Thermal triggering mechanism having a glass ampoule for aerosol fire extinguishers

A triggering mechanism for aerosol fire extinguishers comprising:

• a strike pin that is guided in a sleeve-shaped body;
• an inner spring that embraces the strike pin and applies force to the strike pin in the direction of a firing cap, wherein one end of the inner spring is stayed on the strike in and another end of the inner spring is staved on the body;
• a locking device that locks the strike pin in a stand-by state and frees it in a free state, wherein the locking device comprises a piston-like pressure plate to which force is applied in a housing by means of an outer spring;
• a thermally acting initiating element cooperating with the locking device in such a way that after the initiating element has been triggered the locking device is transferred from the stand-by state into the free state, wherein the initiating element in a stand-by state holds the pressure plate so that it is stationary in opposition to the force of the outer spring;
• and
• a booster charge arranged adjacent the firing cap, the booster charge being configured to be ignited by the firing cap to provide hot conversion gases configured to ignite a pyrotechnic extinguisher charge in an aerosol fire extinguisher.

An aerosol fire extinguisher comprising:

• a strike pin that is guided in a sleeve-shaped body;
• an inner spring that embraces the strike pin and applies force to the strike pin in the direction of a firing cap, wherein one end of the inner spring is stayed on the strike pin and another end of the inner spring is stayed on the body;
• a locking device that locks the strike pin in a stand-by state and frees it in a free state, wherein the locking device comprises a piston-like pressure plate to which force is applied in a housing by means of an outer spring;
• a thermally acting initiating element cooperating with the locking device in such a way that after the initiating element has been triggered the locking device is transferred from the stand-by state into the free state, wherein the initiating element in a stand-by state holds the pressure plate so that it is stationary in opposition to the force of the outer spring;
• a pyrotechnic extinguisher charge;
• and
• a booster charge arranged adjacent the firing cap, the booster charge being configured to be ignited by the firing cap to provide hot conversion gases configured to ignite the pyrotechnic extinguisher charge.