Matches 351 - 400 out of 520 < 1 2 3 4 5 6 7 8 9 10 11 >
Match Document Document Title
4933669 Aerosol, vapor and liquid chemical agent detector with extending sensor plate  
A chemical agent detector having a pair of vapor/aerosol chemical agent dctor cells mounted with a lithium battery in a detection cell module. A liquid agent detector having a hinged plate is...
4916437 Gas monitoring system with leak detection and flow cutoff  
A gas monitoring system for a kitchen environment in a house and the like which is supplied with gas from a pressurized gas container or from a public gas supply to sense a possibly occurring gas...
4914424 Oxygen concentration monitor using galvanic cell type oxygen sensor  
The invention discloses an oxygen concentration monitor using a Galvanic cell type oxygen sensor. An automatic calibration circuit always calibrates the maximum output of the sensor as the value...
4905498 Gaseous detection system  
A gaseous detection system for detecting the existence of a certain gas and further the detection of a certain level or percentage of that certain gas within a certain environment. An example is...
4896526 Continuous monitoring of a gas mixture  
A method and an apparatus for the continuous monitoring of a gas mixture which contains explosive gases, for example in drying furnaces of painting or coating plants, with the concentration of the...
4893113 Gas alarm and detoxification heating systems  
A single assembly of a water heating system for heating the water and air in a room, and an electrochemical reactor which activates a gas alarm for human safety upon detection of a predetermined...
4891629 Binary gas analyzer instrument and analysis method  
A binary gas analyzer instrument and analysis method for determining percent composition of a cooling gas within a turbine generator is disclosed. The instrument includes a measurement block having...
4882928 Refrigeration efficiency monitoring system  
The disclosure is directed to a device for monitoring the thermodynamic state of a fluid flowing through a conduit. The device generally comprises a first electromechanical transducer acoustically...
4883643 Oxygen sensor protected against contaminants  
An electrolytic oxygen sensor in which the atmosphere is admitted to one side of the solid electrolyte through an air-permeable spacer through a dual concentric tube structure. Holes are formed in...
4884065 Monitor for detecting tube position and air bubbles in tube  
A device for use to detect air in a fluid line between a medication infusion reservoir such as an IV bottle or bag and an IV injection set or a medication infusion pump is disclosed which utilizes...
4882576 Remote combustible gas sensor  
A combustible gas sensor with a calibration test adaptor. A standard combustible gas sensor attached to a transmitter in transmitter housing has a body portion attached thereto which is adapted to...
4879546 Ultrasonic hand-held refrigerant leak detector  
Hand-held apparatus for detecting presence of halogen refrigerant agents in air in which a pair of ultrasonic transducers are spaced from each other within a measurement probe and test air is...
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 immediately...
4866439 Explosives detection system for an aircraft  
An explosives detection system for an aircraft to deter terrorist activity in which a plurality of explosives detectors are located about the interior passenger compartment of the aircraft in order...
4860223 Carbon monoxide health hazard monitor  
An instrument for use on a marine vehicle including a sensor for determining the concentration of carbon monoxide (COC) present on the vehicle, an LED indicator for visually displaying the...
4859024 Optical fiber cable with tampering detecting means  
An optical fiber cable with optical fibers surrounded by a first gas blocking layer which is surrounded by a second gas blocking layer spaced from the first layer so as to provide longitudinal gas...
4847594 Sensor for detecting the exhaustion of an adsorbent bed  
A sensor includes a vapor sensitive medium and a means for monitoring at least one property of the vapor sensitive medium. The vapor sensitive medium is chosen such that it exhibits a response to...
4838323 Misfuelling prevention device and method  
A system for preventing the accidental addition of automotive diesel fuel to the fuel tank of a gasoline fuelled vehicle at retail filling stations. The vapor pressure in the tank to be filled is...
4839014 Cleaner assembly, humidifier, gas alarm and detoxification system  
A single assembly of an air processing structure member for air cleaning and humidifying, and an electrochemical reactor which activates a gas alarm for human safety upon detection of a...
4837570 Ignition delay vapor expulsion module  
An ignition delay vapor expulsion module is provided for accessory use with a boat. When activated, the module energizes an accessory ventilating fan for a predetermined time period. After this...
4831332 Continuous adjusting apparatus for detecting gaseous impurities with a corona discharge  
An apparatus for continuously adjusting the corona discharge currrent of a pair of electrodes exposed to an atmosphere of gaseous impurities, particularly halogen. The device consists of a power...
4788529 Multifunctional safety gas flow regulator's controller  
A multifunctional safety gas flow regulator controller, mainly composed of an electronic circuit, automatically starts an alarm and controls components that close the gas supply when the flame is...
4764758 Incipient fire detector II  
An improved incipient fire detector that employs a sub-micrometer size particle detector of the Wilson cloud chamber type in conjunction with a continuous on-the-fly sequential selector valve...
4751476 Detector device and method for distinguishing between fluids having different dielectric properties  
A device and method for distinguishing between different fluids on the basis of their dielectric properties. In an preferred embodiment, the device comprises two substantially parallel conductive...
4745399 Device for generating an alarm signal in the event of an environmental abnormality  
A device for generating an alarm signal in the event of an environmental abnormality has multiple sensors, with a multiplier associated with each sensor, an adder, and a comparator. The sensors are...
4707336 Apparatus for gas analysis  
A breath alcohol testing instrument comprises a breathing tube (10) connected to an instrument (15) for detecting alcohol, including a sampling system comprising a spring-loaded piston (30)...
4704607 System for remotely adjusting a parameter of an electrical circuit within an enclosure  
Gas sensors 1 are mounted on respective explosion proof housings 2 that contain microprocessor circuitry 11 for operating signals from the sensors. Signals from the circuitry 11 are transmitted...
4688021 Combined smoke and gas detection apparatus  
A combined smoke and gas detector utilizes a conventional smoke detector IC (44) which is operable to drive a piezo element (46) and an LED (94) to provide indication of a smoke or gas detection....
4668940 Portable hazard warning apparatus  
Portable electrically operable apparatus for monitoring and for giving warning of the presence of a predetermined environmental hazard in the neighbourhood of the apparatus and which comprises a...
4665385 Hazardous condition monitoring system  
Hazardous condition warning indications are transmitted from a site to a remote location on a conventional audio communication link. A variety of hazardous conditions including unconsciousness or...
4658244 Air-in-line detector  
A detector for automatically determining the presence of air in a fluid line comprises a plurality of ON-OFF optical sensors selectively disposed in series along the axis of a portion of an I.V....
4646066 Environmental indicator device and method  
A device for monitoring environmental exposure includes an element whose electrical properties change, in a predetermined way, in response to the environmental exposure. The element may be part of...
4638304 Environmental abnormality detecting apparatus  
An environmental abnormality detecting apparatus for detecting abnormality in atmosphere such as heat, smoke, and a gas. A sampling circuit is provided for periodically sampling analog signals from...
4630038 Vapor concentration control  
A method and device for continuously analyzing, retaining and periodically displaying the concentration of a selected component in an emission gas from a vapor recovery unit. A timing device is...
4618855 Soil pollution monitoring system  
A soil pollution monitoring system includes a plurality of ducts for conveying gases and air past a sensing device. The sensing device detects selected compounds in the gases and air and provides...
4603326 Anti-theft detector responsive to a chemical agent  
Anti-theft device, tag assembly and article theft detection system. An anti-theft device having a thin elongated sealed container (e.g., a closed tube) containing a chemical agent is attached to...
4599609 Personal liquid chemical agent detector  
A personal liquid chemical agent detector incorporating a sensor which changes resistance in response to contact with liquid, first and second switches which function as pins for attaching the...
4526028 Process and device for indicating and evaluating environmental parameters  
A multiplicity of environmental parameters, such as composition of the ambient atmosphere, temperature and air pressure, are concurrently measured with a portable device and registered together...
4525704 Enzymatic toxic gas sensor  
An enzymatic toxic gas sensor 10 having a plurality of parallel planar surfaces and a buffered electrolyte reservoir 44. The buffered electrolyte is conveyed by means of diffusion to a substrate 28...
4513280 Method and apparatus for the detection of toxicants  
A method and apparatus for rapidly detecting toxicants via the use of a ft CO 2 sensing cell and a second reference CO 2 sensing cell, with each sensing cell including a first chamber and a...
4500391 Method of and system for real time differential pulse detection  
An electrochemical detection cell which includes, in the order named, a stack of components constituted by a first membrane, an electrode carrier having reference and counter electrodes thereon, a...
4490715 Gas detector  
A gas detector for detecting the leak of fuel gases, such as hydrogen gas, methane gas, butane gas, with improved reliability in detecting the gas leak. Said gas detector includes a main gas...
4488118 Halogen gas leak detector  
A method and apparatus for measuring the presence of trace amounts of a halogen gas in ambient air by changes in conductivity of a negative corona in an electrical sensing gap due to the presence...
4480252 Gas detector  
A pellistor type combustible gas detector including a Wheatstone bridge therefor fed from a voltage regulator and a constant current generator. Two comparators detect, for example, 50% to 75% of...
4478704 Gas detection device  
The gas detection offered by the present invention is characterized by the detection of CO as distinct from H 2 . The optimum structure of the device therefor has an electrolytic cell wherein the...
4464653 Combustible gas detection system  
A combustible gas detection system in which remotely located combustible gas sensors of the analog type are monitored by a central controller. The sensor analog data is converted to digital data...
4464651 Home security and garage door operator system  
A home security and garage door operator system includes a gas sensor for detecting the level of toxic gas in the garage. When the gas level exceeds a predetermined threshold the garage door is...
4462246 Percent oxygen gauge  
A gauge measuring percent oxygen by simultaneously measuring oxygen partial pressure and ambient atmospheric pressure with solid state transducers. Two electrical signals obtained from the...
4426640 Laser scanning apparatus  
Apparatus for monitoring gaseous pollutants (e.g. on a chemical plant) produces two infra-red laser beams having different wavelengths (one corresponding to an absorption line of the gas to be...
4398183 Detecting method and apparatus for permanent wave hairdressing  
A method for detecting a condition of permanent waves during a permanent wave hairdressing, by using a chemical liquid which makes permanent waves and which produces a hydrogen sulfide gas at a...
Matches 351 - 400 out of 520 < 1 2 3 4 5 6 7 8 9 10 11 >