Matches 1 - 50 out of 228 1 2 3 4 5 >


Match Document Document Title
8944679 Electrode member, electron energy analyzer, photoelectron energy analyzer, and temperature measuring apparatus  
An electrode member has a plurality of spherical electrode sections wherein the radiuses of the spherical sections are different from each other. The spherical electrode sections are disposed in a...
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),...
6953936 Ionization type smoke sensing chamber  
A modular smoke detector has a sensing electrode carried by an insulator module. The insulator module also carries an ionization source and a field effect transistor. The insulator module...
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...
6292105 Thermal ionization detector  
An ionization chamber that detects changes in temperature of electrical insulation with a corresponding change in voltage. This voltage change can be relayed through an operational amplifier and a...
6153884 Radioisotope proximity sensor  
A radioisotope proximity sensor is provided for detecting proximity or distance to a nearby object containing a small radiation source complementary to the sensor. The output of the sensor is...
6057774 Smoke alarm with anti-dust screen  
Smoke alarms that incorporate dust repelling screens exhibit improved performance with fewer false alarms. Effective screens include conductive strands combined with non-conductive elements.
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...
5879947 Apparatus and method for detecting DMAH using particle sensing detector  
A method for detecting dimethylaluminumhydride (DMAH) comprises sensing the aluminum oxide particles produced by the reaction of the DMAH with air (or with a small amount of oxygen). This is...
5856784 Low profile ionization chamber  
A very low profile ionization chamber provides increased operating current by using alpha particle emitting isotopes having low emission energies as an ionization source. The chamber includes a...
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...
5633501 Combination photoelectric and ionization smoke detector  
An ionization chamber for use in a smoke detector includes first and second outer electrodes and a non-reflective center electrode. The non-reflective center electrode can be formed as a metal...
5485144 Compensated ionization sensor  
A compensated ionization-type sensor includes spaced apart active and reference electrodes. A center electrode is disposed between the active reference electrodes. A compensating electrode is...
5399864 Ionization type smoke detector  
An ionization type smoke detector includes a detector body, a printed circuit board on the upper surface of the detector body, an electrode mount on the upper surface of the printed circuit board,...
5347139 Dual energy tracer quantitative analysis  
Using storage phosphor recording media, two exposures are made of a sample containing two target substances tagged with different radiative emitters, for example 32-P and 35-S. The first exposure,...
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,...
5243330 Fire detector system and method  
A fire detector system including ionization smoke detectors (7) is provided with improved false-alarm protection. The system includes an ionization chamber (1) with a radioactive source (10),...
5237281 Ion drag air flow meter  
An ion drag air flow meter (10) including a gas ionizer (16), an ion collector (14) and apparatus (30) for converting the collected ions into a signal providing an indication of the flow of a gas...
5212470 Supervised fire alarm system  
A fire alarm system having increased immunity to false alarms comprises control and indicating means (6) and a plurality of ionization smoke detectors (7) connected through signal lines (8, 9, 14)...
5160916 Ionization type smoke sensor  
An ionization-type smoke sensor having a 2-chamber 1-radiation source structure including an inner electrode having a radiation source, an intermediate electrode having an opening through which...
4868546 Radon detector  
A portable electronic instrument for detecting radon gas is provided by this invention. The presence of radon gas may be reliably and quantitatively measured with simple and inexpensive...
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,...
4853544 Heat-resistant case for an ionization-type smoke detector and method of making the same  
An ionization-type smoke detector having a heat-resistant metal case forming the outer electrode and, with an attached rear cover, enclosing the upper portion of an insulating base board. The...
4845474 Smoke and fire detector  
An ionization smoke and fire detector comprises a molded plastic housing that includes a nodal ring for supporting a vibrating plate that is part of an alarm. The alarm may be driven by...
4761557 Ionization-type smoke detector  
In order to provide an ionization-type smoke detector, wherein the radiation from a radioactive source mounted on the inner electrode disposed within the inner ionization chamber also reaches into...
4755682 Ionization monitor with improved ultra-high megohm resistor  
An ionization monitor measures extremely small currents using a resistor containing a beta emitter to generate ion-pairs which are collected as current when the device is used as a feedback...
4740703 Ionization-type smoke detector  
In an ionization-type smoke detector wherein inner, intermediate and outer electrodes are supported on an insulating base, an inner ionization chamber and an outer ionization chamber being...
4705947 Pulsed helium ionization detection system  
A helium ionization detection system is provided which produces stable operation of a conventional helium ionization detector while providing improved sensitivity and linearity. Stability is...
4704536 Gas sensor and gas detecting method  
A gas sensor and a method for detecting a small amount of a gas such as CO contained in air entering a space between electrodes ionized by a radiation source. At least one radiation source is...
4684807 Flow contoured electron capture detector cell  
A small volume electron capture detector has a cylindrical cell 120 inside which there is provided a generally funnel-shaped insert structure 130 having a cup-shaped section and a cylindrical...
4667106 Fire identification and discrimination method and apparatus  
In a method and apparatus for determining the fuel of a fire, an ionization detector is positioned to detect the ionization level in the fire gases. The natural logarithm of the ratio of the...
4651008 Sample inlet system for an electron capture detector  
An electron capture detector for use with a capillary column is provided with a sample inlet comprising a tubular anode through which sample molecules and a make-up gas are introduced into the...
4631412 Ionization smoke detector  
In a smoke detector of the ionization type having inner, auxiliary and outer electrodes providing inner and outer ionization chambers disposed one within the other, the electrodes and the...
4618777 Outer electrode with improved smoke entry  
An outer electrode for a combustion products detector comprising a cylindrical body including a plurality of first slats alternating with a plurality of second slats, the first slats being...
4600314 Smoke detector cutoff timer  
A mountable remote cutoff timer for a smoke detector that is powered by a battery and includes a timer that is operatively connected to the battery, a light emitting device for indicating improper...
4564762 Smoke detector  
An ionization detector unit for use in a smoke detector includes a housing wall enclosing an ionization chamber, the wall having openings for passage of air through the chamber, the frontal...
4513202 Self compensating fire detection device  
A device employing ionization principles for fire detection disclosing a configuration which allows compensation for adverse effects due to the flow of the gas through the device or due to the...
4488044 Ionization chamber for smoke detector and the like  
An ionization smoke detector is disclosed in which an electric field is established in an ionization chamber which includes an outer cup-shaped electrode defining the chamber and having side wall...
4471346 Smoke detector  
A portable, battery powered smoke detector in which the operative components are compactly and efficiently arranged in such a manner that they may be housed in a pocket-sized casing approximating...
4469953 Combination ionization and photoelectric smoke detector  
A combination type smoke detector comprising a light scattering smoke detector and an ionization smoke detector in which a labyrinth structure dark chamber for the light scattering smoke detector...
4456907 Ionization type smoke detector with test circuit  
An ionization detector of the type having a housing with electrodes and a radiation source for causing ion current flow between the electrodes, collector means for detecting, by a change in...
4455553 Smoke detector of the ionization type  
An ionization type smoke detector (10) includes a chamber having a measuring electrode (12), the voltage on the measuring electrode being a function of the concentration of smoke in the chamber,...
4445038 Apparatus for simultaneous detection of positive and negative ions in ion mobility spectrometry  
An ion mobility detector has dual drift regions respectively on either side of a centrally located reaction region and respectively separated therefrom by dual shutter grids. Each drift region...
4439683 Ionization smoke detector  
An ionization smoke detector having a sensing chamber and including: a screen or mesh electrode enclosing and forming the outer limits of said sensing chamber, while fully exposing said sensing...
4423411 Ionization type fire detector  
A single chamber ionization-type fire detector. The ionization current is directly amplified to provide a usable analogue signal by means of an operational amplifier which has a minimal effect in...
4401979 Electrical controls for ionization smoke detector  
An ionization smoke detector device including means for insuring that adjustment can be made in the triggering potential for the alarm device so that should circumstances change, an operator can...
4396840 Ionization type smoke sensing device  
An ionization type smoke sensing device includes a printed board. An inner electrode made of heat-resistant metal is attached to the printed board and a radioactive source is fixed to the inner...
4383253 Ionization smoke detector  
The detector comprises a first electrode defined by a bolt mounted on an annular insulator which in turn is mounted on a printed circuit board and a second electrode defined by a cup shaped member...
4379290 Alarm device with a condition sensor element  
In an alarm installation containing a central evaluation unit and alarm devices arranged remotely therefrom, the transmission of energy from a radiation source and the reporting back of the signal...
4364031 Ionization smoke detector with increased operational reliability  
An ionization smoke detector containing at least one ionization chamber operated at an extra low voltage or potential. The ionization chamber contains a sensor employing a measuring electrode and...

Matches 1 - 50 out of 228 1 2 3 4 5 >