Hello #PolongoCommunity, let's #ThrowBackToInventions.
A fire extinguisher is an active fire protection device used to extinguish or control small fires, often in emergency situations. It is not intended for use on an out-of-control fire, such as one which has reached the ceiling, endangers the user (i.e., no escape route, smoke, explosion hazard, etc.), or otherwise requires the expertise of a fire brigade.
There are two main types of fire extinguishers: stored-pressure and cartridge-operated. In stored pressure units, the expellant is stored in the same chamber as the firefighting agent itself. Depending on the agent used, different propellants are used.
Cartridge-operated extinguishers contain the expellant gas in a separate cartridge that is punctured prior to discharge, exposing the propellant to the extinguishing agent.
The first fire extinguisher of which there is any record was patented in England in 1723 by Ambrose Godfrey, a celebrated chemist at that time. It consisted of a cask of fire-extinguishing liquid containing a pewter chamber of gunpowder. This was connected with a system of fuses which were ignited, exploding the gunpowder and scattering the solution.
The modern fire extinguisher was invented by British Captain George William Manby in 1818; it consisted of a copper vessel of 3 gallons (13.6 liters) of pearl ash (potassium carbonate) solution contained within compressed air.
The biggest extinguisher in the world, made by Hungarian engineers, is called the "big wind". They removed gun turrets from an old Russian tank, replaced them with 2 turbines from a MiG-21 fighter jet.
In the Middle Ages, 'squirts' were first used. Applying jets of water to fires worked very similar to a bike pump, dipping the nozzle in water, sucking up one litre of water by pulling a plunger. Squirts were used on the 1666 Great Fire of London.
Written by @kingtochee
Edited by @officialangelsalt --#tbt #throwbackthursday #multimedia #Success #People #media #business #igers #love #photooftheday #follow4follow #like4like #picoftheday #travel