US688796A - Wrench. - Google Patents

Description

' No. 688,796. Patented Dec. l0, I90l.

F. SEARLE.

W R E N 0 HI (Application flled Apr. 6, 1901. '1

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FREDERICK SEARLE, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO LORING COES dz COMPANY, INCORPORATED, OF W'ORCESTER, MAS- SACHUSETTS, A CORPORATION OF MASSACHUSETTS.

WRENCH.

C I N gorming part of Letters Patent No. 688,796, dated December 10, 1901.

Application filed April 6, 1901.

T0 (0Z5 whom, it may concern:

Be it known that I, FREDERICK SEARLE, a citizen of the United States, residing at Worcester, in the county of WVoreestcr and State of Massachusetts, have invented new and useful Improvements in Wrenches, of which the following, together with the accompanying drawings, is a specification sufficiently full, clear, and exact to enable persons skilled in the art to which this invention appertains to make and use the same.

My present invention relates to a peculiar construction of the wrench-bar shank and to the construction and arrangement of the handle-frame; also, to the manner of combining the members, as hereinafter explained, the objects being to obtain a rigid union of the parts and to produce a stronger, more perfeet, efficient, and desirable wrench; also, to facilitate the manufacture of the same.

This invention consists in a screw-wrench having its handle-supporting shank and handle-frame formed and combined essentially as defined in the following description and claims and illustrated in the drawings, wherein- Figure 1 represents a side vie wot a wrench embodying my improvement, the outer portion of the handle being removed to show construction of the handle-frame. Fig. 2 is a longitudinal central section of the handleframe, with dotted outline indicating the shape of the handle; Fig. 8, a side view of the bar-shank; Fig. 4, a transverse section of line W WV on Fig. 2; Fig. 5, a transverse section of the handle-frame at line X X on Fig. 1, and Fig. 6 a cross-section of the wrenchbar shank at line X V on Fig. 3.

Referring to parts, A denotes the wrenchbar, having the usual fixed jaw or head A, the partially-rounded neck a, with collar-positioning shoulders d and a broad handlesupporting shank A of the peculiar improved form hereinafter specified.

B denotes the sliding jaw, mounted on the wreneh-bar; C,tl1e usual jaw-adj usting screw, having the rosette or head C, and D indicates the ferrule or collar, which is an integral portion of the handle-frame F, and G the scales or side plates that give form to the handle.

In my improvement the bar-shank, which Serial No. 54,590. (No model.)

is laterally reduced from the thickness of the main part of the bar, is formed with its broad side faces 3 transversely convex or outwardly rounded with a regular but moderate curvature, the central portion being of greater thickness of metal than along the front and rear edges 4 and 5, giving a somewhat oval cross-sectional shape from the reducing-shoulders at the neck a to the lower end of the barshank, as shown in Figs. 3 and 6. The sides are longitudinally convergent or slightly taper toward the end, which terminates in a short oval tang a for the attachment of the tip or end piece II. The front and rear edges 4 and 5 of the shank are longitudinally parallel from the collar-positioning shoulders cl to its end and are milled elf on a circular curve transversely, the portion ct, that fits within the collar, being left the full thickness of the bar, as heretofore employed.

The handle-frame is made with the collar D integral with edge portions or ribs F, extending to the end piece H of the handle, which edge portions are best made to correspond with the thickness of the bar-shank A their inner faces 6 fitting the edges 4 and 5 of the shank and their outer edges 8 conformed to the outline of the handle-surface. Said edge portions F are notched across their lower end on the outer faces, so as to engage under the lip of the end piece H, as at 9, Fig. 1.

Upon the opposite sides of the handle-frame I provide outwardly arched or rounded webplates 10, formed integral with the edge portions F and extending from the lower end of the collar-rim 11 nearly to the lower end of the frame. Said webs bridge across the shankreeeiving space 12 and are outwardly arched to match the convex cross section of the wrench-barshank,as shown. The Webs unite with the edge portions F on parallel lines at 15, and the exterior of the handle-frame presents at either side a longitudinally-straight transversely rounded central surface With flat marginal surfaces upon which the side scales G are seated. The integrally-attached edges of the webs 10 meeting the fiat surfaces of the edge portions F with a rounded raised contour forms offsets at 15, that prevent edgewise displacement of the scales G when assembled on the handle-frame. The lower end of the collar is cored out between the rim 11 and the end of the webs for the reception of the tenon on the end of the scales or handleplat-es G, which plates can be secured to the frame in any suitable well-known manner. An opening 16 is formed through the web 10 and bar-shank A preferably of a form to receive a key-pin formed of flattened wire, as illustrated in Figs. 1 and 3.

By the transversely-convex structure of the broader side faces between the parallel front and rear edges, giving to the wrenchbar shank an oval cross-section, and providing the handle-frame with opposite trans versely-arched webs integrally uniting the horizontally-parallel inner angles of its edgefitting portions by regular bow'curves across the interspace at both sides of the frame I produce a very rigid and strong unification of the shank and handle, since the peculiar conformation causes the curved side webs to hug firmly upon the outwardly-convex surfaces 3 of the bar-shank as well as on the rounded or parallel edges 4: and 5, and the forcing together of the slightly-converging oval parts renders the contact and fit of the adjacent surfaces comparatively perfect and solid, thus materially increasing the strength and durability of the wrench-handle struc ture, while the form of the parts is such that they can be produced and prepared for assembling with economy and practical facility in manufacture of the wrenches.

What I claim, and desire to secure by Letters Patent, is

1. In a wrench of the character described, the improved wrench-handle frame having front and rear edge-filling portions leading from the collar-ring with longitudinally-parallel inner edges extending approximately oppositely transversely arched webs forming regular outward curves across the breadth of the interspace, and integrally attached to the inner angles of said ed ge-fillin g portions, from the collar-ring to near their extremities; in combination, with the wrench-bar having its reduced wrench bar shank formed on its broader side faces transversely convex, and adapted to longitudinally and laterally fit the interior surface and oval curvature of said handle-frame webs, substantially as shown and described.

2. A wrench comprising, in combination as described, a handle-frame composed of a oollar portion with integrally-attached front and rear edge portions extending, with interior parallel edges and interspace, to the end piece of the handle; said edge portions being integrally joined together at both their respective sides approximately their entire length, by outwardly-arched plate-webs disposed in opposite transversely-curved arcs as shown, and. a wrench-bar provided with collar-positioning shoulders, a collar-seating neck, and a parallel-edged laterally-reduced bar-shank having transversely convex side faces conforming to the arcs of the inner curved sur faces of said arched webs, substantially as set forth.

Witness my hand this 4th day of April, 1901.

FREDERICK SEARLE.

Witnesses:

CHAs. H. BURLEIGH, FRANK L. Cons.

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