US1305628A - Boxiand johjst statham - Google Patents

Description

R. J. STATHAM.

WRENCH.

APPLICATION men ocr. 5, ms.

1 305, 628 Patented June 3, 1919.

have invented certain new ROLAND JUHN s'rn,

OF VANCOUVER, BRITISH COLUMBIA, CANADA.

WRENCH.

Specification of Letters Patent.

Patented June 3, 1919.

Application filed October 5, 1918. Serial No. 257,030.

To all whom it may concern:

Be it known that I, ROLAND JOHN S'ra'r- HAM, a subject of the King of Great Britain, and a resident of the city of Vancouver, in the Province of British Columbia, Canada,

and useful ID1- provements in Wrenches, of which the following is a specification.

My invention relates to improvements in wrenches of the adjustable type, and the object of my invention is to devise a wrench of this character capable of gripping not only the flat sides of a nut but, with equal facility, the corners as well and which need not be removed from the nut when a fresh grip thereon is desired, thereby providing-a tool of great utility, an incidental advantage of which is that it may be used with great convenience as pliers in addition to its use as a wrench.

I attain this object by the construction illustrated in the accompanying drawings in which- Figure 1 is a side view of my wrench.

Fig. 2 is an edge view.

Similar figures refer to similar parts throughout t e several views.

The wrench is formed as shown in Fig. 1 and consists of the usual shank or handle 1 provided with an integral rigid jaw 2 and the adjustable jaw 3 having the tongue 4 slidably mounted in the slot 5 of the head 6, the lower edge of the tongue being provided with threads 7 with which cooperates the worm nut 8, rotatably mounted in the gap 9 on the fixed pin 10.

Up to this point the construction of the wrench is similar to the well-known types of adjustable wrench in which adjustment of the jaws is effected by means of the worm nut 8, this nut, however, in those types being incapable of lateral movement. According to my present invention the gap 9 is made considerably lon er than the length of the worm 8 so that t e worm, and therefore the adjustable jaw 3 also, are laterally movable on the head of the wrench without necessitatin the rotation of the worm, giving slack or p ay, or in other Words, the jaw 3 is loose] mounted on the head so as to be capable 0 lateral movement or play without the screw action required in such wrenches in use at the present time, the operation of the jaw 3 laterally toward the fixed one 2 being controlled by a pressed steel lever 11 pivotally mounted on the head 6 by means of a pin 12 which extends through the jaws 13 and 14 of the lever adjacent their upper ends 15 and 16, these jaws extending on each side of the wrench handle and havlng their upper ends adaptedto engage the end of the worm nut 8, as shown in Fig. 1. The jaw 3 may be retracted manually but if desired its automatic retraction on release of the lever 11 may be secured by inserting in the gap 9 a tension spring 17, as shown in Fig. 1, the worm 8 belng recessed to receive the end of the spring. Both jaws 2 and 3 are provided with oppositely facing notches 18 adapted to fit the corners of a nut, as hereinafter described.

The manner in which the wrench operates will be apparent on reference being had to Fig. 1, as it will be seen that the jaws being open and laced on a nut and the shank 1 and lever 11 gripped in the hand, the hand pressure will close the lower end of the lever on the shank and the upper ends 15 and 16 of the jaws 13 and 14- will thereforebear on the end of the worm 8 and move it laterally to tighten the jaw 3 on the nut so that it may be turned in the required direction. To take a fresh grip on the nut and on the corners thereof the pressure on the lever 11 is relieved and the wrench swung around on the nut until the opposite notches 18 engage the opposite corners of the nut, when the jaws may be again tightened by renewed pressure on the lever. It will thus be seen that the wrench may be worked all around the nut without removal-therefrom and grips taken on the flats and corners alternately, while adjustment of the jaw space to different ranges of nut sizes ma be made in the usual manner by the rotation of the worm 8. V

What I claim as my invention is:

In an adjustable wrench, a head havin a gap, a fixed jaw, a slack laterally slida le aw having a tongue threaded on its lower edge passing through a gap in the wrench head, arotatable worm normally engaging the threaded tongue and endwise movable in the gap and -a fulcrumed lever adapted when grlpped with the handle to bear at 1ts upper end end of the worm and effect endwlse movement of the same, said lever being arranged jso that the point of contact of its upper end above its pivot directly on the

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