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Knight's Mechanical Encyclopedia (ed. Knight) 7 1 Browse Search
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Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
See puddling-furnace. Mechanical Puddlers. Griffith1865 McCarty1852 Berard1867 Harrison1854 Bloomhall1872 Bennett1864 Heatley1873 Gove1858 Dormoy1869 Riley1873 Danes1873 Sellers1873 Wood1870 Heatley1869 Revolving Puddlers. BeadlestoneDec. 9, 1857 HeatonAug. 13, 1867 AllenApr. 14, 1868 YatesFeb. 23, 1869 DanksNov. 24, 1868 DanksOct. 20, 1869 YatesFeb. 23, 1869 See also patents to Boynton, Allen, Jenkins, Smith, 1871; Jackson, Goodrich, Richardson, et al., Davies, Post, 1872; Jones, Danks, 1873. Pud′dle-rolls. The first, or roughing, rolls of a rolling-mill. Invented by Henry Cort, England, and patented in 1783. The loop, or ball of puddled iron, after a preliminary forging, is drawn out by passing through the puddle-rolls, instead of being extended under the hammer. It is then a rough bar. The rolls which bring the iron to definite merchantable shape are known as the merchant train. The process of drawing the loops in grooved rolls
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
al gas, generated in two retorts, by the action of which they are in a few minutes converted into steel, and are afterward ground, polished, and tempered. Mr. J. L. Davies, of Swansea, Wales, states that resin oil intimately mixed with about one fourth its weight of the residue of paraffine stills will restore steel which has bide of sodium which washes out. Hibble's plan is to paint with a compound of ground lime, turpentine, flaxseed oil, silicate of lead, and burnt copperas. Davies proposes sulphur and flaxseed oil. Barff and Sullivan: treatment with alumina, carbonate of zinc, and silicate of potash. Hardwicke: potash, alum, fish-oil,e impression from the striker. Swages are made in this way, the two portions receiving their grooves from a striker between them. See swage. 3. A harpoon. Davies's striker. Strik′ing. 1. (Architecture.) The removal of a center upon which an arch has been built. It is done by striking the wedges on which the ribs