where lathe shears and legs are used, as in this class of lathe. It will be noted that each end of the cone spindle is provided with a face plate. The extra one is for use upon work too large to go between the lathe centers; in which case a movable hand rest-after the style shown in Fig. 47 - becomes necessary. This provision is very handy, but is not so good as the large face lathe shown in Fig. 236. Next to a lathe, a jig saw is the power tool most commonly found in a pattern shop. It is indeed a very useful tool to the pattern maker, notwithstanding the noise and jar that usually attends its use. Its small expense and lightness, as compared to a band saw, are no doubt the con Fig. 239. ATLANTIC WORKS siderations which cause it to be preferred, because the band saw is an infinitely superior machine, except it be in cases where an area surrounded by solid wood requires to be cut out, in which case the jig saw can be detached, passed through the work, and attached again— thus performing a duty peculiar to itself. In the jig saw, shown in Figs. 239 and 240, the table is planed true and pivoted, so as to cant over, for sawing bevels, or to give the pattern the necessary draught. The crank is provided with a conical schiele bearing at the front, adjusted by nuts at the end of the shaft. To stop the saw instantly, a friction brake is provided, and the sliding head or stock is adjustable in a long planed bearing upon the front of the column. The top guides are adjustable vertically, to suit different lengths of saws, and pivoted to regulate the Fig. 240. I amount of rake given to the saw. The machine is also provided with a rotary fan, to remove the sawdust from the lines upon the work, and keep the latter visible. The band sawing machine, shown in Fig. 241, is a very valuable machine for pattern making, because it will perform its duty with great truth as well as great rapidity, answering also the whole purpose of a circular saw, and very nearly the whole purpose of a jig saw. Among these qualifications, however, that of cutting true and exact to line is the most valuable, especially in the case of the teeth |