Abstract

The invention is directed to a nitrogen gas generator comprising a housing having two ends, ignition means at one end of the housing and a gas outflow opening at the other end of the housing, a volume of a filter at the outflow opening, a volume of solid propellant comprising sodium azide, a binder, a coolant and between 1 and 10 wt % of iron (III) oxide. Between the ignition means and the volume of solid propellant an active layer is present. The active layer comprises between 60 and 90 wt % of sodium azide, between 1 and 15 wt % of a binder, between 0.1 and 10 wt % of a coolant and between 5 and 30 wt % of iron (III) oxide. The content of iron (III) oxide in the active layer is higher than the content of iron(III)oxide in the solid propellant.

IPC Classes  ?

• C06B 35/00 - Compositions containing a metal azide
• A62C 5/00 - Making of fire-extinguishing materials immediately before use
• C06B 23/04 - Compositions characterised by non-explosive or non-thermic constituents for cooling the explosion gases
• C06B 45/04 - Compositions or products which are defined by structure or arrangement of component or product comprising solid particles dispersed in solid solution or matrix

Abstract

The invention is directed to a nitrogen gas generator comprising a housing having two ends, ignition means at one end of the housing and a gas outflow opening at the other end of the housing, a volume of a filter at the outflow opening, a volume of solid propellant comprising sodium azide, a binder, a coolant and between 1 and 10 wt% of iron (III) oxide. Between the ignition means and the volume of solid propellant an active layer is present. The active layer comprises between 60 and 90 wt% of sodium azide, between 1 and 15 wt% of a binder, between 0.1 and 10 wt% of a coolant and between 5 and 30 wt% of iron (III) oxide. The content of iron (III) oxide in the active layer is higher than the content of iron(III)oxide in the solid propellant.

IPC Classes  ?

• C06B 23/00 - Compositions characterised by non-explosive or non-thermic constituents
• C06B 35/00 - Compositions containing a metal azide
• C06D 5/06 - Generation of pressure gas, e.g. for blasting cartridges, starting cartridges, rockets by reaction of two or more solids
• A62C 5/00 - Making of fire-extinguishing materials immediately before use

Abstract

The invention is directed to a system comprising (i) an electrical device connected to a source of electrical power; (ii) a container comprising a solid propellant gas generator, an igniter and a filter positioned between the solid propellant gas generator and an outflow opening for a gas, which outflow opening is fluidly connected to the electrical device; (iii) means to detect fire indicator levels, comprising means to detect a temperature, a carbon monoxide level and a smoke particle level in the electrical device; and (iv) a control system having a control logic which, when two of the three fire indicators levels as measured by means (iii) are above a threshold value, will cut off the source of electrical power, and which will actuate the igniter after a predetermined delay time.

IPC Classes  ?

• A62C 3/16 - Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
• A62C 5/00 - Making of fire-extinguishing materials immediately before use
• A62C 37/36 - Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
• H05K 7/14 - Mounting supporting structure in casing or on frame or rack

Goods & Services

Fire extinguishing agents, chemicals and substances; fire resistant agents, chemicals and substances; compounds with sodium azide for use in cold gas generators; chemical products used to prevent overheating, excluding paints; nitrogen, whether or not supplied in cylinders; propellants, including inert gas and solid propellants; propellant gases for aerosol cans; propellant gases for generators; propellants for cold gas generators; chemical products for smoke suppression; chemical smoke and flame retardants. Fire extinguishers and extinguishing equipment, including fire suppression systems and equipment and fire resistant systems and equipment; heat sensors, optical sensors, fire sensors, temperature sensors, alarm equipment and heat regulating equipment for gas generators; alarm equipment and installations for prevention of fire and/or overheating in electrical installations; smoke sensors; flame sensors; fire alarms; air analysis equipment; acoustic alarms; gas alarms; security equipment and installations; components for above items. Gas generators, including propellant gas generators, cold propellant gas generators, nitrogen generators and propellant gas generators with built-in heat sensors, optical sensors, fire sensors, temperature sensors, alarm and/or heat regulating equipment; propellant gas generators, also for use in protecting electrical equipment (against fire or overheating) or to be built into electrical technology installations and equipment, servers, data processing systems, domestic electrical equipment, washing machines, washer dryers, ovens, microwave ovens, television apparatus and installations, video equipment and installations, DVD equipment and installations, satellite television equipment and installations, cable television equipment and spacecraft and in the engines of spacecraft.

Goods & Services

Fire extinguishers and fire suppression systems and components thereof, which extinguishes fire within confined spaces, comprised of one or more generators which produce a clean agent gas, nitrogen (N2) or carbon dioxide (CO2), at ambient temperature, when activated by one or more fire detection sensors or a fire detection system; electric or electronic sensors for heat, optic, fire, and temperature; fire and smoke detectors; electric or electronic sensors for detecting flames; temperature sensors; fire alarms

Abstract

The invention is directed to a system comprising (i) an electrical device connected to a source of electrical power; (ii) a container comprising a solid propellant gas generator, an igniter and a filter positioned between the solid propellant gas generator and an outflow opening for a gas, which outflow opening is fluidly connected to the electrical device; (iii) means to detect the temperature in the electrical device; and (iv) a control system having a control logic which, when a temperature is measured by means (iii) above a threshold value, will cut off the source of electrical power and which will actuate the igniter. The invention is also directed to a method to avoid a fire as a result of overheating, preferably performed in the above system.

IPC Classes  ?

• A62C 99/00 - Subject matter not provided for in other groups of this subclass
• A62C 37/36 - Control of fire-fighting equipment an actuating signal being generated by a sensor separate from an outlet device
• A62C 13/22 - Portable extinguishers which are permanently pressurised or pressurised immediately before use with pressure gas produced by chemicals with incendiary substances producing pressure gas
• A62C 5/00 - Making of fire-extinguishing materials immediately before use