US1038846A - Wrench. - Google Patents

Description

B. BQ CALDWELL;

WRENCH. APPLICATION FILED IBBIJ, 1911. RBNEWBD JULY 11, 1912.

Patented Sept. 17, 1912.

UNITED lseveras PATENT onirica. J

BENJAMIN B. CALDWELL, 0F CULDESAC, ILAHO, ASSIGNOR Ol? ONE-HALF T0 WILLIAM B. KELLER, 0F CULDESACQIDAHO.

WRENCH.'

Application' filed February To all 'whom t may concern y ille it known that I, BENJAMIN B; CALD- WELL, a citizen of the United States, resid ing at Clildesac, in the county of Nez Perce and State' of Idaho, have invented certain new and useful Improvements in Wrenches, of which the following vis a speciCatiom This invention relates to wrenches of the slidingjaw type and has for its object the provision` of av comparatively simple and thoroughly etlieient device of this character, the construetion'of which issuch that 'tool. j .I .v -4

A further object is to provide a wrench the movable jaw thereof may be quickly adj usted into engagement with a nutor other .object and securely held against-.accidental the operation of thev displacement during inelndinga shank .ha'ving a movable jaw slidably mountedtherein and provided'with aglever adapted' to grip the shank-andl clamp the-movable jaw 1n engagement after said jaw'has heen moved in contact with the work.

A further object is'to provide a Wrench,

the movable jaw of which is split longitudinally so as to eompensatefor any Wear on the cam surface of the lever.

A still further object of the invention is generally to improvethis class of devices so as 'to increase theirl utility, durability 'and etiieiency. Y

Further objects 'and advantages will appear in the following description, it being understood that various changes `in form,

propm'tions and minordctails of construction may the `appended claims.

For-a full understanding ofthe invention and the merilsthereof, reference is' to he had tothe following 'description and aceompanying drawings, in which:

Figure 1 is a perspective view of a' wrench constructed in'aeeordanee with my invention, showing themovahle jaw thereof' locked in adjusted position; Fig. 2 is a side elevation partly in section,- showing the lever releasedl to permitadjustment of the i'novahlejaw; Fig. 3 is a'longittulinal sectional view of Fig. 1 g ,l"ig. 4t is a transverse sei-tional .view taken'o'n the line 4f 4 of Fig. I and loolingin the direi-,tion ot the arrow; Vig. 5 is a transverse sectional View' taken on the line 5 --of ltig. l.. y I

(orres|mnding and-like 'parts are refer-mid .vided therewith be resorted to within .the scopeofto' in the following description` and indisame reference characters.

The improved Wrench forming' the subjectl matter of the present invention comprises a longitudinally ,disposed having one end thereof provided With a disposed. shoulders. 8

to form oppcsitely operating handle.

'for .engagement with an shank 1 5 Specication'of Letters Patent. l Patent-,0d Sept, 1912, 2.5, i911. serial No. 610,902. 5 Renewed July 11, 1912. serial No. 708,934. i

cated inail the views of the drawings by `the fixed'jaw 6 and its other-end reduced at 7 The handle is' preferably formed in twosections 9 and 10, having openings therein and adapted 'to register with vcorresponding 'openings 11 formed in the reduced fendnof the shank to ypermit the passage lof bolts or similar fastening devices 12. Theopposite longitudinal edges of the shank 5, are proing a slot 14. formed on. one 'edge of the shank and'intersecting the adjacent teetln-as shown. Slidably mounted on the shank 5,

:is agmo'vable jaw 15, the side Walls of which with teeth lor serrations 13, there beare split longitudinally at 16 and provided with'xmpositely disposed openings 17 communicating with the slot'l to form Telatively thin-spring arms 18. terminating .in enlarged heads The Yrear Wall of the movable jaw 15-is i.

providedfwith a transverserecess 20--commu'nicatingwith the bore 2l of said jaw, so as .to expose the adjacentteeth .on the shank 4and also' to reduce the thicknessof the' arms 18, `thus permitting the latter to yield for the purpose hereinafter referred to.

the heads l5), isa` leverf22,having` oppositely disposed trunnions 23, which latterfit ineorrespondingly shaped openings formed-l.

in the heads 19. lf desired, however, a bolt or similar fastening device may be employed for connecting the lever to ,the spring arms 'instead of the trunnions.

4 The inner endof the lever 22 is provided With a'centrally .disposed rib 24 having a cam surface for 13 when said lever isinovcd to operative and inoperative positions.'

The-,inner Wall of the bore 2l at the per end of the movable jawaiud at. the rear.

Piv'- yotally mounted between the inner faces-of,

of the wrench. is formed with transverse teeth or serrations 26 adapted to engage the adjacent teeth 'on the rear longitudinal edge of the shank, while thewall of the bore at the front oi the movable jaw is `formed with similar teeth 27 for engagement with the teeth on the other longitudinal edge of 'the shank, said teeth 26 and 27 being disposed in different planes, as shown.

The lever 22 is preferably ot' less length than the movable jaiv15 sothat When the lever is moved to operative posit-ion, said lever ivill lie wit-hin the recess 20 and thus not present any surface projection at the rear face oli the Wrench. The tree end ot the iever 22 is preferably bifureated to form terminal lips 28, by means of which the lever may be conveniently grasped with the lingers andl disengaged from the teeth on the shank. f

In operation, the lever 22 is sivung outwardly atsubstantially right angles to the arms 18, which movement of the lever disengages the cam tace 24 from the recess 14- so as to permit the movable jaw to be ad.- justed longitudinally ,of the shank and into engagement with a nut or other object. By moving the free end of the lever 22 in the direction of the shank, the cam tace of the rib 24 vwill bear against the Wall of the recess 14, thus moving the lower end of the movableV jaw laterally on the shank and causing the teeth 26 and 27 to grip the adjacent, teeth on said shank and ettectually hold the movable jaw against accidental displacement during the operation of the tool.

ItA Will here be noted. that the spring arms 18 not only-assist in holding the lever in operative position, but by reason of their resilient properties, also serve to compensate for any' Wear on the cam face of the rib 24 after the wrench has been used for `any length of time. The spring arms 18 also permit the use of a larger cam4 and dispense with the employment of separate springs and auxiliary lever holdingr devices. lt will also be noted that' as the lever 22 is moved in the direction of the recess 20, the Walls. of the movable jaw at the Split portion thereof will be slightly separated and thus exert an outward pressure on thepivoted end of said lever, which pressure has a tend.- eiicy to hold the free end ,of the lever Within the recess 20 until manually released to effect a further adjustment of said movable jaw.

Having thus described the inventioi1,Wl1at is claimed as new is:

l. A Wrench includingashank,a movable jaw slidably mounted on t-he shank and provided with resilient arms, and a cam lever pivotally mounted on the arms and adapted to engage said shank for holding the movwith transverse teeth, a movable jaw split longitudinally to form spring arms slidably teeth, and a lever pivotally mounted on the arms and adapted to engage the shank for forcing the teeth on said movable jaw into engagement with the teeth on the shank.

3. A .Wrench including a toothed shank, :i movable jaw slidably mounted on the shank and provided with oppositely disposed sets of teeth arranged in different planes and adapted to'engage the teeth on the shank, said movable jaw being split longitudinally to ferm movable arms, and a lever pivotally mountedy on the arms of the movable jaiv and having a cam surface adapted to bear against the shank for holding the movable jaw in different positions of adjustment.

4L. A Wrench including a shank, a movable jaw slidably mounted on the shank and having its side Walls split longitudinally to form oppositely disposed resilient arms, and a lever pivotally mounted on the free ends of said arms and movable into engagement with the shank for holding the movable jaw in dii'erent positions of longitudinal adjustment.

5. A Wrench including a shank having its opposite longitudinal edges provided with transverse teeth, there being a longitudinal recess formed in one edge of the shank and 9 intersecting the adjacent teeth, a movable jawslidably mounted on the shank and having teeth adapted to engage the-teeth on said shank, the side walls of the movable jaw being split longitudinally to form oppositely disposed spring arms, and a lever'- pivotally mounted between the spring arms and provided with a rib having a cam surface adapted to bear against the wall of the recess.

6. A wrencliincluding a shank, a movable jaw slidably mounted on the shank and having its side walls split longitudinally and provided with openings defining oppositiely disposed spring arms terminating in enlarged heads, and a lever pivotally mounted between the heads of the spring arms and provided with a cam face adapted to bear against the shank for holding the movable j aw in different positions of longitudinal adjustment.

7. A wrench including a shank having a fixed jaw and provided with oppositely disposed transverse teeth, there being a longitudinal recess :termed in one side-of the shank and intersecting the adjacent teeth, a movable aw slidably mounted on said shank and having its side Walls at one end thereof split longitudinally to form oppositely disposed spring ai'ms, and a lever pivotally mounted between: the spring arms and provided With a Ycentral rib having a cam face adapted to bear against the wall of the recess :tor clamping the movable jaw in different posit-ions ofadjustment, the pivoted end of the lever on opposite sides of the rib being curved so as t-o clear the adjacent teeth when said lever is movedto operative position.

8. A. Wrench including a shank 'having a fixed jaw and provided at .its longitudinal edges vvithv transverse teeth, there being a longitudinal recess formed in one side of the shank and intersecting the adjacent teeth, a movable 'jaw having a longitudinal bore :for thereception of the shank, the opposite Walls of which bore are provided Wi'th teeth adapt ed to engage the'teeth onsaid shank, the side Walls of the movable jaw being split longitudinally vfora portion of their length and provided with openings defining oppositely disposed spring arms having enlarged heads, there being a recess formed in one face of the movable jaw to exposel the adjacentteeth on the shank, and a lever having its inner end pivotally mounted between the heads of the spring arms, the pivoted end of the lever being provided Witha cam face adapted to engage the Wall of the longitudinal recess and having the material on each side ofthe rib cut-away to produce a curved surface, the vfree end of the lever being housed Within the recess in the rear face of the movable jaw when said lever is in operative positio 9. A Wrench including a shank, a movable jaw slidably mountedon the shank and hav; ing its side longitudinally to form oppositely disposed spring arms, there being a transverse recess formed in the movable jaw, and a lever pivotally mounted between e spring arms and having a cam face adapted to bear against the shank for holding said mov-able jaw in dfferent positions of longitudinal Iadjustment, said lever being housed Within the recess in the movable jaw when the lever is in operar tive position.

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

BENJAMIN B. CALDWELL.

Witnesses:

A. J. GoGGANs, TL W. SHUFFLER,

Walls at one. end thereof split

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