Il 26 marzo del 1872 venne brevettata una versione migliorata del vecchio estintore, progettata da Thomas J.Martin e da lui descritta così:
"The nature of invention relates to the construction, arrangement and combination of suitable pipes and valves for conducting water from suitable reservoirs to buildings by means of stationary engines, for the purpose of preventing or extinguishing fires in dwellings, mills, factories, towns and cities and may also be used for warning, ventilating and washing buildings and for washing pavements and sprinkling streets."
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