US400380A - Chusetts - Google Patents

Description

(ModeL') I w. 0. WORTHEN & G. PENDLETON, Jr. WRENGH.

110.400.1680. Y PatenedMar.Z6,1-889..

N. PETERS. Photo-Lilhograpmr. Wauhmglom 0.0.

' UNITED STATES PATENT OFFICE.

WILLIAM C. WO RTHEN GURDON PENDLETON, JR, OF BOSTON, MASSA= OHUSETTS, ASSIGNORS TO THEMSELVES AND JOHN D; WALWORTH, OF

SAME PLACE;

WRENCH.

sienerriexrmn formin part of Letters Patent 110.4003230, dated March 52%;, 1889.

' Application filed November 9, 1888'- Serial No. 290,367: (Modeli) To all whom it may concern.-

Be it known that we, WILLIAM G. WORTHEN and GURDON PENDLETON, Jr., both of Boston, in the county of Suffolk, State of Massachusetts, have invented a certain new and useful Improvement in Wrenches, of which the following is a description sufficiently full,

' clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference beinghad to the accompanying drawings, forming part of this specification, in which- Figure 1 is a side elevation of our improved wrench represented as in use, the handle being broken off; Fig. 2, a side elevation showing the fixed jaw with the plates removed; Fig. 3, a like view of one of the plates detached, and Fig. 4 a similar view of one of the straps detached.

Like letters and figures of reference indicate corresponding parts in the different figures of the drawings.

Our invention relates to that class of wrenches known as pipe-wrenches, it being,

designed as an improvement on the wrench described in our application for Letters Patent of the United States, filed July '16, 1888, Serial No. 280,088; and it consists in certain novel features, as hereinafter fully set forth and claimed, the object being to produce a more eifective and otherwise desirable device of this character than is now in ordinary use.

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation.

In the drawings, A represents the body of the wrench, B the handle, 0 the fixed jaw, and D the movable jaw.

The fixed jaw is preferably formed integral with the body, the curve of its inner edge being irregular, as shown in Fig. 2, and projecting into the body of said jaw, forming recesses 15 and 25. The movable jaw D slides on the body A in the usual manner, the edge of said jaw adjacent to the fixed jaw beinggrooved longitudinally and the bottom of said groove formed on an eccentric curve, as shown by the dotted lines 35 in Fig. 1, a recess, 45, be-

ing thus formed in the forward end thereof The handle B is secured to the body A in any suitable manner, and has a bracket, b, pro jecting laterally from the top thereof. An upward1y=pr0j ecting rod, G, is secured in the bracket 1), and a corresponding downwardlyprojecting rod, H, in the lower portion of the jaw D, said rods being respectively provided exteriorly with a compound right and left hand screw=thread, and their adjacent ends being inserted in a correspondingly=threaded rosette, J, whereby the movable jaw may be rapidly adjusted on the body. On each side of the groove in the movable jaw is formed a curved slot, (1, in parallelism with the horizontal portion 35 of the bottom of said groove.

Journaled in the slots 01 by means of hubs f is a roll, K, said slots being so disposed in the sides of said groove that when the hubs of said roll are in the lower end of the slots, as shown in Fig. 1, they will be substantially in the same vertical plane as the center of the rods G H. A plate, L, is secured to each side of the fixed jaw by rivets g, and formed in the lower portion of each plate are two curved slots, h, of the same size as the slot d, and so disposed that they are in an arc of the same circle. A roll, P, is journaled in each set of slots by means of hubs c, the corresponding hubs of each roll being connected by a curved strap, R, to prevent the distance between the rolls from varying when in use.

In the use of our improvement the pipe T is inserted between the jaws and the handle B. moved from left to right in the usual manner of obtaining a hold upon the pipe. This causes the rolls P K to move toward the recesses 15, 25, and 45, respectively, when they are brought into contact with the pipe T by forcing the movable. jaw upward by means of the rosette. The handle B is then moved in the opposite direction, causing the rolls as they leave the recesses and move onto the inclines of the jaws to grip the pipe in a manner that will be readily understood by all conversant with such matters without a more explicit description. By repeating the move ments of the handle 'a new hold may be taken on the pipe as fast as it is turned.

'It will readily be seen that by connecting the hubs of the rolls P by the straps B said rolls are caused to maintain the same relative position with respect to the roll K at all times and into whatever position they may be forced in the slots, thus avoiding the liability of slipping and releasing the hold upon the pipe. It will also be seen that the necessity of holding the wrench in engagement with the pipe while it is being moved to obtain a new hold is obviated by our improvement, as one roll, P, and the roll K are always outside the center of the pipe, rendering it impossible for it to pass from out the jaws until the movable j aw is withdrawn by the rosette.

Having thus explained our invention, what we claim is- \VILLIAM O. WVORTHEN. GURDON PENDLETON, JR,

\Vitnesses:

E. M. SPINNEY, O. M. SHAW.

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