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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
wire is placed in a box, which is then charged with a gas which will not oxydize the wire when the latter is heated. This is for the purpose of preventing the formation of scale, and obviating the subsequent use of an acid bath to cleanse the wire. The vessel is provided with stopcocks by which the air in the interior is displaced and an artificial atmosphere or gas substituted. This is applicable to other articles besides wire. Washburn's annealing box. McCarty's annealing box. McCARTY, June 11, 1861. The device is intended for annealing cut-nails. The process consists in confining them in a suitable vessel, subjecting both vessel and contents to a red heat, and allowing the whole to cool from six to twelve hours, according to the size of the nails and tube, and maintaining the vessel air-tight during the heating and cooling process. Much attention has been directed to the annealing of cast-iron car-wheels. The object is to make the web soft and tough, so as to withs