Wilkinson Sword Gmbh

Graviner Limited

Other

Kidde Graviner Limited

Pains-wessex Limited

Detector Electronics (uk) Limited

David J Spring

David G Rowsell

Hugh R Watson

Roger Hems

Brian David Powell

John D King

Mark D Mitchell

John M Gascoyne

David G Roswell

Flame sensors and methods of sensing flame

The present invention relates to a system for recovering and purifying a halocarbon composition, particularly halon. Forming a part of the present system is a liquid heat exchange unit filled with a liquid heat transfer medium. A recovery tank is submerged in the heat transfer medium and is coupled to an impure halocarbon source. The liquid heat exchange unit cools the recovery tank and the impure halocarbon composition within the tank to a sufficient temperature to cause nitrogen gas to separate from the halocarbon composition and form a vapor within the top portion of the recovery tank. Thereafter, the recovery tank is vented and a mixture of separated nitrogen gas and halon vapor is directed through a vent stream having a carbon adsorber. As the separated gas moves through the carbon adsorber, organic halocarbon vapor is adsorbed and effectively removed from the nitrogen gas. Prior to the impure halocarbon composition reaching the recovery tank, the same is subjected to pretreatment and particularly to filtration for removing particulates, moisture, foreign oils and acids.

System and method for recovering and purifying a halocarbon composition

Materials are described which not only extinguish fires or suppress explosions but also remove at least part of any carbon monoxide which may remain after such prior extinguishing or explosion suppressing. Examples of suitable fire extinguishants and explosion suppressants are halocarbons such as bromotrifluoromethane. The carbon monoxide removing substance may comprise Hopcalite catalysts. Other examples of suitable substances are disclosed.

Extinguishing of fires and explosions

The pyrotechnic device comprises a projectile, a ground mounted device or a floating device whose casing contains a charge of particulate material, for example a combustible silicon-containing material in particular mixed with titanium or other suitable combustible metal-containing material and gunpowder such that, following ignition, infra-red emitting particles are emitted for forming an infra-red radiating screen.

Pyrotechnic device

A cooling apparatus comprises a chamber containing a pyrotechnic gas generating composition together with an igniter. When ignited, the gas generated by the composition is fed through filters where it is cooled to below the inversion temperature and it is then fed via a heat exchanger to a Joule-Thomson effect throttle where its temperature is further reduced. The gas output from the throttle is fed through a cool chamber where liquid gas collects. The outlet from the cool chamber is fed to the heat exchanger where it serves to reduce the temperature of the gas being fed to the throttle increasing the overall cooling effect.

Cooling apparatus

A radiation-responsive system is described for measuring the distance to a fire. A radiation detector produces an output I1 dependent on the intensity of radiation received in a narrow wavelength band where there is insignificant atmospheric absorption while another detector produces an output I2 dependent on the intensity received in a narrow wavelength band where there is significant atmospheric absorption. The ratio I1/I2 will thus be dependent on the distance to the fire because each of the terms will be equally affected by the normal square law decrease of intensity with distance, but the term I2 will decrease as the distance increases. A ratio unit measures the ratio I1/I2 which is converted into digital form and passed to a processing unit. The latter is programmed according to the precise form of the relationship between I1/I2 and distance to produce an output proportional to distance.

Detection of fires and explosions

Alkyl-substituted alicyclic carboxylic acids, esters and amides are disclosed having the property of stimulating the cold receptors of the nervous system of the human body to produce a cold sensation and are used for this purpose in a variety of edible and topical preparations.

Alicyclic amides having a physiological cooling effect

Compositions are disclosed having a physiological cooling action on the skin. The compositions contain, as the active ingredient, certain acyclic tertiary and secondary carboxamides.

Acyclic carboxamides having a physiological cooling effect

Novel compounds are disclosed having a physiological cooling action on the skin. The compounds are N-substituted p-methane 3-carboxamides.

N-substituted paramenthane carboxamides

Novel compounds are disclosed having a physiological cooling action on the skin. The compounds are N-substituted p-menthane 3-carboxamides.

N-hetero substituted-p-menthane-3-carboxamides are disclosed having the property of stimulating the cold receptors of the nervous system of the human body to produce a cold sensation and are used for this purpose in a variety of edible and topical preparations.

Growing community of inventors

Datchet, United Kingdom

David J Spring