. Appleton's dictionary of machines, mechanics, engine-work, and engineering. to the stock, in a manner similar to d, and has as much room atx and x as is necessary to allow that part of the cutting-die which, when the stock is turned in the op-posite direction would drag, to recede out of the thread so as to clear the thread and particlea of metalcut out during the operation, by which arrangement the cutting-die will preserve its keen edge. Sup-pose the operation of screwing to have been commenced at the bottom of a pin, and the stock arrivedat the top ; the handle or screw / will require to
. Appleton's dictionary of machines, mechanics, engine-work, and engineering. to the stock, in a manner similar to d, and has as much room atx and x as is necessary to allow that part of the cutting-die which, when the stock is turned in the op-posite direction would drag, to recede out of the thread so as to clear the thread and particlea of metalcut out during the operation, by which arrangement the cutting-die will preserve its keen edge. Sup-pose the operation of screwing to have been commenced at the bottom of a pin, and the stock arrivedat the top ; the handle or screw / will require to be advanced a little, and then the stock is ready towork in the opposite direction. It is evident that the moment the handles// are pulled by the work-man, the die will bite on that side which is moved deeper by the pull, and recede out of cut on theopposite side; it will therefore act and cut like a tool in a lathe or planing machine, and preserve itskeen edge much longer, and remove filaments of metal much more easily than dies constructed in theordinary way. 3442. 3447. 3444. 3446. ^ o Fig 3444 is an end view of the stock; Fig. 3445 a ground plan and an end view of the cutting die-holder, and Fig. 3446 the lid of the stock fitting the bevel or half V grooves of the same; Fig. 3447 isa plan and section of the guide-die d, and Fig. 3448 shows a mode of regulating the play or motion ofthe cutting-die b, by means of set-screws. Fig. 3449 is a ground plan, and Fig. 3450 a section of a stock with two cutting-dies moving in alateral direction; a a is the stock or frame; bb the handles or set-screws, acting upon the dies cc,winch are perfect fits in the stock, and against which the cutting-dies dd slide laterally. These diesare confined between two plates which are screwed or riveted to the stock in the ordinary manner. Itis evident that the two cuttmg-dies dd, when tightened up against the piece which is to be screwed, TOOLS. 737 •will recede in the contrary direction to t
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Keywords: ., bookcentury1800, booksubjectmechanicalengineering, bookyear1861
