Named Entity Browser, Andrew Wirz

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Knight's Mechanical Encyclopedia (ed. Knight)	2	0	Browse	Search
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Knight's Mechanical Encyclopedia (ed. Knight), S. (search)

o. 99,853.CrandellFeb. 15, 1870. No. 138,053.StebbinsApril 22, 1873. Instruments for laying out Stair Curves. No. 5,380.WoosterDec. 4, 1847. No. 18,110.StewartSept. 1, 1857. No. 24,763.ShaefferJuly 12, 1859. No. 66,796.ClowJuly 16, 1867. No. 75,423.HooverMar. 10, 1868. No. 97,707.SchollarDec. 7, 1869. Spi′ral pump. A form of the Archimedean screw water-elevator, consisting of a pipe coiled spirally round an inclined axis. It is said to have been invented about 1750 by Andrew Wirz, a pewterer of Zurich, and was employed in Florence with some improvements by Bernoulli, in 1779. See screw. Spi′ral-rib bit. A wood-boring tool adapted to be used in a brace. It has a spiral flange twisted around a cylindrical shaft. See bit, o, Fig. 695. Brick-machine. Spi′ral screw. A screw formed upon a conical or conoidal core. In the example, it serves as a driving-screw to force clay from the hopper into the molds beneath. Double helical spring. Spi′ral

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Named Entity Results, Andrew Wirz