US747261A - Wrench. - Google Patents

Description

PATENTED DEC. 15, 1903.

D. STBRNE.

WRENCH.

APPLIOATION FILED MAR. 29. 1903'.

NO MODEL.

[NI/EN TOR lJ NITF tarts Patented December 15, 1903.

arnr FFlClEt DAVEY STERNE, OF WASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR OF TWO-THIRDS TO JOHN W. BROWN AND JOSEPH A. KONSEY, OF WASH- INGTON, DISTRICT OF COLUMBIA.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 747,261, dated December 15, 1903.

Application filed March 28, 1903.

T ttZZ whom it may concern.-

Be it known that I, DAVEY STERNE, a citizen of the United States, and a resident of Washington, in the District of Columbia, have invented a certain new and useful Wrench, of

which the following is a specification.

My invention relates to that class of devices known as wrenches, and particularly to such devicesin s aidclass as are applicable for use also aspliers, &c., the object of the invention being to provide a tool of this class which will be reliable in use, quick to adjust, and economical to manufacture.

With this object in View myinvention conr 5 sists in the improved construction, arrangement, and combination of the parts of a wrench, which will be fully described hereinafter and afterward specifically claimed.

In the accompanying drawings, in which I have illustrated a practical embodiment of my invention, Figure 1 is a perspective view. Fig. 2 is a view partially in section, the movable handle being broken away and the parts in position ready to grasp a nut between the jaws. Fig. 3 is a similar view showing the whole of the movable handle, the jaws being locked on a nut. Fig. 4 is a detail perspective view of the movable jaw with parts of the body and movable handle.

Like letters of reference mark the same parts in all of the figures.

Referring to the drawings by letters, aindicates the fixed jaw, and b the movable jaw, the faces of which are provided with Mans verse teeth, as at o, to adapt the device for use as a pipe wrench and with roughened surfaces d to adapt them for use as pliers, while the movable jaw is formed also as a hammer-head at e. The fixed jaw islocated 40 at the end of the main body f, which is provided with transverse grooves g on its back surface and with graduated scales it, one on each side, and has also an extension forming the fixed handle 2', which at its outer end may be formed with nail or tack pulling jaws j.

The movable jaw b consists of a solid portion from which projects parallel sets of lugs 70 7c and ll, the former embracing the body f and provided with a cross-pin m, which Serial No. 149,989. (No model.)

may be a rivet or may be cast or otherwise made integral with the jaw, and the latter embracing the inner end or head of the movable handle a and provided with a cross-pin o, passing through the head of said handle, the movable handle being formed at its outer end, if desired, into a screw-driver p. The head of the movable jaw is cam-shaped, as at g, and may be provided with a notch r to coact with notches s s in the lugs Z Z of the movable jaw to form wire-cutters.

In assembling the parts of the devicethe movable jaw b,with the movable handle n,pivoted to it, is slipped over the fixed handle until the cross-pin m engages one of the grooves g, the movable handle hanging loose, as shown in Fig. 2. To grasp a nut of a given size, the movable jaw is moved forward until its face is at the proper distance from the face of the fixed jaw, as indicated on the graduated scales, after which, the movable handle is drawn toward the fixed handle until it reaches to or near the position shown in Figs.

1 and 3, during which movement the cam q, acting on the body, presses the movable jaw toward the fixed jawon pin m as pivot until the nut is firmly grasped. The reverse pressure on the movable jaw when pressed against a nut, as at 25, being in the line of an arc having the cross-pin m as a center and the point of contact of the cam q with the main body e becoming a fulcrum-point the said reverse pressure, acting on cross-pin 0, will cause the movable handle to press against the fixed handle, and thus be locked in contact therewithas soon as the cam q in moving on the main body has reached or passed the part indicated by dotted lines X X in Fig. 3. By this means the two handles are held together while grasping a nut, whereas if the cam were not so shaped as to pass to the locking-point it would be necessary to hold the handles together to maintain a hold on a nut and to prevent the movable handle from continually dropping to the position of Fig. 2, and thus withdrawing the movable jaw.

In order to permit of the ready separation of the handles to unlock the grip of the jaws, the handles are curved outwardly sufficiently to permit of the insertion of one or more fingers between them when closed, as shown in Figs. 1 and 3. i

As before stated, the roughened faces of the jaws adapt the device for use as pliers, and the manner in which it may be used as wire-cutter, nail-puller, and screw-driver will be readily understood.

Having thus fully described my invention, What I claim as new, and desire to secure by Letters Patent of the United States, is-

1. A wrench comprising a main body of rectangular form having transverse grooves in its rear surface and a fixed jaw at its outer end and a fixed handle atits inuerend, in combination with a movable jaw consisting of a solid portion, a pair of parallel lugs projecting therefrom, and embracing the body, a cross-pin connecting said lugs and engaging one of said grooves, a second pair of parallel lugs at the projecting from said solid portion, connected by a cross-pin, and a movable handle having a cam head pivoted on said pin, 7

' said'cam-head being shaped to cause the backward pressure by the article being grasped by the jaws to lock the handles together, substantially as described.

2. A wrench comprising an integral fixed handle, main body and fixed head orjaw, the body having transverse grooves across its rear face, a movable jaw embracing the main body and pivoted by a pin adapted to engage in said grooves, and a movable handle pivoted in a movable jaw at its inner front corner, said movable handle having a cam-head adapted to fulcrum against the surface of themain body and to pass to or beyond the plane of its pivotal pin thereby locking the jaws together by the back pressure of the article grasped, substantially as described.

In testimony whereof I afiix my signature.

DAVEY STERNE.

In presence of JOSEPH A. KINSEY, S. BRASHEARS.

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