. Appleton's dictionary of machines, mechanics, engine-work, and engineering. pping-nuts. In the view of the contrary or bolt-screwingend, the chucks L L are provided with plates grooved for the purpose of receiving the screwing-dies,which are adjusted by means of two set-screws, which press against, the backs of the dies so as to suitthem to any diameter of bolt. The motion of the spindles is stopped or reversed by the handles M M,at each end of the machine. They are connected by a lever with the vertical rod E, which carries theshifting-strap forks. The top driving-geer consists of three pul
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. pping-nuts. In the view of the contrary or bolt-screwingend, the chucks L L are provided with plates grooved for the purpose of receiving the screwing-dies,which are adjusted by means of two set-screws, which press against, the backs of the dies so as to suitthem to any diameter of bolt. The motion of the spindles is stopped or reversed by the handles M M,at each end of the machine. They are connected by a lever with the vertical rod E, which carries theshifting-strap forks. The top driving-geer consists of three pulleys, a fixed central one, with a loose oneon each side, all being on one shaft, which also carries a cone of three speeds exactly similar to C,—the last carries the driving-belts communicating directly with the machine. The centre pulley of theset of three is much narrower than that on each side of it, so as to allow of the release of the cross-strap before the open one comes upon it, and vice versa. For another somewhat similar arrangement,see Figs. 3282 to 3287. Analogous to the subject just discussed, is that of nut-cutting, an operation formerly entirely per-formed by manual labor, a tedious and uncertain process, but now effected with facility and precisionby self-acting machinery. In Figs. 2974 to 2976 we have given detailed views of a complete machine for this purpose, by Mr. , of Glasgow. The nut to be cut is fixed on the upright spindle of the support r, and is broughtin contact with the revolving-cutter x by means of the screw y, the requisite division of the faces of thenut being effected by means of the circular table, which is provided with six equal notches fitted witha spring-catch from the lever n. This machine is also provided with a self-acting feed motion, by whichthe nut is gradually moved up to the cutter while in action. This is effected by the shaft c of the speed-pulley e, which carries a worm s geeriug with the wheel h, upon the shaft o
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
