The History of Fire Sprinklers
Provided by WikipediaIn 1812, British inventor Sir William Congreve patented a manual sprinkler system using perforated pipes along the ceiling. When someone noticed a fire, a valve outside the building could be opened to send water through the pipes.[2]
A large furniture factory had repeatedly burned down, and Hiram Stevens Maxim was consulted on how to prevent a recurrence. As a result, Maxim invented the first automatic fire sprinkler. It would douse the areas that were on fire, and it would report the fire to the fire station. Maxim was unable to sell the idea elsewhere, but when the patent expired the idea was used.[3][4]
Henry S. Parmalee of New Haven, CT created and installed the first automatic fire sprinkler system in 1874, using solder that melted in a fire to plug holes in the otherwise open water pipes. At the time he was the president of Mathusek Piano Works. Parmelee invented his sprinkler system in response to exorbitantly high insurance rates. Parmelee patented his idea and had great success with it in the U.S. Parmelee called his invention the "automatic fire extinguisher".[5] He then traveled to Europe to demonstrate his method to stop a building fire before total destruction.
His invention did not get as much attention as he had planned. Most people could not afford to install a sprinkler system. Once Parmelee realized this, he turned his efforts on educating the insurance companies about his system. He talked about how the sprinkler system would reduce the loss ratio, thus saving money for the insurance companies. He knew that he could never succeed in obtaining contracts from the business owners to install his system unless he could ensure for them a reasonable return in the form of reduced premiums.
In this connection he was fortunate enough to enlist the sympathies of two men, who both had connections in the insurance industry. The first of these was Major Hesketh, who, in addition to being a cotton spinner in a large business in Bolton, was Chairman of the Bolton Cotton Trades Mutual Insurance Company. The Directors of this Company and more particularly its Secretary, the late Peter Kevan, took an interest in Parmelee’s early experiments, and eventually it was to Major Hesketh, its Chairman, that Parmelee owed his first order for the Sprinkler Installations which were installed in the Cotton Spinning Mills of John Stones & Company, at Astley Bridge, Bolton, to be followed soon afterwards by the Alexandra Mills belonging to Mr. John Butler of the same town.
Although he got a contract through his efforts, the Bolton Cotton Trades Mutual Insurance Company was not a very big company outside of its local area. Parmelee needed a wider influence. He found this influence in James North Lane, the Manager of the Mutual Fire Insurance Corporation of Manchester. This company was founded in 1870 by the Textile Manufacturers' Associations of Lancashire and Yorkshire as a protest against high insurance rates. They had a policy of encouraging risk management and more particularly the use of the most up-to-date and scientific apparatus for extinguishing fires. Even though he put tremendous effort and time into educating the masses on his sprinkler system, by 1883 only about 10 factories were protected by the Parmelee sprinkler.
Back in the US, Frederick Grinnell, who was manufacturing the Parmelee sprinkler, designed a newer and more effective version which became known as the Grinnell sprinkler. He increased sensitivity by removing the fusible joint from all contact with the water, and, by seating a valve in the center of a flexible diaphragm, he relieved the low-fusing soldered joint of the strain of water pressure. By this means the valve seat was forced against the valve by the water pressure, producing a self-closing action, so that the greater the water pressure, the tighter the valve. The flexible diaphragm had a further and most important function. It caused the valve and its seat to move outwards simultaneously until the solder joint was completely severed. Grinnell got a patent for his version of the sprinkler system. He also took his invention to Europe, where it was a much bigger success than the Parmelee version. Eventually, the Parmelee system was withdrawn, which left an open path for Grinnell and his invention.
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