US1117710A - Wrench. - Google Patents

Description

A; SHEDLOGK.

WRENCH.

APPLICATION FILED APR. 9, 1913.

1,1 17,710. Patented Nov. 17, 1914.

1&1; F 3.

a L m 2 x 1 i w I 12 g i L THE NORRIS PETERS Co PHoro-LITHQ, WASHING ION. D. c

"UNITED %TATE% @FFICE.

ALFRED SHEDLOCK, OF CANNON STATION, CONNECTICUT.

W'RENCH.

Application filed April 9, 1913.

1 b all whom it may concern Be it known that I, ALFRED SHEDLOCK, a citizen of the United States, residing at Cannon Station, county of Fairfield, State of Connecticut, have invented a new and useful lVrench, of which the following is a specification.

The wrench forming the subject of this invention is of that class in which one of the jaws is set in operative position relative to the other jaw by means of a screw and coacting nut, and it comprises means for positively forcibly closing the jaws on an article placed between them and positively releasing the j aws when a fresh grip on the article has to be taken, and also means for preventing the loss of the set adjustment in handling the tool due to slackness of the screw or nut, or both. The construction and arrangement of the operating handle, which is fitted to rock on one of the j aw-members, and of its co-acting parts, are such that large working bearings are provided and that the power applied to said rocking handle causes the necessary amount of gripping action. of the jaws to insure a positive and secure hold on the article placed between them.

Practical embodiments of the invention are illustrated in the accompanying drawings, in which:

Figure l is a side view of a wrench embodying the features of this invention with the front half of the operating handle removed; Fig. 2 is a transverse section, on line 2, 2, Fig. 1; Fig. 3 is a view similar to Fig. 1, illustrating a modification; and Fig. 4 1s a transverse section, on line l, 4, Fig. 3.

The body portion a, of the wrench shown at Figs. 1 and 2, carries the inner jaw b, and is provided with sockets e, (Z, in which slides the stem 6 of the outer jaw f. This stem is screw-threaded and has an adjusting nut g. The operating handle it is forked at its upper part to embrace the two sides of the body, and is preferably longitudinally divided into two parts which are secured together when in operative position, as by means of screws or rivets. The extreme upper ends 71, '5, of the two branches of the handle are rounded and fit into circular recesses j, 7', formed in the sides of the body a, constituting knee-joints, and to hold these parts together annular grooves k, is, are formed on the sides of the body a into which extend corresponding flanges Z on the ends i, 2', of the handle. Power is applied to Specification of Letters Patent.

Serial No. 759,859.

bring the jaws b and f together to forcibly grip an article, as a pipe or nut, located between them, when the handle is rocked on its knee-joints, to the part of the to or outer surface of the nut 9 adjacent the body a by a bar in contact therewith extending between the opposite inner faces of the ends 1', 1', preferably composed of lugs m, m, formed on the ends 6, 2', thus affording a working bearing contact between m, m, and the nut g of considerable extent, as clearly shown at Fig. 2.

To insure proper gripping action of the jaws, whether they be toothed to grip pipe or plain to grip nuts, it is found that the lever action of the handle must exert considerable force in bringing the jaws together, and this construction, with the bearing located within the circle of the knee joint bearing, tends to such end as the work resisting arm of the lever may be very short between the center of the knee-joints and the working edge of bar m, m, relatively to the power applying arm, viz., the length between center of knee-joint and the end of Patented Nov. 17, 1914.

the handle. This construction also provides large and strong working bearings.

A spring a may be interposed between the lower face of the nut g and the body a to hold the upper face of the nut and the bar m, m, together, and consequently pressing the rounded upper ends 13 of the handle at all times against the circular recess bearing j, thus holding all parts of the wrench together and avoiding the use of special means for this purpose, such as the before mentioned annular grooves in and flanges Z. The spring also acts to prevent rattling of the parts, which is liable to cause the nut to turn on the stem and so disturb the adjustment of the jaws.

The operation of the modification, Figs. 3 I

and -.l. and the functions of the various parts are similar to the device described. The

screw-threaded stem 6 carries the inner jaw Z and the under side of the nut g is acted upon by the bar 0, 0, of the operating handle 71., whose upper forked end is provided with circular bosses p, p, which fit into corresponding recesses q, Q, formed in the sides of the body 7', which carries at its upper end the outer jaw f, and has sockets s and t in which the screw-threaded stem 6 slides. A flat washer spring o is placed between the top of the nut g and the socket s. This spring '0 holds the parts together and prevents rattling and consequent shifting of the nut on the screw, which occurs with loss of adjustment when, as is usual in this class of wrenches, there is slackness in the working parts. The two parts of the handle may, when in operative position, be secured together by rivets or screws 10. Instead of the working bars m, m of Figs. 1 and 2 and 0, 0, of Figs. 3 and at working on the parts of the nuts adjacent the edge of the stems, they may be extended to work on the nuts at the flat sides ofthe stein, as indicated by the dotted lines 41;, a", Fig. 3, when it is thought advisable to increase the amount of movement of the sliding jaw relative to the arc of rocking of the handle on the body of the wrench.

I claim:

1; A wrench. comprising two aw members, one provided with sockets and the other one'having a screw-threaded stem fitted to slide in the sockets, an adjusting nut on the stem, anoperating lever handle connected to rock on the socket provided member and a bearing bar carried by the handle, located within the circle of the bearing surface of the. handle and between the adjacent edges of the screw-threaded stem and the socket provided member, and adapted to act on one of the faces of the nut to move the jaws to ward one another.

2. A Wrench comprising two members, one provided with sockets and the other one having a screw-threaded stem fitted to slide in the sockets, an adjusting nut on the stem, an operating lever handle connected to rock on the socket provided member and a bearing bar. carried by the handle, located within the circle of the bearing surface of the handle and between the adjacent edges of .the screw-threaded stem and the socket provided member, and adapted to act on one offthe faces of the nut to move the jaws toward one another, and a spring arranged toact on the other side of the nut and operating to separate the j aws 3: A wrench comprising a jaw provided- Wlth ascrew-threaded stem, a nut on the stem and body portion and adaptedto act on one side of the nut.

4. A wrench comprising a jaw provided with a screw threaded stem, a nut on the stem, a body portion provided with the other jaw and sockets in which the screw-threaded stem slides and having circular recesses formed in its sides, an operating handle having its end formed to fit in the circular recesses of the body portion, thus constituting ing knee-joints, and a bearing bar on the handle located between the adjacent edges of the stem and body portion and adapted to act on one side of the nut, and a spring adapted to act on the other side of the nut.

5. A wrench comprising two members slidably connected, means carried by one of the members for spacing the jaws of the members relative to one another, an operating handle having a lateral opening embracing the body portion of the other member and having its end rounded, open sided circular hearings on the sides of the last mentioned member into which the rounded end of the handle seats, a bearing extending across the lateral opening of the handle adapted to act on one side of thejaw spacing means, and a spring arranged to act on the other side of the jaw spacing means to hold the parts of the wrench operatively together and to separate the jaws when the handle is moved backwardly.

6. A wrench comprising two jaw members, one provided with a screw-threaded stem and the other one "provided with sockets in which the stem is fitted to slide, a nut on the-stem, an operating handle having a lateral opening .embracingthe inner part of across the lateral opening of-the handle.

adapted to act on the outer. side'of the nut,

and a spring arranged between the inner side of the nut and the inner socket of the 1nner jaw member ,so as to hold the parts of the wrench operatively together and to separate the. jaws when the handle is. moved backwardly.

In testimony whereof I havehereunto set my hand this 8th day of April, 1913. p

i ALFRED SHEDLOCK. In the presence of-- ARTHUR G. BLATZ, WM. J. DOLAN.

copies of. this patent may bev obtained for five cents each, by addressing, the 5 Commissioner of Patents.

. Waahingt on, 31.0.

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