The machinist, the blacksmith, the jeweler, and the workers ! at some other trades, know the value of a good vise. The vise- 1 man in the machine shop who has a clean, r ell-ordered bench, j 1 a drawer of well-assorted files, gages, straightedges, etc., and ( above all, a reliable vise, ought to be satisfied with his means of working or ought to quit the business. Yet, although : each variety of vise with which we are acquainted possesses * some advantage peculiar to itself, we have never seen one that . appears to combine them all so completely as the one herewith lepresented. The inventor cites these as the principal objections to the parallel vises now in use : " So constructed that a loss of squeezing power of abouttwenty percent is sustained ; not adapted to the same hight in all vises, while the rule for the elevation of the top of jaws is the level of the bend of the workman's elbow ; the strain, concentrated at one point, increasing the possibility of easy breakage by hard use, having no elasticity, too much rigidity, and considerable wear to screw and nut; having nothing to receive the concussion of a blow ; loss of motion, the screw sometimes making an entire revolution or more, before the jaws answer." It is a leg or post vise, sustained both by the bench and floor, making it solid and firm, by which the full force of the blow is obtained, while it is adjustable in every direction required by the necessities of the work. The foot pivots in a step screwed to the floor, and the rear jaw has a semi-circular ear through which passes a screw bolt, the head of which moves in the segmental slot of a plate screwed to the top of the bench. This permits the whole vise to be swung in a horizontal plane, so as to present the jaws to the edge of the bench at any angle desired, when it may be held firmly by the bolt. The advantage of this is too apparent to the workman to require more than a reference to it. The front jaw has an offset, A, carrying a ball and socket joint inside the hollow sliding bar, B, that permits the jaw to swing in the usual manner, and also to be turned at an angle to the back or fixed jaw, this latter movement being intended for holding work, the sides of which are not parallel, as a key, etc. To permit this motion, the eye of the front jaw through which the screw sheath passes is made flaring, or trump-shaped, at the front. On the front j aw, encircling the screw, is a saddle washer, the inside of which is made to conform to the outside of the jaw face, so that in j whatever position the jaw may be placed, this washer lias a perfect bearing. The sliding bar, B, may be moved in or out by sliding it through the collar in the lower part of the fixed jaw, and is held in position by a pivoted dog, C, the point of which engages with, notches cut on the top of the sliding bar. This allows the foot of the movable jaw to be kept parallel with the faces of the jaws, and to be accommodated to the diameter ; of the work to be held. The spring that throws this jaw out is concealed in the hollow bar, B, and it acts in whatever po-! sition the jaw may be. The bar is sustained by a projecting shelf forming a portion of the fixed jaw, strengthened, as seen, by a flange underneath. When the jaws are parallel they are held in that position by a clutch, D, on the front jaw that slides down and embraces, with its side projections, the squared portion of the sliding bar. When raised to permit the jaw to be set at an angle, it is held by a spring catch, E. The screw is at all times protected from chips, filings, or dirt, by the sheath, F, which is rigidly secured in the back jaw. The offset, A, does away with lost motion, the instant the screw is started the jaws moving simultaneously The jaws proper are of the best cast steel, reinforced with Swedish iron, and milled to a gage. They are fastened with 1 tapering steel pins and are made interchangeable, so that if '. ihey break or wear out they may be replaced at half the i 3ost of annealing, re-cutting, and re-tempering the old style. It will readily be seen that the strain is equally distributed from the top to the bottom of the vise, and the friction in j working is reduced to the minimum. In strength, durability, handlness, and elegance, this vise has certainly no su- perior. These vises are made of all sizes from eight-inch jaws to jewelers' size. They are made of a combination of Lake Superior, and other ores well known for their toughness, strength, and resistance to percussion. Every vise is put to : a test, three times as much as it is intended for in use, before it is sold. Patented by 0. H. Gardner, and made by the Fulton Manufacturing Company, to whom all orders should be addressed at Fulton, N. Y.
This article was originally published with the title "Improved Adjustable-Jaw Vise"