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Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
n heated to a cherry-red, and passed under the planishing-hammer three sheets at a time. The following are condensed descriptions of United States patents for modes of making sheet-iron similar to the Russian: No. 2,813, Wood, 10, 12, 1842. Rolled in usual manner, but left thicker; oxide removed by acid; cleaned and dried; coated with linseed-oil; two such plates placed between two others; the pack heated to a cherry-red and rolled repeatedly till the gloss is obtained. No. 2,824, Guilford, 22, 10, 1842 Scale removed by acid; washed and dried; subjected to mutual friction in a box with lid and stampers; heated to blue color; passed, while hot, through hardened and polished rolls. No. 8,048, Wood, 15, 4, 1851. Similar to No. 2,813, but the pack is rolled between shield-plates. The latter eventually become inside plates, being scaled, oiled, heated, and rolled as the others. Smoothed and glazed by cold rolling between shield-plates. No. 9,075, McCarty, 26, 6, 1852. Pl