Abstract: An apparatus is provided, which includes an electrolysis cell, a liquid flow path that passes through the electrolysis cell, and an indicator light. The indicator light is illuminated as a function of an operating characteristic of the electrolysis cell and luminous flux radiated from the light illuminates liquid along at least a portion of the flow path.

Abstract: The invention concerns a method for anticipating and/or delaying and/or preventing the risk of spontaneous combustion and/or explosion of an explosive atmosphere preserved in a confined or semi-confined medium, which consists in measuring the temperature of the mixing from the moment said mixture has been created and determining the critical moment of spontaneous combustion and/or explosion of said atmosphere by determining the unexpired inducting period, on the basis of the time which has elapsed between the creation of said atmosphere and the critical moment beyond which there is a risk of spontaneous combustion and/or explosion of said atmosphere.

Abstract: The present invention is directed to a cushioning device. The present cushioning device has many attributes that are common with many cushions. Some of these common attributes are at least one bladder having a top surface, a bottom surface and at least one side surface positioned between the top and the bottom surfaces. Another common attribute is a bladder cavity being defined by the top surface, the bottom surface and the at least one side surface. The present invention differs from other bladders in that there is a first conductive material and a second conductive material are positioned within the bladder cavity, positioned away from the bottom surface of the bladder, and capable of acting like a switch for a reactive device. The reactive device is electrically interconnected with the first and second conductive materials. When the first and second conductive materials contact each other the reactive device is capable of responding by sounding an alarm and/or re-inflating the bladder cavity with a fluid.

Abstract: A software driven, solid state controlled, electro-mechanically operated system to monitor volatile liquid fuel or other hazardous liquids and provide emergency shut-off if the delivery system is ruptured. A computer receives input from transducers monitoring the flow rate of the liquid through the line and a pressure sensor insures the system is prepared to function. The monitoring apparatus presets a condition based on current environmental conditions. Measuring the flow rate provides input to software that validates all other entries. Delivery quantities allowing point of delivery control to vary the delivery quantity to individual locations. The software options are: Preset conditions; Owner/operator input via external computer for loading delivery and trip instructions; Instructional output on LCD screen to driver on customer information and scheduling; Data download to owner/operator on billing information, driver daily activities and volume of propane remaining in vehicle.

Abstract: A tubing installation checking device is provided for determining proper installation of a tubing along a tube receiving channel in a peristaltic pump of the type having a tube receiving channel and a door for holding a tubing therein. The tubing installation checking device includes a pressure sensor held in the peristaltic pump positioned along the tube receiving channel downstream from the pumping mechanism for sensing pressure in the tubing and for providing a signal representing the sensed pressure. A valve is provided held in the peristaltic pump along the tube receiving channel downstream from the pressure sensor for closing the tubing when it is installed in the tube receiving channel.

Abstract: An online early warning detection system of runaway initiation in a batch chemical reactor. The system includes sensors for measuring the temperature in the reactor and/or jacket in different regions and at different instants and a device for deducing therefrom criteria for dangerous runaway conditions.

Abstract: 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 has a housing defining an inner chamber in which a piston is slidably located. An actuating cartridge is also located in the chamber between an end wall of the housing and the piston. The cartridge comprises a material which expands in volume when subjected to heat and one which produces an exothermic reaction in the presence of fuel vapors. The housing defines one or more orifices to enable the atmosphere within the tank to communicate with the actuating cartridge.

Abstract: A temperature sensor has a flexible nylon tube connected by a fluid-tight coupling to a metal bellows within a metal housing. The interior of the tube and bellows is filled with a pressurized liquid whose critical temperature corresponds to a threshold temperature to be sensed. The pressurized liquid holds the bellows extended, holding an actuating piston back against the action of a spring. When the threshold temperature is reached, the liquid in the tube must boil and ruptures the tube, causing the bellows to collapse and the actuating piston to move. A projecting actuator then mechanically initiates a response such as the closing of a damper in an air-conditioning duct.

Abstract: Methods and apparatus for the inspection of air cargo including passenger luggage for pressure sensitive bombs. In accordance with the method, the air cargo is placed in a pressure vessel, which is then pressure cycled between a super-ambient pressure and a sub-ambient pressure duplicating the pressure at a substantial altitude. Cycling in this manner will trigger pressure sensitive switches set to set off, or initiate a timing device to set off, a terrorist bomb. The apparatus includes a pressure vessel with large blowout ports for venting the same to the atmosphere upon an extraordinary pressure rise indicative of the detonation of an explosive charge within the chamber. Also preferably located within the chamber are sensors, typically electromagnetic noise sensors, for sensing electromagnetic radiation characteristic of a switch closure turning on current to a bomb timing device.

Abstract: Anti-theft device comprising a flexible and deformable elongated assembly (1) which is capable of forming a loop and is provided at one end with a male closure member (2, 64) and at the other end with a female closure member (3, 2) adapted to receive and releasably lock the male closure member (2, 64). One of the closure members (3, 62; 2, 64) is provided with a closure device which can be opened by a key in order to release the other closure member. The elongated assembly (1) is made up of elongated elements (8, 41) undetachably assembled together in interengaged relation in the form of a chain.

Abstract: A pneumatic temperature sensitive system has a hollow detector member laid in a loop for instance in the room. The detector member is pressurized so that when the critical temperature is reached the detector member bursts and its interior space is depressurized. The detector member is connected with a pressure sensor to produce an electrical or other signal when the pressure falls so that further equipment may be activated.

Abstract: A vehicle, such as an agricultural tractor, includes a hydraulic assist-type transmission with fluid control and lubricating circuits. A monitoring system senses the fluid pressure in the lubricating circuit, the hydraulic fluid temperature and the engine speed. The sensed pressure is compared to a temperature and engine speed-compensated alarm value. Alarm signals are generated when the sensed pressure is continuously below the alarm value for a certain period. The alarm is disabled when the engine speed falls below a non-zero threshold level.

Abstract: An engine oil pressure monitor includes an engine oil pressure sensor and an engine speed sensor. A plurality of pressure alarm values are generated to correspond to designated distinct ranges of engine speed. One of the alarm values is selected according to which engine speed range contains the sensed engine speed. An alarm signal is generated when the sensed pressure falls below the alarm value. The alarm is disabled when the engine speed falls below a minimum non-zero engine speed and is disabled unless the pressure failure condition persists for at least a predetermined time period.

Abstract: For the early detection of an abnormal rise in the temperature in an enclosure to be protected, a large number of micro-containers are arranged in the enclosure. These micro-containers are, for example, incorporated in the paint coating the walls of the enclosure. The micro-containers are filled with an extinguishing gas and produce when they burst a characteristic noise which is detected by microphones. The installation also comprises for the purpose of avoiding false alarms and achieving an adequate discrimination of the useful signal from that produced by the normal surrounding noise, a filtering and processing circuit which operates in an essentially digital manner.

Abstract: A portable alarm device senses movement of the device and actuates an alarm. A pendulum with attached magnet, set in motion by movement of the device, causes closing of alarm circuit reed switches to actuate a continuous alarm. The pendulum may be set by a control member and removable key to a hold position to prevent its oscillation or to a release position to allow its oscillation.

Abstract: Pressure drop detectors are provided which are suitable for use in pressurized fluid fire alarm systems. The pressure drop detectors have pressurized fluid circuits provided as channels in the surface of a block of material, including one channel connected to a source of fluid pressure. The channels are associated with valve regions by means of which, with a first diaphragm pressed thereagainst, a required one or more of the channels can be closed off.The pressure drop detectors have a normally pressurized region of the first diaphragm which by means of a first piston normally supports a mechanical linkage of the detector. If the pressure drops however on release of pressure in the circuit connected to the detector, the collapsing of the first diaphragm allows the mechanical linkage to be released thus actuating a fire alarm.