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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.
A fire sprinkler system is an active fire protection method, consisting of a water supply system providing adequate pressure and flowrate to a water distribution piping system, to which fire sprinklers are connected. Although initially used only in factories and large commercial buildings, systems for homes and small buildings are now available ...
Viking landing at Dublin, 841, by James Ward (1851-1924). Knowledge about military technology of the Viking Age (late 8th to mid-11th century Europe) is based on relatively sparse archaeological finds, pictorial representations, and to some extent on the accounts in the Norse sagas and laws recorded in the 12th–14th centuries.
British Viking in the well dock of HMS Bulwark Viking Mortar Section of RM Armoured Support Group in 2020 Queen's Royal Lancers in Helmand, 2008.. The BvS10 (Bandvagn Skyddad 10, also known as Bandvagn 410 or BV410) is a tracked articulated amphibious all-terrain armoured vehicle produced by BAE Systems Land Systems Hägglunds of Sweden. [1]
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In heraldry, an escutcheon (/ ɪ ˈ s k ʌ tʃ ən /, ih-SKUTCH-ən) is a shield that forms the main or focal element in an achievement of arms. The word can be used in two related senses. In the first sense, an escutcheon is the shield upon which a coat of arms is displayed. In the second sense, an escutcheon can itself be a charge within a ...
This fire engine, used by the Toronto Fire Services, is an example of firefighting apparatus. A firefighting apparatus (North American English) [1] or firefighting appliance (UK English) [2] describes any vehicle that has been customized for use during firefighting operations.
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