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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 8188442 | Non-radioactive electron capture detector for GC Electron capture detector for use with an effluent stream from a gas chromatograph includes a non-radioactive electron source means and an adjacent ionization chamber in which electron capture take place. The detector comprises two partial chambers, of which one con... | 05/29/2012 |
| 7368726 | Method and apparatus for detecting high-energy radiation using a pulse mode ion chamber A method for measuring high-energy radiation flux includes applying a positive voltage to electrodes in an ion chamber filled with a gas capable of forming charged ions by a high-energy radiation, measuring a positive ion current signal related to ion currents induc... | 05/06/2008 |
| 7266421 | System for controlling lifting and remote handling units located in a confined enclosure The control system is used to control manipulation equipment (41) and carrying equipment (43) confined in a containment (40) inaccessible to operators and to perform maintenance operations related to electronic circuits for onboard equipment enc... | 09/04/2007 |
| 7196336 | Apparatus for injecting plasma gas in atmosphere An apparatus for injecting plasma in the atmosphere is provided, including a plurality of dielectric panels (13a, 13b, 13c), and 13d, which are disposed in parallel at predetermined intervals, a gas supply port... | 03/27/2007 |
| 7157718 | Microfabricated radiation detector assemblies methods of making and using same and interface circuit for use therewith Microfabricated, gas-filled radiation detector assemblies, methods of making and using same and interface circuit for use therewith are provided. The assembly includes a micromachined radiation detector including a set of spaced-apart electrodes and an ionization ga... | 01/02/2007 |
| 7151262 | Radioactive gas measurement apparatus and failed fuel detection system To provide a radioactive gas measurement apparatus that is simply constructed and can efficiently measure Xe-133 in a radioactive gas on-line under the condition that the radioactive gas is mixed with interference N-13, an apparatus is provided for measuring a radia... | 12/19/2006 |
| 7138626 | Method and device for non-contact sampling and detection A system for the stand-off detection of trace amounts of analyte materials such as explosives, chemical warfare agents, toxic industrial chemicals, and the like includes an ion source that is operably connected to an ion collection means and to a sensor. The ion sou... | 11/21/2006 |
| 7126121 | Real-time video radiation exposure monitoring system A real-time video radiation exposure monitoring system comprising a Geiger-Müeller meter and a video camera linked to a computer programmed to display video images from the camera simultaneously with data from the Geiger-Müeller meter. A radio modem provides wirel... | 10/24/2006 |
| 7031133 | Aerosol charge altering device The invention relates to a device for charging or adjusting the charge of gas-borne particles into a defined charge distribution under utilization of corona discharge in the aerosol space. In addition to an appropriate geometry of the charger and the electrodes, the... | 04/18/2006 |
| 7023003 | Ion implanter and method of preventing undesirable ions from implanting a target wafer An ion implanter is provided having an ion source; an AMU analyzing magnet having a fixed radius Ram; an ion extraction voltage source; a communication interface for monitoring implantation parameters; and an equipment server having a data log. The ion im... | 04/04/2006 |
| 6765198 | Enhancements to ion mobility spectrometers An ion trap mobility spectrometer is provided. The ion trap mobility spectrometer employs algorithms to simultaneously detect and analyze both positive and negative plasmagrams. Selectivity is improved by detecting the presence of peaks in both spectra and setting l... | 07/20/2004 |
| 6717153 | Apparatus and methods for monitoring emissions Ions produced by radioactive gases present in air impact on the sensitivity of contamination measuring instruments which detect ions generated by radioactive materials present on an item. Methods and apparatus address this issue by conducting a measurement of ions g... | 04/06/2004 |
| 6455859 | Selective flow path alpha particle detector and method of use A method and apparatus for monitoring alpha contamination are provided in which ions generated in the air surrounding the item, by the passage of alpha particles, are moved to a distant detector location. The parts of the item from which ions are withdraw... | 09/24/2002 |
| 6429020 | Flashback detection sensor for lean premix fuel nozzles A sensor for detecting the flame occurring during a flashback condition in the fuel nozzle of a lean premix combustion system is presented. The sensor comprises an electrically isolated flashback detection electrode and a guard electrode, both of which ge... | 08/06/2002 |
| 6023169 | Electron capture detector ECD with a non-radioactive electron source for generation of ions in a reaction chamber. The reaction chamber consists of two partial chambers, of which one is evacuated and contains the electron source, and the other contains connections for the feeding ... | 02/08/2000 |
| 5920072 | Ionization detector An ionization detector having an upper ionization chamber, a lower ionization chamber, and a radioactive source located in the upper ionization chamber but shielded from the lower ionization chamber by a barrier. A substantially constant fluid stream of d... | 07/06/1999 |
| 5861629 | Method of and device for the quantitative detection of material in a sample Method of quantitatively detecting material in a sample, whereby the material is in the form of submicrometric particles covered by a photoemitting substance, and a device for practicing the method. The material in the sample is heated to a photoemitting ... | 01/19/1999 |
| 5804828 | Method and apparatus for optimizing the sensitivity and linearity of an electron capture detector Electron capture detector for use with an effluent stream from a gas chromatograph includes an ionization cell and a sample inlet system connected to the ionization cell for providing an effluent fluid having a sample concentration therein. In the preferr... | 09/08/1998 |
| 5773833 | Photo-ionization detector for volatile gas measurement A photo-ionization detector (PID) which measures volatile organic gas uses electrically insulated parallel plates to energize a miniaturized gas discharge UV lamp and an energy efficient method to modulate the UV lamp intensity and reduce power consumptio... | 06/30/1998 |
| 5760291 | Method and apparatus for mixing column effluent and make-up gas in an electron capture detector Electron capture detector for use with an effluent stream from a gas chromatograph includes an ionization chamber and a sample inlet system connected to the ionization chamber wherein the sample inlet system effects uniform fluid mixture of the effluent f... | 06/02/1998 |
| 5679958 | Beta particle monitor for surfaces A beta radiation detector which is capable of reliably detecting beta radiation emitted from a surface. An electrically conductive signal collector is adjustably mounted inside an electrically conductive enclosure which may define a single large opening f... | 10/21/1997 |
| 5561344 | Photo-ionization detector for detecting volatile organic gases A photo-ionization detector utilizes an ultraviolet (UV) lamp and is designed for detecting and measuring the concentration of volatile gases flowing between closely spaced parallel electrodes. One of the electrodes is formed to allow photons to pass into... | 10/01/1996 |
| 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 |
| 5539208 | Surface radiation detector A surface radiation detector for sensing low energy ionizing radiation on the surface of an object includes a open window gas proportional counter provided with a compressible skirt surrounding the window in a detection chamber. The compressible skirt is ... | 07/23/1996 |
| 5393979 | Photo-ionization detector for detecting volatile organic gases A photo-ionization detector utilizes an ultraviolet (UV) lamp for detecting and measuring the concentration of volatile gases flowing between closely spaced parallel electrodes. One of the electrodes is made of mesh to allow photons to pass into the space... | 02/28/1995 |
| 5345083 | X-ray detector comprising an improved entrance window An inner side of a radiation entrance window in an X-ray detector is provided with an electrically conductive layer of gold, platinum, irridium or a mixture of these elements. Using such a layer, suitable electrical conductivity, a low radiation absorptio... | 09/06/1994 |
| 5324948 | Autonomous mobile robot for radiologic surveys An apparatus for conducting radiologic surveys. The apparatus comprises in the main a robot capable of following a preprogrammed path through an area, a radiation monitor adapted to receive input from a radiation detector assembly, ultrasonic transducers ... | 06/28/1994 |
| 5317159 | Method of using an electron capture type detector An electron capture type detector for gas chromatography has an ionization vessel containing therein line sources for a radioactive isotope serving as a negative electrode, a collector electrode, a purge gas route, a discharge gas route, and an end of a c... | 05/31/1994 |
| 5298754 | Gas flow Geiger-Mueller type detector and method monitoring ionizing radiation A substantially stable, substantially portable open-window gas flow Geiger-Mueller type detector capable of monitoring ionizing radiation having an electrically conductive chamber with one or more fluid inlets and opening to receive radiation. A counting ... | 03/29/1994 |
| 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 |
| 5254861 | Biological aerosol particle detector and method having an electronic pulse detection means System and method for detection and measurement of airborne biological aerosol particles in a gaseous sample are described comprising a source of low energy radiation for irradiating the gaseous sample whereby biological particles in the sample are ionize... | 10/19/1993 |
| 5200614 | Ion mobility spectrometers An ion mobility spectrometer is provided which employs an electron capture process. A sample gas stream is irradiated to produce positive ions and electrons in an ionization chamber. An open grid electrode is employed in the ionization chamber to maintain... | 04/06/1993 |
| 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 |
| 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 |
| 5126676 | Gas amplified ionization detector for gas chromatography A gas-amplified ionization detector for gas chromatrography which possesses increased sensitivity and a very fast response time. Solutes eluding from a gas chromatographic column are ionized by UV photoionization of matter eluting therefrom. The detector ... | 06/30/1992 |
| 5028544 | Method of analysis of organic compounds in chromatography and apparatus for performing this method The objects of the invention are attained in an apparatus for performing a method of analysis of organic compounds in chromatography, comprising a chromatographic column sealingly connected with the housing of a surface ionization detector having coaxiall... | 07/02/1991 |
| 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 |
| 4880983 | High pressure xenon ionization detector A method is provided for detecting ionization comprising allowing particles that cause ionization to contact high pressure xenon maintained at or near its critical point and measuring the amount of ionization. An apparatus is provided for detecting ionization,... | 11/14/1989 |
| 4879472 | Multiplexed electronically programmable multimode ionization detector for chromatography Method and apparatus for detecting and differentiating organic compounds based on their electron affinity. An electron capture detector cell (ECD) is operated in a plurality of multiplexed electroncially programmable operating modes to alter the detector ... | 11/07/1989 |
| 4870281 | Gas-filled X-ray detector The anode connections in a gas-filled X-ray detector are mounted so as to extend transversely of the anode wire so that a substantial saving as regards space is achieved. In order to reduce field inhomogeneities in the ionization space, there may be provi... | 09/26/1989 |
