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| Number | Title | Issue Date |
| 4045729 | Gas detector A gas detector for sensing the presence of a gaseous medium consisting of a helical coil for connection to a dc power source for generating both an electromagnetic field and radiant heat. The coil is wrapped around a tubular sleeve constructed of a sensin... | 08/30/1977 |
| 4043178 | Hydrogen probe system A hydrogen probe system measuring hydrogen gas produced in the corrosion of steel, both in volume and rate, with a relatively simple construction, rapid installation at any location and trouble-free operation for extended periods of time without supervisi... | 08/23/1977 |
| 4032856 | Drift compensated amplifier, particularly for measuring signals A gas analyzer has an output amplifier circuit which is drift compensated in that zero volts are established across a gain network for a particular low point measuring signal as the amplifier provides an output on the basis of a particular bias, while the... | 06/28/1977 |
| 4013943 | Solid state electrolytic cell gas sensor head A Solid State Electrolytic Cell Gas Sensor is presented which is capable of measuring various toxic or combustible gases in low concentrations (0-5 PPM) up to and including high concentrations such as 0-20 percent by volume. The sensor exhibits excellent ... | 03/22/1977 |
| 4004452 | Air/fuel ratio sensor for air/fuel ratios in excess of stoichiometry The present invention provides a sensor which is operative to sense the partial pressure of oxygen in the exhaust gases of combustion processes having air/fuel combustion mixture ratios in excess of the stoichiometric ratio. The sensor according to the pr... | 01/25/1977 |
| 4001758 | Stoichiometric air/fuel ratio exhaust gas sensor A stoichiometric air/fuel ratio exhaust gas sensor construction particularly useful with variable resistance partial pressure of oxygen responsive sensor material is disclosed. A generally cylindrical mounting body, formed of corrosion resistant material,... | 01/04/1977 |
| 4000089 | Element for detecting carbon monoxide This invention relates to an element which can detect selectively carbon monoxide from other reducing gases contained in air. The element has a sensitive response to carbon monoxide at a comparatively low temperature and not to other reducing gases. The e... | 12/28/1976 |
| 3997297 | Method and apparatus for detecting a constituent in an atmosphere A method and apparatus for detecting the presence of a particular constituent in a sampled atmosphere. The sample is drawn through two substantially identical flow paths, each path containing a detector. The conditions prevailing in one of the flow paths ... | 12/14/1976 |
| 3991360 | Sensor assembly for a halogen gas leak detector A sensor assembly for a halogen gas leak detector characterized by including a tubular, porous, high purity Alumina (Al2 O3) element for supporting electrode and heater components in spaced-apart relationship relative to one another ... | 11/09/1976 |
| 3979625 | Ceramic spaced sensor assembly for a gas leak detector A sensor assembly for a halogenated gas leak detector is characterized by having a porous ceramic spacer element positioned around a central electrode and around portions of the turns of a helical heater coil in order to hold these component parts and the... | 09/07/1976 |
| 3964292 | Gas detecting apparatus and methods Apparatus and methods are disclosed for detecting a particular gas occurring at any point along a path through a given environment. A tubing having a wall through which the particular gas readily permeates is provided for placement along the path of inter... | 06/22/1976 |
| 3959764 | Gas analyzing element A catalytic combustion-type, gas sensing, resistive element and the method of making it by forming an electrical conductor, whose electrical resistance varies with temperature, into a helical coil, coating the coil with a refractory material whose coating... | 05/25/1976 |
| 3955929 | Gas detecting sensor Gas detecting sensor made of SnO2 characterized by containing less than 5% by weight of at least one of Al2 O3, ZnO, SrO and BaO and less than 1% by weight of chlorine. The gas detecting sensor has a high sensitivity selec... | 05/11/1976 |
| 3955268 | Method of fabricating an electrolytic cell gas sensor A Solid State Electrolytic Cell Gas Sensor is presented which is capable of measuring various toxic or combustible gases in low concentrations (0-5 PPM) up to and including high concentrations such as 0-20 percent by volume. The sensor exhibits excellent ... | 05/11/1976 |
| 3953173 | Gas-sensor element and method for detecting oxidizable gas A gas-sensor element for detecting oxidizable gases and vapors such as alcohols for carbon monoxide, which is characterized by comprising a complex metal oxide having the K2 MgF4 -type crystal structure and represented by the general... | 04/27/1976 |
| 3952567 | Gas sensor A gas sensor comprising as a gas sensible material a spinel-type ferrite represented by the general formula AFe2 O4 in which A stands for at least one member selected from the group consisting of Li, Mg, Mn, Fe, Co, Ni, Cu, Zn and Pb... | 04/27/1976 |
| 3950980 | Vapor sampling device A device for measuring the presence or time-average amounts of at least one selected gas in a mixture thereof which comprises an enclosure having therewithin at least one substance which interacts with the gas to be monitored. Attenuating means associated... | 04/20/1976 |
| 3951603 | Gas-sensor element and method for detecting reducing gas or oxygen gas A gas-sensor element for detecting reducing gases and vapors such as alcohols or carbon monoxide, or for determining oxygen concentration, which is characterized by comprising a complex metal oxide having a perovskite-type crystal structure and represente... | 04/20/1976 |
| 3933028 | Air/fuel ratio sensor for air/fuel ratios in excess of stoichiometry The present invention provides a sensor which is operative to sense the partial pressure of oxygen in the exhaust gases of combustion processes having air/fuel combustion mixture ratios in excess of the stoichiometric ratio. The sensor according to the pr... | 01/20/1976 |
| 3933029 | Gas detector with automatically operable fan switch A gas detector, comprises a housing having an interior cavity with a wall having a testing tube receiver with an opening therethrough into the cavity. Spaced above the wall and in alignment therewith, is a test tube receiving tube and, when a test tube is... | 01/20/1976 |
| 3932246 | Gas sensor and method of manufacture A gas sensor, and its method of manufacture, particularly useful as an exhaust gas sensor for an internal combustion engine air/fuel ratio system, is disclosed. The sensor is comprised of a sintered ceramic body of transition metal oxide, such as titania,... | 01/13/1976 |
