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5831537 |
Electrical current saving combined smoke and fire detector
A fire detection system (10) includes a smoke detector (52) that measures smoke particle density indicative of smoldering fires and a CO 2 detector (90) that measures CO 2 concentration...
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5828307 |
Hydrocarbon gas monitor desk
An enclosure for housing electrical equipment is constructed to simplify use of general purpose electrical equipment at a location in a petroleum refinery which may contain combustible vapors. The...
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5807098 |
Gas heater with alarm system
A heater including a housing, a heating assembly having a burner, and at least one of an oxygen level detection assembly adapted to distinguish between a relatively normal oxygen level, a...
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5801633 |
Combination smoke, carbon monoxide, and hydrocarbon detector
A combination smoke, carbon monoxide and hydrocarbon detector including a smoke detection mechanism adapted to transmit a smoke signal upon the detection of smoke, a carbon monoxide detection...
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5798700 |
False alarm resistant fire detector with improved performance
A fire detector having a greatly reduced frequency of generating false alarms. An AND gate is responsive to outputs from first and second fire detector modules that are responsive to the detection...
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5798945 |
Apparatus for building environmental reporting and control
Small modules directly situated at power outlets in buildings, that contain at least one sensor gather and report local environmental data such as temperature, humidity, carbon dioxide...
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5793296 |
Apparatus for carbon monoxide detection and automatic shutoff of a heating system
An apparatus for carbon monoxide detection and automatic shutoff of a heating system is provided which includes a single housing containing a thermostat, a carbon monoxide detector, and a control...
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5793295 |
Detection apparatus and method
A detector sensor system for sensing the presence of a toxic gas, such as carbon monoxide and/or smoke whereby a corresponding alarm is sounded. The presence of the gas is detected by passing light...
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5789659 |
Monitoring of multiple-electrode gas sensors
A gas sensor, suitable for use under non-steady state conditions, has a gas-sensitive resistor with pairs of electrodes which either have different spacings between the electrodes of a pair, or...
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5786768 |
Clock radio gas detector apparatus and method for alerting residents to hazardous gas concentrations
An alerting apparatus for alerting residents to hazardous gas concentrations, comprising an alarm clock, a gas sensor, a microcontroller, and visual display and auditory speech warning means for...
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5786767 |
Home safety system
A home safety system comprising a smoke detector, a carbon monoxide detector and a microphone connected to a transmitter. The smoke detector is powerable by a/c current and by a battery, and...
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5781118 |
Self-contained breathing apparatus having a personal alert safety system integrated therewith
The present invention provides a self-contained breathing apparatus ("SCBA") having a personal alert safety system ("PASS") fully integrated therewith. The PASS is structurally integrated with the...
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5774038 |
Safety monitor
The present invention relates to a improved safety monitor (10) which comprises a main monitor (12) and a remote monitor (14) which are in two way communication with each other. The main monitor...
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5771004 |
Gas detection system for a portable communication
A hazardous gas detection system is integrated into a wireless communication device such as a two-way radio. The radio has housing (102) with an opening (104) for receiving external air. A...
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5767777 |
Continuous air monitor alarm simulator and chart recorder simulator
A method and a system for simulating the conditions that are present during an air quality emergency occurring in a nuclear powered electrical generation plant. The system uses an apparatus which...
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5748081 |
Multi-functional anti-theft supervising assembly
A multi-functional anti-theft supervising assembly which has an overall configuration of a telephone, includes an anti-theft controller, a video monitoring circuit, a dialogue controlling circuit...
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5742516 |
Indoor air quality and ventilation assessment monitoring device
A monitoring device system and a method for controlling ventilation in an enclosed or confined environment by regulating the effective ventilation rate, air exchange rate, mixing factors,...
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5739756 |
Carbon monoxide detection system for motor vehicles
A new carbon monoxide detector for motor vehicles for detecting dangerous levels of carbon monoxide within the passenger areas of motor vehicles. The inventive device includes a carbon monoxide...
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5729207 |
Corrosive gas detecting sensor
A corrosive gas detecting sensor has a cartridge, a sensor body, and a connecting unit. The cartridge has a sensor element and a memory device. The sensor element changes its characteristic...
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5724255 |
Portable emergency action system for chemical releases
The present invention provides a calculated protective action zone, such as a safety zone which can be used for evacuation purposes, using simplified input methods and systems and simplified...
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5694118 |
Gas detection and alarm system for monitoring gas such as carbon monoxide
A gas detection and alarm system and a method thereof for monitoring a predetermined dose of carbon monoxide and other gases in the atmosphere which can be harmful to humans, having a gas...
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5691704 |
Practical and improved fire detector
A fire detector which combines an NDIR CO 2 gas detector with a photoelectric smoke detector to minimize false alarms by logic means that can be integrated into a single chip that can have an ASIC...
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5682145 |
Toxic gas detector with a time measurement sensor
The present invention is a carbon monoxide or other toxic gas detector. The detector of the present invention detects the presence of carbon monoxide in an air sample by measuring the time required...
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5680111 |
Dual sensor air-in-line detector
A device for the reliable detection of air or air bubbles in transparent or translucent tubing carrying a fluid which includes a transmitter element for transmitting a light beam to the fluid...
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5670949 |
Carbon monoxide/hydrocarbon thin film sensor
A ceramic sensor comprising a thin film of Cu x Mn 3 -x O 4 is provided that quantitatively measures the partial pressure of CO and hydrocarbon gases in a flowing system. The sensor is specific...
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5659296 |
Exposure indicating apparatus
An exposure indicating apparatus for monitoring air flowing along a flow-through path extending from the external environment through an air purifying respirator cartridge and into a face mask. A...
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5641006 |
Liquid supply apparatus and method of operation
A liquid supply module includes one or more sets of bulk liquid containers each supplying a respective reservoir via a liquid supply line. The bulk liquid containers and reservoirs are vented above...
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5640148 |
Dual activation alarm system
A holder for a personal alert safety system (PASS) has a bracket to receive the PASS, and a housing connected to the bracket. An additional activation switch is installed in the PASS, the...
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5627305 |
Gas sensing apparatus and method
A gas sensing apparatus is disclosed including a gas sensing device that is self-heated due to an applied voltage, whose resistance variation amount is varied to thereby sense gas; a voltage supply...
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5625346 |
Enhanced capabilities of smoke detectors
A smoke detector unit with a fan that creates an airstream which flows through a smoke detector. Both the fan and the smoke detector are located within a housing that is mounted to the fuselage of...
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5608384 |
Method and apparatus for monitoring for the presence of a gas
There is a method and disclosed apparatus for detecting for the presence within a gaseous atmosphere of a gas of a concentration above a preset level. The detecting apparatus comprises a sensor...
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5596314 |
Enclosure for a gas detector system
An enclosure for a gas detector including an easily removable and replaceable battery/sensor holder and a battery absence indicator. The enclosure includes a flat first panel adapted to be fastened...
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5589824 |
Multi-sensor detection system
An alarm for sensing different conditions of an ambient air presents a housing for an alarm circuit, the housing having lobes for first, second and third circuit sensors surrounding a single...
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5578997 |
Fuel detector for a turbojet engine oil tank
An apparatus for detecting fuel vapors in a turbojet engine oil tank is disclosed which incorporates a device in the oil tank which senses the presence of fuel vapors in the oil tank. The device...
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5578996 |
Long life detector
A long life, surface mountable ambient condition detector includes a non-replaceable battery for the purpose of providing power to the detector. The detector includes an activation switch mechanism...
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5576739 |
Carbon monoxide safety system
Described is a system for measuring noxious gas concentration in an affected space and for controlling the device producing the noxious gas or for decreasing the concentration of the gas in the...
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5565852 |
Smoke detector with digital display
An improved environmental alarm system has centralized control of local sensor display capabilities displays, on the sensor itself, a variety of sensor data including sensor address, and detected...
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5554976 |
Method and apparatus for detecting abnormality in gas supply equipment
An abnormality detecting apparatus constantly monitors even a slight amount of gas which has leaked by checking a gas supply pipe when it is determined that the pressure regulating function of a...
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5552646 |
Compact control and monitoring switch
A device for control and monitoring of pressure in a system combines a conventional three pole pressure switch with the following additional features: (1) a lock mechanism with three influencing...
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5539386 |
Sensor for detecting air/liquid transitions in a transparent tubing
A non-intrusive optical transmission liquid monitoring system that detects bubbles in a transparent liquid flowing through a transparent tubing. The system dynamically compensates for changes in...
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5528225 |
Gas detecting method and apparatus
A gas detecting method and apparatus for selectively detecting a fuel gas having methane as a main component thereof and an incomplete combustion gas having carbon monoxide as a main component...
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5526280 |
Method and system for gas detection
A system and method for using a gas detecting device that conducts electricity increasingly for increasing concentration of a gas being detected. The temperature of a gas sensor element is...
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5519382 |
Mobile fire detector system
A mobile fire detecting system for detecting fire conditions at the incipient stage before visible smoke has been released having an air sampling fire detector mounted to a cart supported by...
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5517182 |
Method for CO detection and its apparatus
A CO detector, utilizing periodical temperature change of a metal oxide semi-conductor gas sensor, is equipped with a backup battery. When power cut of a commercial power supply is detected, the...
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5502435 |
Method and system for monitoring circuit breaker gas pressure
A method and system are provided for monitoring the pressure of gas in a gas filled circuit breaker container based on a temperature compensated gas pressure signal which is compared with a signal...
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5489889 |
Universal earthquake safety valve
An improved system for shutting off utilities, such as gas and electricity, automatically in the case of an emergency, such as an earthquake, fire and the presence of hazardous fumes. The device...
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5483228 |
Safety indicating device for flashlights
A safety disconnect device for use in detecting a gas in a confined space, such as a flashlight, comprising the use of a catalytic gas recombination material, such as palladium, in conjunction with...
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5481904 |
Oil spillage detector
An oil spill sensing/communicating apparatus which is buoyantly situated, anchored or adrift, in a salt or fresh body of water, featuring a configuration which permits fluid passage therethrough of...
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5477903 |
Accordion storm shutter
An accordion storm shutter assembly includes a frame for installation in an opening in a building wall and at least one folding shutter supported by the frame. The shutter is made up of plural...
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5475311 |
Ionization gas analyzer and method
An ionization gas analyzer system includes an ionization chamber including ionization electrodes contained therein. The ionization chamber contains a test gas or gas mixture. A high voltage...
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