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Grinnell improved Parmalee's first practical automatic sprinkler and patented his own Grinnell sprinkler in 1882. [5] Continual improvements resulted in the glass disc sprinkler in 1890. With slight modifications, this sprinkler head is still used in modern fire sprinkler systems ; sprinklers are even called le Grinnells in France. [ 6 ]
A fire sprinkler mounted on a ceiling. A fire sprinkler or sprinkler head is the component of a fire sprinkler system that discharges water when the effects of a fire have been detected, such as when a predetermined temperature has been exceeded. Fire sprinklers are extensively used worldwide, with over 40 million sprinkler heads fitted each year.
The company was founded in 1981 by Edwin J. Hunter and Paul M. Hunter, to produce a compact landscape sprinkler called the "PGP" (an acronym meaning "professional gear-driven pop-up"), the first sprinkler to utilize "matched-precipitation" regardless of the radii or arc. [7]
Grinnell remains today a trade mark inside the Tyco group. In 2001, Grinnell Fire Protection was merged with the Simplex Time Recorder Company to form SimplexGrinnell, which is the largest fire protection company in the world. ITT Grinnell supporting products are still sold today by Anvil International in the US and PSS in Germany.
The Pope brand (now owned by Toro Australia), continues to be used for lines of garden watering and sprinkler products. Although Pope was initially known for its washing machines, the brand has now been rationalised to small garden products. [2] In 2022, Electrolux stopped selling products under the Simpson brand name at Electrolux outlets.
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