US859020A - Wrench. - Google Patents

Description

I No. 859,020. TATBNTTD JULY 2, 19o?.

alza y RoBETA.SM/TH R. A. SMITH.

WRENCH. APPLIOATIONTILBD JUNE 2.1906.

/VE N TOR W/T SSES A TTOHNEYS ROBERT A. SMITH, OF LAURELVILLE, PENNSYLVANIA.

WRENCH.

Specification of Letters Patent.

Patented July 2, 1907.

Application filed June 2,1906. Serial No. 319,859.

To all whom it4 may concern:

Be it known that I, ROBERT A. SMITH, a citizen of the United States, residing at Laurelville, in the county of Westmoreland and State of Pennsylvania, have invented an Improvement in Wrenches, of which the following is a specication.

My invention is an improvement in the class oi pipe Wrenches, and the features of novelty are hereinafter described and specifically indicated in the claims.

In the accompanying drawing, Figure l is a side view of one form of my invention; Fig. 2 is a transverse section on the line 2 2 of Fig. I; Fig. 3 is a transverse section on the line 3 3 of Fig. l; Fig. 4 is a similar section, the lever for rotating the eccentric nut being shown closed in one figure and thrown open in the other; and Fig. 5 is a side view of a wrench similar in essentials to that shown in Fig. l-a portion being broken away to show interior constructionsave that the pivoted jaw for the pipe wrench is attached directly to the shank instead of an enlarged head thereon. Fig. 6 is a view illustrating the practical use and operation of the wrench.

I will first describe my invention as indicated in Figs. l to 4 and Fig. 6.

l indicates the shank which is provided on one side with teeth l, and 2 a fixed head thereon which coperates with the sliding jaw projecting from the slidable head 3 to orm a monkey wrench. To the head or iXed jaw 2 on the opposite side of the shank is pivoted a jaw 4 which forms a part oi the pipe wrench, the same having a right angular' notch 5 on the inner side to receive a pipe. Said notch is roughened or corrugated transversely to give a strong friction hold on the pipe. The jaw is pivoted at its inner angle 6, and a plate spring 7 is arranged behind it in such manner as to tend to throw it inward or toward the movable jaw 3 o the pipe wrench. The head carrying the jaws 3f is detachably secured to a slotted head 3b, by means of a part 3 which is grooved lengthwise to receive the shank l ofthe wrench. For the purpose 0l locking the movable jaws 3, 3", at any required point on the shank, that is to say at any required distance from the pivoted jaw 4, I provide an eccentric nut or screw 8 which is pivoted at 9 in the parts 3, 3b. The same is cut out lengthwise at l0 on o'ne side, whereby it is rendered eccentric. Thus, when such valve or cutout portion is arranged adjacent to the teeth I of the shank l, the jaw 3, may be slid on the shank and thus adjusted to any required point thereon; but when the nut or screw 8 is rotated to the position indicated in Figs. I and 2, its thread is engaged with the teeth l, and the jaw 3f, are thereby locked.

The shape of the inner face of the pivoted jaw 4 is very advantageous as compared with jaws arranged in the same general relation to the shank and sliding jaw of a wrench of this class. The right angular recess enables the jaw 4 to take a firm grip on pipe, what I have sometimes termed a wrapping grip, which will prevent the pipe slipping and at the same time enables the jaw to be quickly released from the pipe when the rotation of the wrench around the pipe is reversed. For the purpose of thus rotating the nut or screw 8, I employ a lever ll whose enlarged head `lla-see Fig. S-is clamped on the extended journal oi the nut 8. The body oi the lever is cut out in such manner as to adapt it to fit around the wrench shank as indicated in the said Fig. 3, so that the same lies close alongside the laterally projecting portion oi the head 3b and is flush with the outer side of the same.

Thus the lever offers no obstruction in the use of the wrench. The free end of the lever is provided with a lug 1lb-see Figs. l and 3-which serves as a thumb catch enabling the lever to be readily opened or closed. The levers are held normally locked in the position indicated by full lines Fig. 3, or in the unlocked position indicated by dotted lines Fig. 3 and full lines Fig. 4, by means of a bar spring l2, the free end oi the same resting upon the enlarged head Ila of the lever and the other being secured to the part 3b of the sliding attachment. When the free end of the spring l2 abuts the inclined shoulder on the head llfL of the lever 11,

it is held locked as shown in Fig. 3; but upon applying due pressure to the thumb piece 1lb, the lever Il may be thrown open, and in such manner the free end of `the catch will ride over the inclined shoulder o the lever head lltL as indicated in Fig. 4. Thus in any case the pressure of the spring holds the lever in either oi the two required positions; that is to say, in the position for locking the nut 8 with the shank teeth l, or in the position to bring the flattened side l0 opposite the teeth la, in which case the nut and the jaws 3, 3, and head 3l, may be slidalong the wrench shank.

In the form of wrench shown in Fig. 5, the liXed head or jaw 2 shown in Fig. l, is dispensed with, and the pivoted pipe-wrench jaw 4L is pivoted directly to the shank lb, the end of the same being cut away or beveled at I3, and the jaw 4a being provided with a sleeve that embraces the head oi the said shank l. A spring 7!L is attached to the jaw 4fL and its free end enters a notch or groove in the shank as shown. Thus the jaw proper is held normally inclined or projected toward the slidable jaw 3a, as Shown. The screw 8% is in this instance toothed on one side only, the remaining portion being smooth so that it may be engaged with or disengaged from the teeth of the shank lb in the same manner as the screw 8 before described.`

I claim:

In a wrench of the class indicated, the combination, with a toothed shank with a fixed and sliding jaw, and a frame constituting an attachment of the sliding jaw comprising,` the parts 3 3c of the locking attachment consisting of an interrupted screw journaled coneentrically at its ends in the frame of the sliding jaw, the lever 11 secured to one of the screw journals and adapted to fit around the Wrench shank, and a spring attached to the part 3b on the opposite side of the shank and adapted to engage at its free end with the shoulderof the lever for locking it in the closed position, both the lever and the spring lying flush with the head 3, as shown and described.

ROBERT A. SMITH.

Witnesses:

WM. S. YARD, C. R. LEIGHTY.

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