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| Number | Title | Issue Date |
| 7745799 | Detector for aiborne alpha partice radiation In the field of protection from ionising alpha particle radiation there is a need for a low cost, reliable, maintenance free, and self-contained detector that can monitor continuously over a plurality of time periods the levels of airborne alpha particle radiation. ... | 06/29/2010 |
| 7642520 | Method for measuring randon and thoron in air A novel method for measuring airborne radon and thoron capable of separately measuring radon and thoron with high sensitivity, having a small-sized device structure, and free of the influence from its measurement environment. In the method, by measuring Cherenkov li... | 01/05/2010 |
| 7462836 | Method and system to separate and measure Ar quickly The present invention relates to the method and equipment for inspecting nuclear experimental locales, and particularly relates to the method and system for separating and measuring 37Ar quickly. The method of the invention comprises the steps of sampling... | 12/09/2008 |
| 7402800 | Method and device for the continuous determination of damage to systems used for the post-treatment of heat engine exhaust gases The invention relates to a method for the continuous determination of the damage to at least one system (7) used for the post-treatment of exhaust gases from an internal combustion engine (2), caused by the lubricating oil, the fuel and/or at least one... | 07/22/2008 |
| 7352844 | Method and system for automatically scanning and imaging the contents of a moving target The system and method described herein facilitate back-to-back automatic scanning of moving vehicles without have the vehicles stop in the scanning zone. The system includes a scanning zone that comprises a radiation source and a radiation source detector. The syste... | 04/01/2008 |
| 7337686 | Multi-threat detection system A method and system for efficiently screening for dangerous threatening items are presented. The system includes an object unit designed to hold the object and a test unit including equipment for subjecting the object to a combination of two or more tests. There are... | 03/04/2008 |
| 7317185 | Tamper resistant radon detector Embodiments of the present invention provide for a tamper resistant radon detector monitoring system. Other embodiments may be described and claimed. ... | 01/08/2008 |
| 7312439 | Radon progeny monitor A new type of radon progeny monitor called an electret radon progeny integrating sampling unit (E-RPISU) using an electret ion chamber to measure radon progeny concentration. A conventional 1 LPM particulate air sampling system is used to collect the radon progeny o... | 12/25/2007 |
| 7262704 | Information handling system including dust detection An information handling system (“IHS”) including an enclosure is provided. A dust detection circuit, located inside the enclosure, is also provided. The dust detection circuit determines whether an amount of dust present inside the enclosure is greater than a pr... | 08/28/2007 |
| 7242020 | Real-time monitoring of particles in semiconductor vacuum environment An apparatus includes semiconductor processing equipment. A particle detecting integrated circuit is positioned in a vacuum environment, the particle detecting integrated circuit containing a device having a pair of conductive lines exposed to the vacuum environment... | 07/10/2007 |
| 7196631 | Method of utilizing existing fire alarm systems and existing smoke detectors to detect aerolized radioactive material A method of utilizing existing fire panel infrastructure to fight terrorism. The fire alarm systems ionization type smoke detectors, in addition to detecting the presence of smoke, would also detect the presence of airborne radioactive particles by effecting only a ... | 03/27/2007 |
| 7152002 | Method and apparatus for analysis of elements in bulk substance A substance analyzer utilizing Prompt Gamma Neutron Activation Analysis for identifying characteristics of a substance and method of manufacturing the same are disclosed. The analyzer is small enough to be portable and to allow its use in many applications where cur... | 12/19/2006 |
| 7038203 | Method for observing high-altitude neutral air and device for observing high-altitude neutral air Ion particles are discharged so as to be influenced by a magnetic field originated from the earth, and collided with high-altitude neutral air to generate high velocity neutral particles through charge exchange. The high velocity neutral particles are analyzed. The ... | 05/02/2006 |
| 6768116 | Real-time remotely programmable radioactive gas detecting and measuring system A system is presented for remotely measuring a concentration of a target material (e.g., radioactive gas, suspended aerosols or non-radioactive gaseous chemistries). The system includes a data processing system and a monitoring device. The device includes a detector... | 07/27/2004 |
| 6734433 | Inonization chamber, measuring sequence for the activity of a gas emitting radiation β and method using same The present invention concerns an ionization chamber cylindrical in shape comprising an anode (35) formed by a central rod in current-carrying material and a cathode (38) in current-carrying material around the said anode, both connected to two element... | 05/11/2004 |
| 6365901 | Relating to monitoring ion sources The apparatus and method provide techniques for monitoring the position on alpha contamination in or on items or locations. The technique is particularly applicable to pipes, conduits and other locations to which access is difficult. The technique uses in... | 04/02/2002 |
| 6331707 | Electrostatic monitoring The apparatus and method provide a technique for more simply measuring alpha and/or beta emissions arising from items or locations. The technique uses indirect monitoring of the emissions by detecting ions generated by the emissions, the ions being attrac... | 12/18/2001 |
| 6288400 | Portable apparatus for the measurement of environmental radon and thoron The radometer is a portable instrument for the measurement of the concentration of atmospheric radon/thoron in a test area. A constant velocity pump pulls the air from the outside at a constant flow rate. If the air is too moist, some or all of the sample... | 09/11/2001 |
| 5550381 | Event counting alpha detector An electrostatic detector for atmospheric radon or other weak sources of alpha radiation. In one embodiment, nested enclosures are insulated from one another, open at the top, and have a high voltage pin inside and insulated from the inside enclosure. An ... | 08/27/1996 |
| 5525804 | Background canceling surface alpha detector A background canceling long range alpha detector which is capable of providing output proportional to both the alpha radiation emitted from a surface and to radioactive gas emanating from the surface. The detector operates by using an electrical field bet... | 06/11/1996 |
| 5514872 | High gas flow alpha detector An alpha detector for application in areas of high velocity gas flows, such as smokestacks and air vents. A plurality of spaced apart signal collectors are placed inside an enclosure, which would include smokestacks and air vents, in sufficient numbers to... | 05/07/1996 |
| 5319208 | Forced air flow radon detector having electrically conductive inlet and exhaust filter A radon gas detector comprises a housing having an air inlet port leading to an interior, a radiation detection (e.g. alpha particle measurement) chamber and an air exhaust port leading from the interior chamber to the exterior of the housing. The chamber... | 06/07/1994 |
| 5311025 | Fan-less long range alpha detector A fan-less long range alpha detector which operates by using an electrical field between a signal plane and the surface or substance to be monitored for air ions created by collisions with alpha radiation. Without a fan, the detector can operate without t... | 05/10/1994 |
| 5281824 | Radon detection A detector for atmospheric radon using a long range alpha detector as its sensing element. An electrostatic filter removes ions from ambient air, while allowing radon atoms to pass into a decay cavity. Here, radon atoms are allowed to decay, creating air ... | 01/25/1994 |
| 5194737 | Single and double grid long-range alpha detectors Alpha particle detectors capable of detecting alpha radiation from distant sources. In one embodiment, a voltage is generated in a single electrically conductive grid while a fan draws air containing air molecules ionized by alpha particles through an air... | 03/16/1993 |
| 5192868 | Proportional counter detector A proportional-type detector for the detection of low levels of radioactivity, such as alpha and beta particles generated by radioactive materials. In the preferred embodiment, this detector has a pancake-shaped cavity with a disk-shaped base and a cylind... | 03/09/1993 |
| 5187370 | Alternating current long range alpha particle detector An alpha particle detector, utilizing alternating currents, whcih is capable of detecting alpha particles from distinct sources. The use of alternating currents allows use of simpler ac circuits which, in turn, are not susceptible to dc error components. ... | 02/16/1993 |
| 5184019 | Long range alpha particle detector An alpha particle detector capable of detecting alpha radiation from distant sources. In one embodiment, a high voltage is generated in a first electrically conductive mesh while a fan draws air containing air molecules ionized by alpha particles through ... | 02/02/1993 |
| 5055674 | Electret ionization chamber for monitoring radium and dissolved radon in water An electret ion chamber based radon monitor is employed as a method of measuring radium-226 and dissolved radon-222 concentrations in water. The procedure consists of taking a known volume of water and placing it in a container of known volume and determi... | 10/08/1991 |
| 4990786 | Method and apparatus for determining the actual artificial aerosol alpha activity concentration in the air The Alpha Energy Range Discrimination (AERD) method employs first and second proportional counter tubes separated by a foil and an electronic evaluation system, and comprises the following steps: (a) a filter is disposed in the stream of air flow and is thereb... | 02/05/1991 |
| 4972081 | Detection of contaminants in air A sensitive alpha radiation detector, not responsive to beta or gamma radiation, is provided in an air contamination system to respond to small levels of radon such as 4 picocuries per liter of air. Thus a substantially instantaneous detector for radon in... | 11/20/1990 |
| 4924098 | Nuclear radiation level detector A nuclear radiation level detector includes an ionization chamber. Within the ionization chamber are spaced electrodes. The space between the electrodes communicates with the atmosphere so as to expose the electrodes to the atmosphere. A voltage source ap... | 05/08/1990 |
| 4864141 | Smoke detector with ionization chamber A smoke detector is provided having an ionization chamber (1). For counterbalancing the removal of ions (51), taken out of the chamber by the violent air currents (C) passing through this chamber, these air currents are previously enriched with... | 09/05/1989 |
| 4820925 | Room air monitor for radioactive aerosols A housing assembly for use with a room air monitor for simultaneous collection and counting of suspended particles includes a casing containing a combination detector-preamplifier system at one end, a filter system at the other end, and an air flow system... | 04/11/1989 |
| 4788430 | Contamination and irradiation measuring method and a universal sensor for implementing said method A method is provided for contamination and irradiation measurement and a universal sensor for implementing said process. The individual portable sensor of the invention includes an electret a first face of which is at least partially in contact with the f... | 11/29/1988 |
| 4700067 | Apparatus for checking atmospheric pollution due to alpha particle emitting aerosols Apparatus for checking atmospheric pollution by alpha particle-emitting aerosols includes a filter, a detector positioned facing the filter and a unique grid positioned between the filter and the detector. The grid is constituted by radial plates perpendi... | 10/13/1987 |
| 4633086 | Input circuit for infrared detector A method and circuit are provided for interfacing an infrared detector to a common power supply and signal processing circuitry. A multichannel input circuit including a plurality of buffer circuits and a common bias network is formed on a single semicond... | 12/30/1986 |
| 4626692 | Apparatus for detecting iodine isotopes An apparatus for detecting iodine isotopes in the exhaust gas of a nuclear installation includes a duct for a partial exhaust gas stream, which duct includes an absorption chamber which is disposed in a radiation shielding structure and through which the ... | 12/02/1986 |
| 4607165 | Process and apparatus for detecting atmospheric contamination by alpha particle aerosols Process for the detection of atmospheric contamination by alpha particle aerosols eliminating the background noise due to radon daughter nuclei, of the type consisting of collecting, by circulation of the atmospheric air, the alpha particles to be detecte... | 08/19/1986 |
| 4590372 | Measuring arrangement for determining the gaseous radioiodine concentration in a carrier gas Measuring arrangement for determining the concentration of gaseous radioiodine in a carrier gas, composed of a mass of sorption agent for separating the gaseous radioiodine from the carrier gas and for accumulating the separated radioiodine, with a part o... | 05/20/1986 |
