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Francis inlet scroll at the Grand Coulee Dam Side-view cutaway of a vertical Francis turbine. Here water enters horizontally in a spiral-shaped pipe (spiral case) wrapped around the outside of the turbine's rotating runner and exits vertically down through the center of the turbine. The Francis turbine is a type of water turbine.
Friction losses in a Kaplan turbine are less. The shaft of a Francis turbine is usually vertical (in many of the early machines it was horizontal), whereas in a Kaplan turbine it is always vertical. A Francis turbine's specific speed is medium (60–300 RPM); a Kaplan turbine's specific speed is high (300–1000 RPM).
The Kaplan turbine was an evolution of the Francis turbine. Its invention allowed efficient power production in low-head applications which was not possible with Francis turbines. [2] The head ranges from 10 to 70 metres (33 to 230 ft) and the output ranges from 5 to 200 MW. Runner diameters are between 2 and 11 metres (6 ft 7 in and 36 ft 1 in).
In 2003, Tacony Corporation acquired Nancy's Notions, a sewing accessories company founded by TV Host Nancy Zieman. [5] In May 2020 the company sold Nancy’s Notions to the Missouri Star Quilting Company. [6] In 2007, Tacony Corporation acquired Chicago-based Tornado Industries, commercial and industrial cleaning equipment company [7]
1913: The Kaplan turbine is invented by Viktor Kaplan. 1915: Harry Brearley invents a process to create Martensitic stainless steel, initially labelled Rustless Steel, later marketed as Staybrite, and AISI Type 420. [461] 1915: The first operational military tanks are designed in Great Britain and France. They are used in battle from 1916 and ...
St. Louis Motor Company; T. Ty-D-Bol; V. Vi-Jon Laboratories; Volpi Foods; W. Watlow; Western Type Foundry; Z. Zoltek This page was last edited on 17 August 2019, at ...
The two engineers worked on improving the turbine. And in 1848, Francis and Boyden successfully improved the turbine with what is now known as the Francis turbine. Francis's turbine eclipsed the Boyden turbine in power by 90%. In 1855, Francis published these findings in the "Lowell Hydraulic Experiments". [8]
Moldacot Pocket Sewing Machine Company – A short-lived company that made a portable sewing machine between 1885 and 1887 [15] National Sewing Machine Company – former Belvidere, Illinois-based manufacturer founded in the late 19th century, it manufactured sewing machines and other products. New Home, purchased by Janome in 1960 [16] and ...