US701951A - Wrench. - Google Patents

Description

Patented lune I01 |902.

No.7o|,95|.y 7 e w. sHlRK.

wnENcH.

(Application tiled June 10, 1901. l

l(No Model.)

6 Wizz-mm furz.

in all the views 0I' the drawings by the same UNITED STATES.

WILLIAM sHIRK, or PANAMA, IowA.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 701,951, dated' lume '10, 1902.

Application filed .Tune 10. 1901.

.To a/ZZ whom it may concern:

Be it known that l, WILLI-AM SHIRK, a citizen of the UnitedStates, residing'at Panama, in the county of Shelby and State of` Iowa, have invented certain new and useful Improvements in Wrenches; and l do hereby declare the followingto be a full, clear, and ex act description of the invention, such as willv enable others skilled in the art to which it appertains to make and use the same.

This invention relates to wrenches of the alligator type, and aims to provide a simple, novel, and eective means for positive actuation of the jaws to adjust them to grip different sizes of nuts, rods, or other objects required to be turned by force.

For a full description of the invention and the merits thereof and also to acquire a knowledge of the details of construction of the means for effecting the result reference is to be had to the following description and drawings hereto attached. ,l Y

While the essential and characteristic fea-r tures of the invention are necessarily susceptible of modification, still the preferred ernbodiment of the invention is illustrated in the accompanying drawings, in which- Figure 1 is a plan view ot'A a wrench embodying the invention. Fig. 2 is a View similar to Fig. `1 with the cap-plate removed. Fig. 3 is a transverse'section on the lineXX of Fig. 1. Fig. 4 is a central longitudinal section.

Corresponding/and like parts are referred to in the following description and indicated reference characters.

The stock or frame l is widened at one end to receive the operating parts and is con-` tracted at the oppositeend to provide a handle and has an opening extending inward fromv the widened end to accommodatel the jaws vand the adjunctive parts. Plates 2are` secured to theY opposite sides of the stock or frame to close the opening thereof and retainthe working parts in place.

The jaws 3 are arrangedlengthwise of the stock or frame and are pivoted at a point between their ends to thepla.tesf2,the ,opposing or proximal edges of the inner end portions of the jaws iiaring, so as to receive between them a wedge or cam 4, by means of- Serial No. 64,012. (No model.)

which the inner ends of the jaws are forced apart and their outer ends caused to approach more orless closely, so as to grip an object of `given size. the jaws are toothed or serrated, so as coprevent slipping and enable the jaws to obtain The inner or gripping edges of a 'rm hold of the object to be turned. Flat springs 5 are secured at one end to shouldered portions of thestock or frame and have the opposite end bearing inward upon theiny ner end portions of the jaws 3, so as to press said ends together wheny withdrawing the cam or wedge 4 from therebetween. The jaws 3 correspond in. thickness to about the thickness of the stock or frame, so as to lie in the plane thereof and prevent binding between the plates 2 when the latter are rmly clamped `against the sides of the stock.

v The `wedge or cam tis, provided at one end with a set-screw o'rthreaded stemt', located fin the inner end portion of the opening formed in the stock or frame, opposite sides being plain;so,asto come between the plates 2 and lwithin the plane of thesides of the'frame 1.

s`et-screwftovar'y the distance between the outerends'of the jaws 3. The nut is milled or otherwise roughened to facilitate its turning when desired. A pin 10 passes transversely through the wedge or cam 4, and its ends enter longitudinal slots 11, formed centrally in the side plates 2, .whereby the wedge is centralized and prevented from lateral displacement. The wedge or cam 4:,being causedY `to move in a straight line and held from lateral displacement, fixes the position of the jaws 3 with reference to the stock or frame and insures their 'occupying a central positionwith reference to the stocker frame at vall points of adjustment.

' The stock or frame may be readily cast, stamped, or drop-forged, and the same is true of the remaining parts, and the construction 7is such that the elements can be readily as- IOO sembled and are accessible at any ltime for repair or other purpose.

Having thus described the invention, what is claimed as new is- The herein-described wrench comprising a stock or frame of uniform thickness throughout its length and breadth having one end contracted and constitutingahandle and having its opposite end widened and provided with a slot extending inwardly and opening through opposite sides of the stock, said slot being ared at its outer end, contracted at its inner end and widened at a point intermediate the ends of the contracted part, plates secured to opposite sides of the stock and closing the sides of the slot thereof and havinglongitudinal slots and openings in coincident relation,jaws pivoted between the plates, springs secured to the stock and exertingr an inward pressure upon the inner end of the jaws, a threaded stem located in the inner contracted end of the slot formed in the stock and having a cam or wedge to enter between the inner ends of the jaws and having eXtensions to operate in the longitudinal slots of the aforementioned plates, and a nut mounted upon the threaded stein and arranged to operate in the widened portion of the aforesaid slot of the stock and having opposite portions projecting through the openings in the side plates, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM sI-IIRK. [n sj Witnesses:

L. H. CRANE, C. F. BAUMEISTER.

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