flame ionization detector, together with the fractions of coolants in vapor form contained in the samples. In the analysis unit the concentrations of the coolants contained in the samples are ascertained.
    Type: Grant
    Filed: July 21, 2006
    Date of Patent: April 28, 2009
    Assignee: Palas GmbH Parikel-und Lasermesstechnik
    Inventors: Wilhelm Höflinger, Peter Wlaschitz
  • Publication number: 20090095053
    Abstract: A method and apparatus for rapid and accurate detection and discrimination of biological, radiological, and chemical particles in air. A suspect aerosol of the target particulates is treated with a taggant aerosol of ultrafine particulates. Coagulation of the taggant and target particles causes a change in fluorescent properties of the cloud, providing an indication of the presence of the target.
    Type: Application
    Filed: October 12, 2007
    Publication date: April 16, 2009
    Applicant: LOS ALAMOS NATIONAL SECURITY LLC
    Inventors: Kathryn Louise Creek, Alonso Castro, Perry Clayton Gray
  • Patent number: 7511809
    Abstract: An air sampler module is provided for use with a detection device that monitors liquids and/or solids on a surface using spectroscopy techniques. The air sampler module comprises a housing, an intake port for collecting air containing airborne threats to be analyzed by the detection device, and a port to permit communication of an optical transceiver of the detection device into the housing to permit analysis of the collected air. Thus, the capabilities of a spectroscopy detection system are expanded to include the ability to analyze airborne threats.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: March 31, 2009
    Assignee: ITT Manufacturing Enterprises, Inc.
    Inventors: Thomas Wayne Schneider, James Pendell Jones, Wayne Armstrong, Jeromy Rezac, Ratnesar-Shumate Ashni Shanna, Claudia Randolph, Robert Almassy
  • Patent number: 7503204
    Abstract: Systems and methods for the detection of substances (particularly particulate substances) within mail pieces, specifically letters and other “flats” of mail. In particular, the systems and methods are for the detection of residues of Chemical or Biological Warfare Agents (CBWAs) which may be present within the mail pieces. The system is principally designed to be included as part of Dual Pass Rough Cull System (DPRCS) for the collection and detection of the residue when the contaminated mail piece first enters a mail facility and before it is intermingled with other mail pieces.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: March 17, 2009
    Assignee: DRS Sustainment Systems, Inc.
    Inventors: James J. Strohmeyer, William Blumfelder, John Tehan, Dennis Osterhorn, Joseph Matteoni, William J. Nelgner, Brian Lybarger, David Schenken, James Wagy
  • Publication number: 20090056416
    Abstract: A ceramic particulate matter sensor to measure particulate matter within an exhaust stream. The particulate matter sensor includes a high voltage electrode on a first conductive layer and a detection electrode on a second conductive layer within a stack of ceramic layers. The stack of ceramic layers is bonded as a single rigid structure. The detection electrode generates a measurement of particulate matter within an exhaust stream. The particulate matter sensor also includes an insulating material positioned adjacent to the second conductive layer to insulate the detection electrode from another conductive layer within the stack of ceramic layers. The particulate matter sensor also includes an electrical heater to burn off an accumulation of contaminating particulate matter from at least one electrode of the high voltage and detection electrodes. The particulate matter sensor also includes means for substantially preventing electrical leakage through the insulating material to the second conductive layer.
    Type: Application
    Filed: September 2, 2008
    Publication date: March 5, 2009
    Inventors: Balakrishnan G. Nair, Brett Henderson, Gangqiang Wang, Thomas Koemer Pace
  • Patent number: 7493816
    Abstract: An aspirated smoke detector includes a flow path and a generator of acoustic waves in the flow path. Airborne particulate matter in the flow path responds to the acoustic field by particle agglomeration; the resulting larger particles flow into a photoelectric-type smoke sensor. A sensed level of particles can be processed, or compared to one or more predetermined thresholds to establish presence of one or more predetermined conditions.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: February 24, 2009
    Assignee: Honeywell International Inc.
    Inventors: Dragan P. Petrovic, Lorenzo Luterotti
  • Patent number: 7481095
    Abstract: A system for detecting fine liquid, e.g., oil, particles in a gas system having a conduit through which a gas, e.g., hydrogen, air, etc., will flow. The detection system includes a monitor including a high sensitivity photometric sensor, a data acquisition unit and flow and pressure control components to control the pressure and rate of flow of the gas to the monitor. The detection system is arranged to detect the presence of fine liquid particles the gas passing through the conduit and to provide an alert signal representative of the mass count of such particles in response thereto.
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: January 27, 2009
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Frank Kenneth Schweighardt, David Hon Sing Ying, Dean Anthony Chin-Fatt, Kevin Boyle Fogash, Charles Randall Kayhart
  • Patent number: 7464581
    Abstract: It is an object to provide a vacuum apparatus capable of evaluating its cleanness precisely by surely monitoring particles including deposits readily detached from the apparatus, and a particle monitoring method and program employed therein, and a window member for particle monitoring. A semiconductor manufacturing apparatus 1000 includes a processing chamber 100 for performing a manufacturing processing on a wafer. A gas supply line for introducing a purge gas is connected to an upper portion of the processing chamber 100, a valve 120 being installed on the gas supply line. A rough pumping line 200 with a valve a is connected to a lower portion of the processing chamber 100. Installed on the rough pumping line 200 are a dry pump 220 for exhausting a gas in the processing chamber 100 and a particle monitoring unit 210 for monitoring particles between the valve a and the dry pump 220.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: December 16, 2008
    Assignee: Tokyo Electron Limited
    Inventors: Tsuyoshi Moriya, Hiroyuki Nakayama
  • Patent number: 7458247
    Abstract: A semiconductor manufacturing apparatus includes a processing chamber for performing a manufacturing processing on a wafer. A gas supply line for introducing a purge gas is connected to an upper portion of the processing chamber, a valve being installed on the gas supply line. A rough pumping line with a valve a is connected to a lower portion of the processing chamber. Installed on the rough pumping line are a dry pump for exhausting a gas in the processing chamber and a particle monitoring unit for monitoring particles between the valve a and the dry pump. In the semiconductor manufacturing apparatus, after the valve is opened, the purge gas is supplied to apply physical vibration due to shock wave in the processing chamber 100 so that deposits are detached therefrom to be monitored as particles.
    Type: Grant
    Filed: February 28, 2007
    Date of Patent: December 2, 2008
    Assignee: Tokyo Electron Limited
    Inventors: Tsuyoshi Moriya, Hiroyuki Nakayama
  • Patent number: 7449038
    Abstract: A method of detecting leaks in the filter bags of a baghouse filter chamber that includes determining when the filter bags have been cleaned and, during a post-cleaning period after the cleaning of the filter bags, determining whether the opacity level of the exhaust of the baghouse filter chamber exceeds a predefined opacity limit. The determining whether the opacity level of the exhaust of the baghouse filter chamber exceeds a predefined opacity limit may include monitoring the opacity level of the exhaust of the baghouse filter chamber with an opacity sensor during the post-cleaning period and comparing the opacity readings during the post-cleaning period with the value of the predefined opacity limit.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: November 11, 2008
    Assignee: General Electric Company
    Inventors: John Wesley Grant, Donald R. Pegelow
  • Publication number: 20080250845
    Abstract: A mail screening device for hazardous materials is disclosed. The mail screening device comprises a sample collection unit that uses air jets or air knives to dislodge residues of hazardous materials from a mail, and a detection unit that detects the hazardous materials in the exhaust air flow. Comparing to traditional mail screening systems that use belts and rollers to physically pinch a mail for sample collection, the device of the present invention is less complex and easier to operate, thereby reducing installation, maintenance and replacement costs.
    Type: Application
    Filed: April 12, 2007
    Publication date: October 16, 2008
    Inventors: Eric Gregory Burroughs, Kenneth Scott Damer, Matt Szarek
  • Patent number: 7430893
    Abstract: The present invention relates to a system and method for sampling a gas flow to measure one or more contaminants within a semiconductor processing tool. The system includes a portable unit containing one or more dry traps, Tenax traps and, if desired, wet impingers. The unit is coupled to a gas flow in a clean room and the dry traps. Tenax traps and wet impingers measure contaminants contained in the gas supply for a determined sampling interval. When the sampling interval is done, the unit is sent to an analysis facility for processing.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: October 7, 2008
    Assignee: Entegris, Inc.
    Inventors: Anatoly Grayfer, Jürgen Michael Lobert, William Goodwin, Frank Vincent Belanger, John E. Sergi, Mark C. Phelps
  • Publication number: 20080202208
    Abstract: A nano-particle containing apparatus, a nano-particle detection system and a method are disclosed. The nano-particle containing apparatus includes a casing, an air extracting device, a pressure device and a measuring instrument. The casing has a containing space for disposing a plurality of nano-particles. An internal wall surface of the casing has active self-cleaning function. The pressure control device controls the pressure status of the containing space. The active self-clean function is that nano-particles adhered to the internal surface wall are removed into the containing space. The nano-particles then are pumped by the air extracting device from the containing space. The measuring instrument then detects the status of an object affected by the nano-particles after the object is delivered into the containing space.
    Type: Application
    Filed: September 21, 2007
    Publication date: August 28, 2008
    Applicant: NATIONAL HEALTH RESEARCH INSTITUTES
    Inventors: CHUNG-SHI YANG, FU-DER MAI, BEGA LIU, JEN-KUN CHEN, YONG-CHIEN LING, FENG-YIN LI
  • Patent number: 7416902
    Abstract: An apparatus for airborne particle sorting is provided comprising a charging system adapted for applying an electrostatic charge to the particles, such that particles of at least a first group are deflected to a greater extent than particles of a second group are deflected. A focusing system is adapted for electrostatically focusing substantially at least the particles of the first group into a focused stream that is narrower than the input air stream. A deposition system is adapted for substantially depositing the particles of the first group from the focused stream upon a target surface, where the target surface may be transported to an analysis system capable of analyzing the particles deposited thereon.
    Type: Grant
    Filed: September 20, 2004
    Date of Patent: August 26, 2008
    Assignee: Sarnoff Corporation
    Inventors: Timothy Allen Pletcher, Peter James Coyle, Joseph Thomas McGinn, David Keller
  • Publication number: 20080190173
    Abstract: The present invention relates to soot sensors based on one-piece strip conductor structures, to methods for measuring soot, and to the use of heat conductor chips for soot measurement. For this purpose, the invention is based on the sensitivity of intensive variables, especially substance-specific variables. According to the invention, an electric soot sensor is provided, in which at least one chip is provided with at least one one-piece strip conductor having, in particular, two terminal panels, and the soot sensor has a soot determination facility that is adapted to determine an intensive or specific change of a surface. The inventive method is characterized by soot deposits causing a change of an intensive variable, especially of a thermospecific or electrical parameter of a chip, and by determination of said variable.
    Type: Application
    Filed: April 20, 2006
    Publication date: August 14, 2008
    Applicant: HERAEUS SENSOR TECHNOLOGY GMBH
    Inventors: Karlheinz Wienand, Matthias Muziol, Tim Asmus, Karlheinz Ullrich, Andreas Ogrzewalla, Dieter Teusch
  • Patent number: 7407531
    Abstract: A system is disclosed for condensation particle counting in conjunction with modifying an aerosol to enhance the formation and growth of droplets of a selected working fluid, preferably water. Before saturation with the working fluid, the aerosol is exposed to an aerosol modifying component, preferably a vapor including molecules that are adsorbed onto surfaces of the particles or other elements suspended in the aerosol. Adsorption alters the surface character of the suspended elements towards increased affinity for the vapor of the working fluid, to promote the formation and growth of working fluid droplets. The droplets are optically detected to indicate numbers and concentrations of the suspended elements.
    Type: Grant
    Filed: May 9, 2005
    Date of Patent: August 5, 2008
    Assignees: TSI Incorporated, California Institute of Technology
    Inventors: Richard C. Flagan, Stanley L. Kaufman, Gilmore J. Sem
  • Publication number: 20080173072
    Abstract: A device is provided for detecting residual gas content inside a gas canister and issuing a warning of gas leakage. The device includes at least one temperature sensor, one pressure sensor, a calculation/processing circuit, an alarm element, a display device, and a power supply. The temperature sensor is arranged in a gas regulator or periphery of a gas range to detect temperature of surrounding and issue a temperature signal. The pressure sensor is arranged at a high-pressure side of the gas regulator to detect the gas pressure from a gas canister and to issue a pressure signal. The calculation/processing circuit is connected to the temperature sensor and the pressure sensor to receive the temperature signal and pressure signal for calculating the residual gas content in the gas canister and identifying gas leakage occurring in pipe lines and the gas regulator and issuing an alarm signal in response to the identification of gas leakage.
    Type: Application
    Filed: November 14, 2007
    Publication date: July 24, 2008
    Inventor: William Home
  • Patent number: 7401498
    Abstract: A detector system that can analyze multiple samples with a single detector. The detector may contain a portal with a first opening and a second opening. A first sample is obtained from the first opening and a second sample is obtained from the second opening. The openings are coupled to a single detector that can analyze both samples.
    Type: Grant
    Filed: March 7, 2005
    Date of Patent: July 22, 2008
    Assignee: Syagen Technology
    Inventors: Jack A. Syage, Karl A. Hanold
  • Publication number: 20080170226
    Abstract: A particle monitor system capable of accurately detecting the number of or the size of particles flowing through an exhaust pipe. In a bypass line through which a chamber is communicated with a dry pump, there is disposed the particle monitor system that includes a laser oscillator for irradiating laser light, a photo multiplier tube having a focal point thereof located at a location where the center axis of the bypass line crosses the laser light, and a particle converging member formed by a circular disk-like member and formed with a through hole facing the focal point FP. A gap is defined between the bypass line and an outer periphery of the particle converging member.
    Type: Application
    Filed: January 4, 2008
    Publication date: July 17, 2008
    Applicant: TOKYO ELECTRON LIMITED
    Inventor: Tsuyoshi MORIYA
  • Publication number: 20080148812
    Abstract: A solid particle counting system for measuring solid particle number concentrations from engine or vehicle exhausts in real-time includes a diluter arrangement, a particle counter, and a flow splitter. The diluter arrangement mixes the dilution gas with flowing sample gases. The flow splitter receives the output flow from the diluter arrangement, provides a portion of this flow to the particle counter, and provides a by-pass flow that is received by a vacuum pump. A second flow route to the particle counter includes a valve arranged such that opening the valve during the starting of the vacuum pump reduces a pressure pulse at the particle counter caused by the starting of the vacuum pump, thereby avoiding work fluid backflow from the particle counter prior to the vacuum pump stabilizing.
    Type: Application
    Filed: December 21, 2006
    Publication date: June 26, 2008
    Inventors: Qiang Wei, Scott T. Porter, Ichiro Asano, Montajir MD. Rahman, Takeshi Kusaka
  • Patent number: 7350398
    Abstract: A smoke sensing device for internal combustion engines comprises an electrode assembly with a heated insulator, a high voltage spark system, a voltage attenuator and a signal conditioning system. The electrode assembly is installed in an engine exhaust pipe so that the spark gap between the electrodes is exposed to the exhaust gas. A series of sparks is produced across the spark gap and the spark voltage is sensed and attenuated to produce a voltage signal. At a selected time during the spark, the voltage signal is compared with a reference voltage. The smoke content of the exhaust gas is derived from the frequency of occurrence of sparks where the voltage signal value is less than the reference value at the selected time. The heated insulator burns off carbon deposits on the insulator surface. The repetitive sparks keep the electrode surfaces free of carbon deposit build-up.
    Type: Grant
    Filed: October 26, 2005
    Date of Patent: April 1, 2008
    Inventor: David Phillip Gardiner
  • Patent number: 7347112
    Abstract: Air sampler with integrated airflow sensing. The air sampler according to at least some embodiments includes an air mover that is operable to move air over a sampling media. An integrated airflow sensor is in fluid communication with the air mover. The air mover operating speed can be adjusted, in example embodiments, by either a feedback control mechanism that is connected to the air mover and the integrated airflow sensor, by user input, or by a combination of the two. The feedback control mechanism adjusts the operating speed of the air mover in response to signaling from the integrated airflow sensor in order to maintain an actual airflow in accordance with a stored, target value. The feedback can, in at least some embodiments, compensate for obstructions, environmental variables, variations in the power supplied to the air mover, and the like.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: March 25, 2008
    Assignee: Environemental Monitoring Systems, Inc.
    Inventor: Charles Gary Kay
  • Patent number: 7343782
    Abstract: A system for testing devices for detecting airborne particulate matter generates a first airflow and a second airflow. The second airflow is filtered to remove ambient airborne particulate matter from the second airflow, and particulate matter to be detected is aerosolized and introduced into the second airflow. The second airflow is sampled by an optical particle counter to determine an amount of particulate matter released into the second airflow. The first and second airflows are combined, and the combined airflows are sampled by one or more detecting devices to be tested. Detection results of the tested detecting devices are compared with the amount of particulate matter released into the second airflow as determined by the optical particle counter to assess the accuracy and functionality of the detecting devices.
    Type: Grant
    Filed: April 10, 2006
    Date of Patent: March 18, 2008
    Assignee: Northrop Grumman Corporation
    Inventors: Kenneth S. Damer, Edmond G. Radcliff
  • Patent number: 7343781
    Abstract: A system for detecting fine liquid, e.g., oil, particles in a gas system having a high pressure compressor and at least two gas handling devices, e.g., a coalescer and at least one adsorber. The detection system uses plural sensors and a monitor unit to detect the presence of such fine liquid particles in various portions of the gas system and to provide alert signals in response thereto. The alert signals can be used by associated valves to control the gas system.
    Type: Grant
    Filed: October 13, 2005
    Date of Patent: March 18, 2008
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Frank Kenneth Schweighardt, David Hon Sing Ying, Dean Anthony Chin-Fatt, Kevin Boyle Fogash, Charles Randall Kayhart
  • Patent number: 7338638
    Abstract: The invention is directed to a trap material use in a chemical trace detection portal for detecting trace amounts of contraband, and more particularly for detecting vapors and particles emitted from drugs and explosive devices. The trap material is made of a metallic foam material, such as aluminum foam metal, copper foam metal, stainless steel foam metal, or a silica-carbon foam metal, which have high thermoconductivity and reduced density, as compared to conventional trap materials, thereby ensuring that the internal temperature of the subject trap rapidly achieves the temperature required during desorbing of the trace materials.
    Type: Grant
    Filed: August 13, 2003
    Date of Patent: March 4, 2008
    Assignee: GE Homeland Protection, Inc.
    Inventors: William J. McGann, Kevin J. Perry, Sherry L. Lepine
  • Patent number: 7334453
    Abstract: A gas sampler includes an impact disc for removing larger particles from a gas flow drawn by a pump and a filter for capturing smaller particles, also positioned in the flow path. The sampler is conveniently dissembled and reassembled to remove and replace the impact disc and the filter. Particles removed, especially on the filter, may be observed or analyzed. The impact disc may be coated with an oil or other viscous substance to enhance its ability to retain larger particles. The flow path may be entirely annular after striking the impact disc—that is, around the outside of the impact disc but a portion of the flow path may proceed directly through a central aperture in the impact disc after striking it.
    Type: Grant
    Filed: August 26, 2005
    Date of Patent: February 26, 2008
    Assignee: SKC, Inc.
    Inventors: Saulius Trakumas, Donald Lee Smith, Charles W. Nachreiner, Peter M. Hall
  • Patent number: 7328603
    Abstract: Systems and methods for the detection of substances (particularly particulate substances) within mail pieces, specifically letters and other “flats” of mail. In particular, the systems and methods are for the detection of residues of Chemical or Biological Warfare Agents (CBWAs) which may be present within the mail pieces. The system is principally designed to be included as part of Dual Pass Rough Cull System (DPRCS) for the collection and detection of the residue when the contaminated mail piece first enters a mail facility and before it is intermingled with other mail pieces. The system also utilizes aerosol chambers using at least two arrays of pinch rollers to provide for decreased incremental changes on mail pieces and decrease the likelihood of mail piece damage.
    Type: Grant
    Filed: January 8, 2007
    Date of Patent: February 12, 2008
    Assignee: Engineered Support Systems, Inc.
    Inventors: James J. Strohmeyer, William Blumfelder, John Tehan, Dennis Osterhorn, Joseph Matteoni, William J. Nelgner, Brian Lybarger, David Schenken, James Wagy
  • Patent number: 7316152
    Abstract: Systems and methods for the detection of substances (particularly particulate substances) within mail pieces, specifically letters and other “flats” of mail. In particular, the systems and methods are for the detection of residues of Chemical or Biological Warfare Agents (CBWAs) which may be present within the mail pieces. The system is principally designed to be included as part of Dual Pass Rough Cull System (DPRCS) for the collection and detection of the residue when the contaminated mail piece first enters a mail facility and before it is intermingled with other mail pieces.
    Type: Grant
    Filed: July 11, 2006
    Date of Patent: January 8, 2008
    Assignee: Engineered Support Systems, Inc.
    Inventors: James J. Strohmeyer, William Blumfelder, John Tehan, Dennis Osterhorn, Joseph Matteoni, William J. Nelgner, Brian Lybarger, David Schenken, James Wagy
  • Patent number: 7275415
    Abstract: A fluid conveyance apparatus having more than one particulate matter sensing probe situated at two or more locations on the apparatus. Signals from the probes from at least two locations may indicate particulate matter flowing within a fluid through the conveyance apparatus. The times between signals may be indicated the rate of movement of the particulate matter in the conveyance apparatus and also a flow rate and direction of the fluid. The sensing probe signals may be processed into control signals that may go to a flow control mechanism. An example application of the flow control mechanism may be for an exhaust gas recirculation system of an engine.
    Type: Grant
    Filed: July 27, 2005
    Date of Patent: October 2, 2007
    Assignee: Honeywell International Inc.
    Inventors: Michael L. Rhodes, Brian C. Krafthefer
  • Publication number: 20070220953
    Abstract: A method of detecting particles during inspection is provided. The method includes establishing a security checkpoint including a detection system, wherein the detection system includes a chamber defining a passage and includes a plurality of jets. The method also includes passing an individual through the passage, enhancing a convection plume including particles from the individual by blowing air through at least one of the plurality of jets, and absorbing the particles in a preconcentrator including a filter encased in a frame having a high thermal conductivity. Moreover, the method includes evaporating the particles absorbed in the preconcentrator and using a detector to determine whether the particles are from at least one of an explosive material and a narcotic substance.
    Type: Application
    Filed: March 16, 2007
    Publication date: September 27, 2007
    Inventors: Kevin Joseph Perry, Matthew Edward Knapp
  • Patent number: 7251982
    Abstract: There is provided apparatus for the measurement of particle mass concentration of an aerosol and which comprises at least one aerosol inlet and at least one electrostatic precipitator which directs an aerosol flow towards a mass sensor on which the particles are collected, the sensor being housed in a magazine including a plurality of other sensors, each of which may be substituted for the sensor, and a control. The control selectively connects one of the at least one aerosol inlet with one of the sensors.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: August 7, 2007
    Assignee: Sensors, Inc.
    Inventor: David R. Booker
  • Patent number: 7222517
    Abstract: A method for determining the characteristic properties of soot particles originating from combustion processes utilizes the determination of the blackening of a filter paper. In order to allow for achieving a quick and relatively accurate determination of the particle sizes, possibly of further characteristics as well, a method of this kind provides that the pressure conditions on the filter paper are established as well. It is advantageous for this purpose to determine the differential pressure on the filter and/or filter paper caused by the deposition of the particles.
    Type: Grant
    Filed: June 4, 2004
    Date of Patent: May 29, 2007
    Assignee: AVL List GmbH
    Inventor: Erich Schiefer
  • Patent number: 7213445
    Abstract: A technique for determining particulate density in a fluid monitors the changes in the speed of sound. Since the speed of sound is intimately related to the composites of the air mixture and since the speed of sound of clean air at any temperature and humidity can be calculated exactly, it is possible to estimate the density of any foreign particulates in the air by observing changes in the speed of sound. Formulations are derived that correlate the change in the speed of sound of the air mixture to their density fluctuations, thus allowing people to estimate the mass density of foreign particulates under any temperature and humidity. Alternatively, the change in density of the air mixture can be detected, thereby indicating the presence of contaminants and a possible alarm, even if the contaminants are not yet identified.
    Type: Grant
    Filed: September 23, 2004
    Date of Patent: May 8, 2007
    Assignee: Wayne State University
    Inventors: Sean F. Wu, Ravinder S. Beniwal
  • Patent number: 7205152
    Abstract: A self-contained closed loop system and method for detecting contaminants in, on, and around objects. The system includes an air duct subsystem connecting at least one sensor to a sealed housing containing a rotating container. Air from the sealed housing is circulated past a sensor to detect, for example, biological or chemical contaminants. If a contaminant is detected, an indicator is set and a contaminant neutralizer is optionally injected into the air duct subsystem.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: April 17, 2007
    Assignee: Lockheed Martin Corporation
    Inventor: John T. Swider
  • Patent number: 7201037
    Abstract: A mail tub in the form of a substantially rigid container and a removable lid which seals the container. The container includes an air inlet port and an air outlet port for sampling air in the mail tub for possible biological contamination, such as anthrax. The container includes structure along the bottom and walls to prevent mail from contacting the walls and bottom. Such structure, in one embodiment, may include raised standoffs along the bottom of the container and channels along the walls to facilitate airflow efficiency through the mail tub when the lid is attached and an air pressure source is applied to the one of the ports. Air samples of the sealed container air are collected for contamination analysis.
    Type: Grant
    Filed: December 9, 2002
    Date of Patent: April 10, 2007
    Assignee: Lockheed Martin Corporation
    Inventors: Robert J. Felice, Patrick J. Fitzgibbons
  • Patent number: 7197911
    Abstract: A particulate mass monitor includes a controller that monitors a change in a resonant oscillation frequency of a taut metallic membrane, as caused by deposition of the particulate matter on the metallic membrane. The metallic membrane, such as a foil or metallized plastic film, is substantially mechanically stable under tension. Application of a tension to the periphery of the metallic membrane generates a substantially constant tension within the membrane, thereby allowing the particulate mass monitor to detect a particulate mass concentration of the air sample with a relatively high degree of accuracy. Additionally, the particulate mass monitor includes a membrane transporter that automatically advances the metallic membrane within the particulate mass monitor. The membrane transporter minimizes the necessity for manual replacement of the metallic membrane over time and allowing long term, unattended operation of the particulate mass monitor.
    Type: Grant
    Filed: January 5, 2005
    Date of Patent: April 3, 2007
    Assignee: Thermo Electron Corporation
    Inventor: Pedro Lilienfeld
  • Patent number: 7191640
    Abstract: Electrical connecting lines of a sensor element are anchored by friction locking, specifically using an annularly closed spring element which clamps the connecting lines against contact surfaces on the sensor element using pressure bodies.
    Type: Grant
    Filed: July 4, 2002
    Date of Patent: March 20, 2007
    Assignee: Robert Bosh GmbH
    Inventors: Helmut Weyl, Juergen Wilde, Dirk Bluemmel, Andreas Pesch
  • Patent number: 7188538
    Abstract: The invention disclosed herein relates generally to mailpieces and more particularly, a hazardous material detector for detecting hazardous material in a mail stream. The present invention is directed, in general to detector for collecting sample (s) of hazardous materials from a mail processing device. The mailpiece generally comprises an envelope comprising a front side and a back side; holes formed in at least one of the front side or the back side of the envelope; a hazardous material test strip for detecting the presence of hazardous material in contact with the test strip; whereby when hazardous materials are detected by the hazardous material test strip a physical change occurs to the hazardous material test strip and the physical change can be viewed through at least one hole formed in the at least one of the front side or the back side of the envelope. The detector helps to quickly determine whether hazardous materials are present in the mail stream.
    Type: Grant
    Filed: September 30, 2002
    Date of Patent: March 13, 2007
    Assignee: Pitney Bowes Inc.
    Inventor: Christian A. Beck
  • Patent number: 7178379
    Abstract: Systems and methods for the detection of substances (particularly particulate substances) within mail pieces, specifically letters and other “flats” of mail. In particular, the systems and methods are for the detection of residues of Chemical or Biological Warfare Agents (CBWAs) which may be present within the mail pieces. The system is principally designed to be included as part of Dual Pass Rough Cull System (DPRCS) for the collection and detection of the residue when the contaminated mail piece first enters a mail facility and before it is intermingled with other mail pieces. The system also utilizes aerosol chambers using at least two arrays of pinch rollers to provide for decreased incremental changes on mail pieces and decrease the likelihood of mail piece damage.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: February 20, 2007
    Assignee: Engineered Support Systems, Inc.
    Inventors: James J. Strohmeyer, William Blumfelder, John Tehan, Dennis Osterhorn, Joseph Matteoni, William J. Nelgner, Brian Lybarger, David Schenken, James Wagy
  • Patent number: 7168292
    Abstract: The apparatus described herein is a miniaturized system for particle exposure assessment (MSPEA) for the quantitative measurement and qualitative identification of particulate content in gases. The present invention utilizes a quartz crystal microbalance (QCM) or other mass-sensitive temperature compensated acoustic wave resonator for mass measurement. Detectors and probes and light sources are used in combination for the qualitative determination of particulate matter.
    Type: Grant
    Filed: May 14, 2004
    Date of Patent: January 30, 2007
    Assignee: The Regents of the University of California
    Inventors: Lara A. Gundel, Michael G. Apte, Anthony D. Hansen, Douglas R. Black
  • Patent number: 7168293
    Abstract: Systems and methods for the detection of substances (particularly particulate substances) within mail pieces, specifically letters and other “flats” of mail. In particular, the systems and methods are for the detection of residues of Chemical or Biological Warfare Agents (CBWAs) which may be present within the mail pieces. The system is principally designed to be included as part of Dual Pass Rough Cull System (DPRCS) for the collection and detection of the residue when the contaminated mail piece first enters a mail facility and before it is intermingled with other mail pieces. The system also utilizes aerosol chambers using at least two arrays of pinch rollers to provide for decreased incremental changes on mail pieces and decrease the likelihood of mail piece damage.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: January 30, 2007
    Assignee: Engineered Support Systems, Inc.
    Inventors: James J. Strohmeyer, William Blumfelder, John Tehan, Dennis Osterhorn, Joseph Matteoni, William J. Nelgner, Brian Lybarger, David Schenken, James Wagy
  • Patent number: 7125437
    Abstract: A method and apparatus for particle collection (30) that is characterized by co-aerosolizing fluids (62) into an air stream (34) containing the particles to be analyzed to significantly enhance their collection and identification efficiency is provided.
    Type: Grant
    Filed: April 14, 2003
    Date of Patent: October 24, 2006
    Assignee: The Johns Hopkins University
    Inventors: Wayne A. Bryden, Peter F. Scholl, Micah A. Carlson, Michael P. McLoughlin
  • Patent number: 7122065
    Abstract: An adapter for use with a low volume PUF sampler is described. The adapter is affixed over the open end of a PUF (polyurethane foam) sample cartridge. Sample tubing is affixed to an aperture in the adapter, and the free end of the sample tubing is then positioned at a desired sample location such as within an aircraft interior. As a vacuum is applied to the PUF cartridge, the adapter allows air collected at the sample point to pass through the tubing and through the interior of the PUF cartridge while preventing air surrounding the PUF cartridge from being drawn into the PUF cartridge except through the sample tubing. In this manner the sample point of a desired air sample can be selected at a point remote from the PUF cartridge. Additionally, use of multiple PUF cartridges and adapters allows the simultaneous collection of separate air samples.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: October 17, 2006
    Assignee: Honeywell International, Inc.
    Inventor: Richard B. Fox
  • Patent number: 7117718
    Abstract: A device for ascertaining a particle concentration in an exhaust gas flow of a combustion device, particularly a diesel combustion device, is provided, which device ascertains very small particle concentrations in the exhaust gas of combustion devices, accompanied by high time resolution. At least one measuring unit is provided for measuring a concentration of an oxidizing agent in the exhaust gas flow, having at least one measuring element sensitive to the oxidizing agent.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: October 10, 2006
    Assignee: Robert Bosch GmbH
    Inventor: Norbert Breuer
  • Patent number: 7114369
    Abstract: Systems and methods for the detection of substances (particularly particulate substances) within mail pieces, specifically letters and other “flats” of mail. In particular, the systems and methods are for the detection of residues of Chemical or Biological Warfare Agents (CBWAs) which may be present within the mail pieces. The system is principally designed to be included as part of Dual Pass Rough Cull System (DPRCS) for the collection and detection of the residue when the contaminated mail piece first enters a mail facility and before it is intermingled with other mail pieces.
    Type: Grant
    Filed: May 9, 2005
    Date of Patent: October 3, 2006
    Assignee: DRS Sustainment Systems, Inc.
    Inventors: James J. Strohmeyer, William Blumfelder, John Tehan, Dennis Osterhorn, Joseph Matteoni, William J. Nelgner, Brian Lybarger, David Schenken, James Wagy
  • Patent number: 7111496
    Abstract: A particulate mass monitor includes two mass sensors, such as an optical sensor (e.g., a light scattering photometer or nephelometer) and a beta radiation attenuation sensor for substantially continuous monitoring of ambient particulate matter. During operation, the first mass sensor references the time-averaged measurement of the second mass sensor such that the second mass sensor calibrates the response of the first mass sensor. If the first sensor is an optical sensor, as it detects the presence of particulate matter within a fluid, the mass concentration measurement (e.g., signal output) provided by the optical sensor is altered using a ratio of concentration measurements of the second mass sensor and the optical sensor. The combined use of the two mass sensors provides accurate mass measurements of ambient particulate matter with a relatively high time resolution.
    Type: Grant
    Filed: April 29, 2004
    Date of Patent: September 26, 2006
    Inventors: Pedro Lilienfeld, Hansgerd Kramer
  • Patent number: 7100422
    Abstract: Systems and methods for the detection of substances (particularly particulate substances) within mail pieces, specifically letters and other “flats” of mail. In particular, the systems and methods are for the detection of residues of Chemical or Biological Warfare Agents (CBWAs) which may be present within the mail pieces. The system is principally designed to be included as part of Dual Pass Rough Cull System (DPRCS) for the collection and detection of the residue when the contaminated mail piece first enters a mail facility and before it is intermingled with other mail pieces. The system also utilizes aerosol chambers using at least two arrays of pinch rollers to provide for decreased incremental changes on mail pieces and decrease the likelihood of mail piece damage.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: September 5, 2006
    Assignee: DRS Sustainment Systems, Inc.
    Inventors: James J. Strohmeyer, William Blumfelder, John Tehan, Dennis Osterhorn, Joseph Matteoni, William J. Nelgner, Brian Lybarger, David Schenken, James Wagy
  • Patent number: 7073371
    Abstract: Systems and methods for the detection of substances (particularly particulate substances) within mail pieces, specifically letters and other “flats” of mail. In particular, the systems and methods are for the detection of residues of Chemical or Biological Warfare Agents (CBWAs) which may be present within the mail pieces. The system is principally designed to be included as part of Dual Pass Rough Cull System (DPRCS) for the collection and detection of the residue when the contaminated mail piece first enters a mail facility and before it is intermingled with other mail pieces.
    Type: Grant
    Filed: May 9, 2005
    Date of Patent: July 11, 2006
    Assignee: DRS Sustainment Systems, Inc.
    Inventors: James J. Strohmeyer, William Blumfelder, John Tehan, Dennis Osterhorn, Joseph Matteoni, William J. Nelgner, Brian Lybarger, David Schenken, James Wagy
  • Patent number: 7072044
    Abstract: Fiber optic particle detector for measurements in a fluid flow, comprising an optical fiber (2,3,12) being acoustically coupled to a mechanical element (11,13,14) adapted to be acoustically coupled to the flow, a fiber optic interferometer (54,56) and a light source (12,51,55) providing light in said optical fiber.
    Type: Grant
    Filed: August 30, 2001
    Date of Patent: July 4, 2006
    Assignee: Optopian AS
    Inventors: Jon Thomas Kringlebotn, Erlend Rønnekleiv, Sverre Knudsen