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Knight's Mechanical Encyclopedia (ed. Knight) 2 0 Browse Search
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r, to defend the glass against the blows of the waves. Dead-lock. (Locksmithing.) A lock operated on one side by a handle and on the other side by a key. Dead Met′al. Metal, such as gold or silver, left with dead or lusterless, that is, unburnished or unpolished, surface. Matt. Dead-plate. (Furnace.) An ungrated portion of a furnace floor, on which coal is ccked previously to pushing into the fire above the grates. It was introduced by Watt in his patent of 1785. Dead-point. One of the points at which the crank assumes a position in line with the pitman or the rod which impels it. In steam-engines with vertical cylinders, the dead-points are the highest and lowest positions of the crank. A dead-center. Dead-ris′ing. The portion of the ship's bottom formed by the floor timbers. Deads. (Mining.) Non-metalliferous rock excavated around a vein or in forming drifts, levels, shafts, cross-courses, etc. Many veins are too narrow for working, and