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Document Title |
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5469369 |
Smart sensor system and method using a surface acoustic wave vapor sensor array and pattern recognition for selective trace organic vapor detection
A method and a system using that method are provided which employ a pattern ecognition algorithm to improve sensitivity in detecting hazardous vapors. The algorithm enables the discrimination of...
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5457333 |
Gas sensor used in leak detectors or alarm units
The invention relates to a gas sensor comprises a precious metal electrode, a semiconductor layer entirely or partly covering the precious metal electrode, a barrier layer having a high potential...
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5455565 |
Fluid monitor system and method using a resonator
A non-invasive, fluid monitor engages an open resonator with a segment of fluid line. The fluid line is disposed such that it and the fluid within become a part of the dielectric loading on the...
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5452234 |
Process environment monitoring system
A process environment monitoring system collects and tests air samples from a number of different sample locations. Each sample is drawn into a sample test chamber into which a beam of infrared...
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5444435 |
Halogen monitoring apparatus
There is disclosed apparatus for monitoring the concentration levels of halogen gas in a gaseous atmosphere as confined in an enclosure over a relatively extended period of time. Such monitoring...
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5438324 |
Gas removal apparatus
An apparatus for exhausting contaminant-laden air from a building area includes a monitoring device for determining when a contaminant level has exceeded a preselected value and which provides an...
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5428964 |
Control for air quality machine
A multi-functional room air conditioning unit that controls both heat and humidity as well as the concentration of airborne particulates. A control unit monitors temperature, humidity and air...
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5426415 |
Breath analyzer for use in automobile ignition locking systems
An improved breath analyzing apparatus for use in an automobile ignition locking system. A breath sample tube receives a breath sample from a user. The breath sample tube is divided into a high...
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5410299 |
Smoke detector
An improved smoke detector in combination with a fan assembly for reducing the likelihood of smoke detector activation by ambient smoke, has a fan with a timer controlling the fan's motor to...
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5406265 |
Remote transmitting fenceline monitoring apparatus
An apparatus placed at the "fenceline" (perimeter) of a site, to detect the possible existence of contaminants within the air and transmit an audio signal to a remote location indicating an...
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5402665 |
Monitoring gaseous oxygen concentration
Apparatus for monitoring gaseous oxygen concentration that includes an oxygen sensor for providing an electrical sensor signal that varies as a function of oxygen concentration at the sensor....
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5400015 |
Filter circuit for a gaseous leak detector
A circuit improvement and method leading to increased leak detection sensitivity is provided for gaseous leak detectors which utilize a hand held probe. The circuit modification provides a high...
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5394094 |
Portable gas sensor utilizing fault protective battery cap
Portable gas sensing devices practicing the present invention include a fault protective battery cap to interrupt flow of battery current exceeding a preselected-threshold level. In normal...
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5382943 |
Remote monitoring unit
A remote monitoring apparatus includes a camera for producing a video signal from a picture of a remote site location being monitored, an image processor for outputting an image signal through an...
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5379026 |
Toxic combustion gas alarm
A carbon-monoxide detector and alarm circuit for alerting occupants of a structure to a presence of a toxic gas. The apparatus utilizes a probe to detect carbon-monoxide within an air duct of a...
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5376924 |
Fire sensor
A fire sensing method and apparatus for detecting a fire based on the detection of a hydrocarbon gas produced before fire ignition and the detection of a second fire indicating phenomenon. Such...
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5371491 |
Multi-functional safety apparatus for use in a bathroom or kitchen
A security apparatus is used in a kitchen or a bathroom for detecting the gas leakage and controlling the water temperature and water level in a bathtub or a container. This apparatus is capable of...
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5369397 |
Adaptive fire detector
The fire detector includes a carbon dioxide sensor and a microcomputer. When the rate of increase of the concentration of carbon dioxide at the sensor exceeds a threshold, an alarm is produced. The...
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5357781 |
Method and apparatus for sampling and detecting gases in a fluid
There is disclosed a method and apparatus for repetitively taking samples of a predetermined quantity of a test gas in a liquid and introducing these samples to a test chamber. Each sample is...
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5351037 |
Refrigerant gas leak detector
A refrigerant gas leak detector for detecting the location of leaks of refrigerant gas such as halogen has a sensing tip with a pair of electrodes across which a relatively high voltage is...
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5347223 |
Gas leak detector sensing tip with interior concentric bores and corona current generation
A gas leak detector that operates on the corona principle having a sensing tip with a pair of electrodes across which a high voltage is provided to generate a corona current through the electrodes....
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5343908 |
Vaporless liquid containment system
A vaporless liquid containment system for storing volatile and other liquids while preventing the formation and escape of vapors. The vessel includes a base and a first membrane, the first membrane...
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5331840 |
Detection of a gas leaked into a liquid which has been sampled from a plurality of spaces
A method for discovering amounts of halogen in a liquid is provided wherein the a reservoir comprising the liquid and suspected halogen is healed to a temperature characteristic of the solubility...
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5331310 |
Amperometric carbon monoxide sensor module for residential alarms
A relatively inexpensive modular component that can be substituted for, or used in conjunction with, an existing smoke detector in a commercially available residential fire-detection alarm...
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5300923 |
Apparatus and method for disabling a smoke detector when using a smoke-emanating apparatus
An apparatus and method for use with a smoke detector that is located in proximity with a stove or similar smoke-emanating article. The smoke detector is enabled by placing the detector near the...
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5281816 |
Method and apparatus for detecting hydrocarbon vapors in a monitored area
A method and apparatus for detecting the presence of a predetermined hydrocarbon vapour of a predetermined concentration in a monitored area by: exposing gas in or from the monitored area to...
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5280802 |
Gas appliance detection apparatus
A first and second sensor and alarm member is mounted relative to a gas appliance, and more particularly to the diverter housing and adjacent a lower portion of the gas appliance for detection of...
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5280273 |
Toxic gas detector system having convenient battery and sensor replacement
A detector system for sensing the presence of a toxic gas, such as carbon monoxide, and sounding an alarm. The presence of the gas is detected by passing light through a biomimetric sensing...
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5276434 |
Carbon monoxide concentration indicator and alarm
A compact portable unit incorporating a noxious gas concentration alarm system and method adapted to setting off an alarm to warn of the presence of a dangerously high level concentration of carbon...
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5264833 |
Automatic leak detector
A method and apparatus are provided for automatically compensating for gain variations, component aging and drift characteristics of an associated circuit when trying to detect a leak. In the...
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5252949 |
Chemical sensor for carbon monoxide detection
A ceramic sensor (12) comprising a thin film (14) of Cu 1 =x Mn 2 -x O 4 -y is provided that quantitatively measures the partial pressure of CO gas in a flowing system (22). The sensor is specific...
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5214412 |
Leak detector method establishing two different threshold levels
A leak detector has a dual sensitivity due to two thresholds, a first established by a standard leak of the test gas representing the smallest leak to be detected, and the second as a fraction of...
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5209275 |
Liquid dispensing apparatus and method by sensing the type of liquid vapors in the receiver
The invention relates to a liquid dispensing apparatus which includes a detecting element for detecting the liquid from the vaporized gas surrounding the remaining liquid in a storage tank to be...
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5198773 |
Non-intrusive gas-level measurement apparatus
A method of determining the percentage gas content of an insulating glass window unit or the like comprises the steps of applying a voltage to opposed panes of the unit, progressively increasing...
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5189392 |
Heating system shut-off system using detector and existing safety switch or fuel valve
A safety apparatus for shutting off a unit having a manually operated power interruption switch upon detecting a predetermined condition. In addition, to power interruption a fluid fuel supply to a...
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5184109 |
Overcharge preventive device for automotive batteries
An overcharge preventive device for an automotive battery charging circuit comprises an odorant sensor 6 for detecting the amount of gas generated from the battery 1 during charging (FIG. 3). A...
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5146209 |
Self-contained apparatus for emergency lighting incorporating alarm systems for fire, gas and the like
A self-contained apparatus for emergency lighting has a light, a detector for gas or the like, which can produce an electric input, and a processor which can receive the electric input and produce...
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5120271 |
Ventilating arrangement for a car, and car provided with the same
A ventilating system for a car includes an exhaust fan, a carbon monoxide detector, and tubes for evacuating air from the interior of the car if carbon monoxide is present in it. The system can be...
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5102392 |
Air detector for use in infusion pump
An air detector according to the present invention utilizes a unitary type sensor for detecting air bubbles or columns in an infusion solution flowing through a tube. Because of a unique design for...
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5095736 |
Portable gas cylinder safety delivery system
The present invention relates to a portable gas cylinder safety containment system removably and operably incorporated with a portable, self powered, toxic gas monitoring system, and both removably...
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5065613 |
Method for the direct presentation of a differential measured quantity in terms of its correct physical unit
A method for the direct presentation of a differential measured quantity, in particular, a differential gas concentration measurement, in terms of its correct physical unit is disclosed. A...
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5066466 |
Apparatus for indicating the presence of toxic substances in air that is supplied to a personnel-occupied space
The present invention relates to a device for indicating toxic substances in air that is supplied to accommodation used for personnel, preferably the cab of a motor vehicle, this having error...
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5060507 |
Method and apparatus for fluid mixture monitoring, constituent analysis, and composition control
A method and apparatus for fluid mixture monitoring and controlling using an acoustic sensing technique by pulsing a fluid sample and a reference fluid in elongated chambers with sound waves...
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5053754 |
Simple fire detector
A fire detector that responds more rapidly than the widely used smoke detectors senses increases in the concentration of carbon dioxide associated with a fire. The build-up of carbon dioxide is...
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5049861 |
Method and system for detecting underground mine fires
A CO based, Diesel discriminating, fire detection system and method is disclosed which significantly reduces the threshold of CO needed to detect a fire in a mine that also contains CO from Diesel...
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5043706 |
System and method for detecting bubbles in a flowing fluid
Reliability of bubble or particle detection in a flowing fluid is improved using a pulsed doppler frequency detector. When an echo signal is received, impliedly indicating the existence of a bubble...
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5034725 |
Semiconductor gas sensor having linearized indications
Atmospheric concentrations of reducing gases are measured and indicated by a gas sensor whose conductivity varies in accordance with variations in the concentration of ambient reducing gases, a...
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4987767 |
Exposive detection screening system
An explosive detection screening system used for the detection of explosives and other controlled substances such as drugs or narcotics. The screening system detects the vapor and/or particulate...
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4964309 |
Portal vapor detection system
A portal vapor detection system for sampling air proximal to the bodies of individuals in which air sampling tubes positioned within movable panels convey a gas flow into an analyzing system. Low...
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4943929 |
Chemical agent monitor and control interface
A chemical monitor interface is generally comprised of three identical ciit boards each linked together through fiber optics. One of the circuit boards is electrically connected to a Chemical Agent...
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