US317923A - Amos call - Google Patents

Description

(No Model.) I

A. CALL.

WRENCH.

No. 317,923. I Patented May 12, 1885. w

WITNESSES NVEgR ATTO RN EY UNIT D STATES PATENT Cruise.

AMOS CALL, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO THE BEMIS & CALL HARDWARE AND TOOL COMPANY, OF SAME PLACE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 817,923, dated May 12, 1885.

Application filed September 25, 1884. (No model.)

To all whom it may concern:

Be it known that 1, Aims CALL, a citizen of the United States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Wrenches, of which the following is a specification.

This invention relates to improvements in wrenches, in which are embodied in a single wrench devices adapted to serve as a monkeywrench, and others possessing different characteristics, and peculiarly calculated to meet the requirements of a wrench for gripping and turning cylindrical objectssuch as pipes and round iron or other similar articles-the ob ject being to embrace in one tool or implement suitable operative elements for serving to the best advantage the above-named two purposes, but in which neither of the said elements can, either separately or combined, so act as to impair the efficiency of the wrench for either of the purposes for which it is constructed.

In the drawings forming part of this specification,Figure l isa side elevation of a wrench constructed according to my invention. Fig. 2 is a side view partly in section. Fig. 3 is a side view of the wrench above the handle, showing the position of the pipe-gripping lower jaw when the wrench is being used to turn a pipe.

In the drawings, a is the bar of the wrench, having thereon the usual handle, n, and the double jawed or branched head D, the said bar having a screw-thread formed thereon,on which the swivel-nut 2 turns for the purpose of moving the jaw-slides on the bar, said slides having a hook-like engagement with the nut zby means of a groove around it near one end,in the usual manner. One of the branches, 2), of said head D constitutes a fixed monkey-wrench jaw, having a plain face at right angles to the contiguous side of the bar a, and the opposite branch, d, of said head, to the under face of which is secured a serrated-faced grippingdog, f, constitutes a fixed pipe-wrench jaw, the under face of said dog being upwardly inclined relative to the contiguous side of the bar a.

Heretofore wrenches have been constructed for the double use as monkey and pipe wrenches, in which a single jaw-slide is provided with a plain-faced monkey-wrench jaw and with a serrated pipe-j aw located on opposite sides of the bar of the wrench; but such constructions, so far as I am familiar with them, embody practical disadvantages which are obviated by the improved construction herein shown and described.

The said improved wrench, as herein shown 6c and described, is made with its monkeywrench-jaw slide separate from the pipe-jaw and its slide, and the yokesla 7c of the former encircle the bar a in the usual manner, but are well fitted thereto, in order to prevent any vibra- 6 tion of said slide when operating to turn a nut or other object, the swivel-nut 2 serving to move said slide to and from the fixed jaw b.

The pipe-wrench-jaw slide, unlike that of the monkey-wrench,is purposely made to have a vibratory motion by the side of the bar a, and relative to the opposite jaw, 01, in order to permit the jaw 6, having the dogt' thereon, to effect a cam-grip on the pipe on, which description of grip is essential in a pipewrench, because thereby the teeth of the serrated jaws f and t become forced more or less into the surface of the pipe, and are consequently prevented from slipping thereon.

In order to allow said pipe-wrench-j aw slide 8 to vibrate, as aforesaid, the yokes 'u 12 thereof are fitted loosely around the bar a, and a spring, 20, is interposed between the upper yoke 12 and the inner side of jaw c, to throw the jaw e away from bar a, leaving an open- 8 ing, 0, between the dog t and the end of the upper yoke 76, which is closed up, or-iiearly so, when the wrench is in use in turning an objeot, as illustrated in Fig. 3, and when the wrench is free, or the jaw t is retired from the pipe m, the spring to swings the jaw outward again, as shown in Figs. 1 and 2, the jaw a during said operation of jaw 0 remaining in its parallel relation to the jaw 12, as above described. 9 5

Any other suitable spring than spring to may be employed for the purpose set forth above, and may be located at any other convenient point than between yoke 11 and the side of jaw c, or the pipe-wrench may be used (but not as conveniently) without a spring.

The dogs and t are secured. to their respective jaws d and e by screws, as shown, so that a broken or worn-out jaw may be easily replaced by a new one. vThe faces of said dogs stand at an incline to each other, as shown in Figs. 1 and 2, so that the cylindrical object as the wrench is forced upon it is rolled toward the bar a, and in so moving becomes more and more tightly gripped between the aws.

The movable dogs f and i may be dispensed with, if desired, by making thejaws d and e of steel and hardening them and giving them the proper forms.

What I claim as myinvention is- 1. In combination with a screw-threaded wrench-bar having fixed head projecting at opposite sides of the bar, a movable head at one side of the bar, having close-fitting yokes ing at opposite sides thereof, and in combina-.

tion therewith a movable jaw having yokes closely embracing the bar, and a movable jaw having yokes lbosely embracing the bar alternating with said first-mentioned yokes, and a spring interposed between the movable jaws to press them apart laterally, all substantially 30 as described.

AMOS CALL.

Witnesses:

H. A. CHAPIN, I J. D. GARFIELD.

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