Читать книгу The Handyman's Book of Tools, Materials, and Processes Employed in Woodworking - Paul N. Hasluck - Страница 91

A portable vice for use when sharpening hand saws is shown by Fig. 275. It consists, practically, of a low stool, with one leg fixed at the extreme end, and continued upwards to a height suitable for the operator. The latter sits straddle-wise on the stool. The seat should be strongly mortised through the long leg, and be glued and wedged; and the back or short leg should be similarly mortised through the seat, unless the drawer shown—which is convenient for holding files—is omitted, when, as is frequently the case, the short leg may be hinged to fold up under the seat. In the latter case an iron stay—two would be better—must be provided to hold the leg rigid whilst the “horse” is in use. The movable jaw is simply a piece of wood hinged at the bottom to the long leg, and cramped up tightly against the other jaw by a fly-nut working on a screw, or by a screw as shown in the illustration. In order to keep the vice jaws from warping, strips of oak, mahogany, or other hardwood should be screwed on the inside surface of each, as shown, and these, again, may be covered with sheet lead. As the wood of which the jaws are made will be almost sure to curve somewhat as it gets dry, care should be taken that the growth marks or annular rings take a course from the outside of each jaw towards the inside; the jaws will then have a tendency to become concave on their faces, and will at each end tightly grip a saw placed between them, and the tightening-up process will tend towards bringing together the central part of the jaw faces. If the wood is placed so that the annular rings have the opposite direction, the jaws will, in course of time, become convex, and difficulty will be experienced in holding a saw firmly.

Fig. 275.—Portable Saw Vice.

Fig. 276.—Triangular Saw File.

Fig. 277.—Double-ended Saw File and Handle.

Fig. 278.—File for American Cross-cut Saws.