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  2. Matched precipitation rate - Wikipedia

    en.wikipedia.org/wiki/Matched_precipitation_rate

    In order to be "matched" all sprinkler heads in a given zone must have the same rate of precipitation. This can be achieved by matching the gallonage of a standard rotor to its arc and reducing range accordingly (i.e. 2 gallons at 90 degrees, 4 gallons at 180 degrees, or 8 gallons if the head does a full circle) or by using MPR nozzles or ...

  3. Sprinkler system timer - Wikipedia

    en.wikipedia.org/wiki/Sprinkler_system_timer

    A sprinkler system timer is an electrical device that is used to set an irrigation sprinkler system to come on automatically at a certain time. Irrigation timers first appeared in the early 1960s to control large-radius lawn sprinklers, which at the time usually contained their own electrically operated valve (most golf-course sprinklers still use this type of actuation).

  4. The Toro Company - Wikipedia

    en.wikipedia.org/wiki/The_Toro_Company

    The Toro Company was established as the "Toro Motor Company" in 1914 to build tractor engines for The Bull Tractor Company. [4] It built steam engines to support war efforts during World War I, and changed its name to Toro Manufacturing Company in 1920 when it began to refocus on manufacturing farm equipment. [5]

  5. Roto-Rooter - Wikipedia

    en.wikipedia.org/wiki/Roto-Rooter

    The plant manufactures the company's patented, proprietary Roto-Rooter sewer and drain cleaning machines as well as sewer and drain cleaning cables and blades. [1] Roto-Rooter is one of the two subsidiary divisions of the publicly traded Chemed Corporation, of which the other one is a hospice care provider VITAS Healthcare .

  6. James M. Spangler - Wikipedia

    en.wikipedia.org/wiki/James_M._Spangler

    James Murray Spangler (November 20, 1848 – January 23, 1915) was an American inventor, salesman, and janitor who invented the first commercially successful portable electric vacuum cleaner that revolutionized household carpet cleaning. His device was not the first vacuum cleaner, but it was the first that was practical for home use.

  7. Impact sprinkler - Wikipedia

    en.wikipedia.org/wiki/Impact_sprinkler

    Impact sprinkler head. An impact sprinkler (sometimes called an impulse sprinkler) is a type of irrigation sprinkler in which the sprinkler head, driven in a circular motion by the force of the outgoing water, pivots on a bearing on top of its threaded attachment nut. Invented in 1933 by Orton Englehart, it quickly found widespread use.

  8. K-factor (fire protection) - Wikipedia

    en.wikipedia.org/wiki/K-factor_(fire_protection)

    This engineering-related article is a stub. You can help Wikipedia by expanding it.

  9. Tiltrotor - Wikipedia

    en.wikipedia.org/wiki/Tiltrotor

    Original Patent filed May 28,1929 Transcendental Model 1-G hovering Bell X-22 A Bell XV-15 prepares to land. The first work in the direction of a tilt-rotor (French "Convertible") seems to have originated ca. 1902 by the French-Swiss brothers Henri and Armand Dufaux, for which they got a patent in February 1904, and made their work public in April 1905.