. Appleton's dictionary of machines, mechanics, engine-work, and engineering. to the bevel of the head. J is a steel plate, in which there is a countersink d to admit the head of thescrew to come into contact with the tool G. Where the tool is to act upon the head the steel plate J iscut away, as shown at e. The arbor C C is tubular, and there passes through it a sliding-bolt K, having a wedge-formed head K,»y which the jaws D D are to be closed, and this closing will take place as the bolt is drawn back, and. 3248. the wedge part K is forced against the tails /*/ of the jaws. F is a shaft, to
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. to the bevel of the head. J is a steel plate, in which there is a countersink d to admit the head of thescrew to come into contact with the tool G. Where the tool is to act upon the head the steel plate J iscut away, as shown at e. The arbor C C is tubular, and there passes through it a sliding-bolt K, having a wedge-formed head K,»y which the jaws D D are to be closed, and this closing will take place as the bolt is drawn back, and. 3248. the wedge part K is forced against the tails /*/ of the jaws. F is a shaft, to which is attached ailarm F, that is forked at its outer end Fg, and is received between collets LL attached to the sliding- 590 SCREW-CUTTING MACHINE. bolt K. E E are a handle and lever, by which the sliding-bolt K and the spindle C are drawn spiral spring M surrounds the arbor C, and bearing against the uppermost of the heads A2 and againstthe pulley B, causes the spindle and bolt to descend, when the handle E is allowed to recede and ren-ders the motion in both directions regular and smooth. As the bolt K descends it is brought into con-tact with the pins gg, which are made fast to the jaws and forces them open. In using this machine, when the handle E has been moved back, and the sliding-bolt and arbor havedescended, a blank, which has been notched, is fed in through the countersunk opening in the plate J,so as to enter between the jaws. The handle E is then drawn forward, which closes sa
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
