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Cornelis took out a patent on his sawmill on 15 December 1593, and on the pitman arm device on 6 December 1597. [citation needed] Early sawmills adapted the whipsaw to mechanical power, generally driven by a water wheel. The circular motion of the wheel was changed to back-and-forth motion of the saw blade by the pitman arm or rod. A pitman is ...
Pitman arm Steering box, with the pitman arm just visible beneath. A Pitman arm is a shaft that translates rotary or angular movement into linear movement, or vice versa. Pitman arms are commonly found in water pumping windmills, automotive steering systems, and sewing machines. In windmills, the Pitman arm connects the driving gear to the ...
A parallelogram steering linkage is called such because like its namesake, the two sides of the linkage run parallel to each other and are equal in distance. This type of steering linkage uses four tie rods, one inner and one outer on each side (left and right) that are connected by an adjustment sleeve, a center link (which runs between the tie rods), an idler arm on the passenger side, and a ...
Kjell Norwood Lindgren (Chinese: 林其兒; pinyin: Lín Qí'ér; born January 23, 1973) is an American astronaut who was selected in June 2009 as a member of the NASA Astronaut Group 20. [1] He launched to the International Space Station (ISS) as part of Expedition 44 / 45 on July 22, 2015.
Economic geology is concerned with earth materials that can be used for economic and industrial purposes. These materials include precious and base metals, nonmetallic minerals and construction-grade stone. Economic geology is a subdiscipline of the geosciences; according to Lindgren (1933) it is “the application of geology”.
In April 2006, Pillsbury had a round of layoffs. These layoffs were in connection with the merger with Shaw Pitman in April 2005. [13] The layoffs included its unofficial mascot, Martin Macy. [14] Macy, who had started with the firm at the age 17, had been in the San Francisco office for 41 years prior to his dismissal.
United States of America, Senator Key Pittman. The Pittman Act was a United States federal law sponsored by Senator Key Pittman of Nevada and enacted on April 23, 1918. The Act authorized the conversion of up to 350,000,000 standard silver dollars into bullion and its sale or use for subsidiary silver coinage, and directed purchase of domestic silver for recoinage of a like number of dollars. [1]
Robert Lee Pitman (born 1962) [1] is an American attorney who serves as a United States district judge of the United States District Court for the Western District of Texas. He is a former United States attorney for the Western District of Texas.