US1390408A

US1390408A - End-wrench

Info

Publication number: US1390408A
Application number: US420202A
Authority: US
Inventors: William S Webber
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-10-28
Filing date: 1920-10-28
Publication date: 1921-09-13
Anticipated expiration: 1938-09-13

Description

W. S, WEBBER.

END WRENCH.

APPLICATION FILED OCT. 28, I920.

Patnted Sept. 13, 1921.

UNITED STATES":

WILLIAM s. WEBBER, OF CHICAGO, ILLINOIS.

END-WRENCH.

Application filed October 28, 1920. Serial No. 420,202.

To all whom it may concern Be it known that I, WILLIAM S. WEBBER, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in End -'Wrenches of which the following is a specification, referencebeing had to the accompanying drawings, and to the reference characters marked thereon, which form a part of this specification.

This invention relates to improvements in end wrenches. I

When one desires to manipulate a nut or a bolt, it frequently, happens that the parts are so firmly secured together by friction or rust as to make it necessary to use two wrenches-one applied to the head of the bolt I and the other to the nut. It also frequently happens that itis very awkward for the operator to hold one wrench on the bolt head, while manipulating the nut with the other wrench, as for instance, where the bolt head is underneath a projecting part, as in an automobile, or any other situation where it is desirable for the operator to have one free hand to use.

To overcome these andother difficulties,

I I have provided an end wrench with a construction whereby when the jaws of the wrench are passed about the two opposite and parallel sides of a bolt head, the wrench will be locked or. cramped in position and will be self-supporting; that is,l will not'require the operators hand to ho d it in posi- .tion.

. The accomplishment of this object and in 7 order to provide a cheap, simple and effective end wrench, are the principal objects of my invention; the furtheradvanta es of which will become more apparent as proceed with my specification.

In the form of the invention which I have chosen to illustrate in the accompanying i drawings, Figure 1 is a side view of a double 7 g j I i the shank 1' by meansof a locking linkilG. This link 16 is composed of a wire piece bent headed wrench, one end of which is provided with my improvement.

Fig. 2 is a similar view showing the lockin device released.

Fig. 3 is a transverse,,vertical, sectionalstance provided with two'end wrenches, B

Fig. 7 is'a side View of the wrench prjovided with two different modifications of the improvements shown in F igs; 1 and2. v

Figs. 8, 9, 10, 11 and'l2 are vertical transverse sectional views of the'wrench shown in Fig. 7 the same being taken in the planes of the dotted'lines 8+8, 9'9, 10-10, 11%"1-1, and 1212 respectively. 1

'Referring' now to the wrench as shown in Figs. 1 to 6, inclusive,-IA represents the end wrench as a whole, the same beingcomposed of'a shank or handlemember 1, in this in- C. Each wrenchB, C, is provided with a pair of jaws, 2, 3, which jaws are formed by recessing the end of the wrench and providing parallel si'de'faces 4, '5, joined a third face 6, at their innerendsi The jaw 2 of the head B is centrally split orsl'otted,

as indicated at.7, and in this slot or space is positioned the locking member'S of a lever 9. The lever 9 is pivotally attached; to the headB by means of the bolt or pin 10. The lever 9 is'made of a relativelythin and narrow bar, bent at ll'so that its major width will stand in a ying longitudinally within the concave under surface of the handleof'this lever 9 is a spring 12, its forward end being bent'downwardly to form a prong 13 fitting in a suitable and vertically disposed aperture in'the shank or handle 1, as indicated in Figs 2 and 4. The normal position of the spring 12 will be as indicated in Fig.2; that is .to say, the

plane at right angles to or across the slot 7.

jplortion of the wrench shank. or handle 1.

rear end 14 will press the outer or free end pressed position of the .lever S) as indicated in F ig, 1, itsrear endl5' isheld down upon between its ends so that the two ends 17 enter suitable recesses 18 in the shank 1 of the wrench. In the upper edge of the shank 1 of the wrench is a longitudinally arranged groove 19 (see Fig. 6, and as indicated by the dotted line in Fig. 2).

. of the lever 9 upwardly, rotating said leverj" .upon the pivotpi'n or bolt 10. In the comrecess 19. When the side walls 4, 50f the

jaws

2, 3, encompass a bolt head or nut and. it is desirous of locking the wrench to said bolt head or nut, the locking link 16 is slipped ofi from the end of the lever 9. The lever 9 is then, under the influence of the spring 12, actuated about its fulcrum or pivot 10 and the face of its "forward end brought into the recess. The face 20,

shank 1 and bear against the lever 28. The v wire ends 29 are bent inwardly and enter' thus extending beyond the wall 4:, is cramped against the face of the nut or bolt head. The wrench and the nut or bolt head are thus locked together by thev tension of the spring 12 which exerts a friction hold greater than the dead Weight of the wrench. The operator may thenrelease his hands from the wrench and proceed with any other manipulation of the machinery. If the formation of the lever slot 7 have "any tendency toweaken the wrench end B, or particularly the jaw 2 thereof, this may be overcome by making one part of the end B thicker than the other part. This is indicated by the raised up

lugs

22, 22, shown clearly in Figs. 1, 2 and 3.

The end C of the wrench is made toac-- commodate-a nut or bolt head of a difierent size from the end B- 'The end C may be made precisely as the end B and similarly provided with a lever 9 and spring 12, alv though this construction is not shown, as Ia matter of convenience in drafting.

In the modification shown in Figs. 7 to 12, both ends B and C are shown as provided with spring actuated locking levers and with looking links for holding the levers in position. The lever indicated at 23 differs fromthe lever 9 in that it is relatively fiat and narrow, and not concavo convex in cross section, and rests upon the free end of a flat or leaf spring 24. This spring 2i. may be secured in a recess on the shank 1 ofthe wrench. Said wrench is rounded at its upper end 25 and differs from the shank illustrated in Fig. 1 in that it is not provided with the recess 19.

The other modification shown in Fig. 7 and in Figs. 9-12 inclusive, embraces a wire bent between its ends so that its transverse bent portion 27 will be beneath the suitable recess in the shank 1 near the head B. This wire is U-shaped and its two side 7 jaws at one end members 30 extend one on each side of the shank 1 of the wrench. Each side member 80 passes through a wire loop 31 secured in the shank 1, as more clearly indicated in Fig. 7 and 10.

Various modifications and changes may be made in the details of construction, the principle of the invention being observed when an open end wrench is provided with a recessed jaw in' wh'ich the short arm of a pivoted 0r fulcrumed lever is positioned and which jlev er is spring actuated.

I claim as my invention:

1. Theimprovement mend-wrenches comprising a shank member of generally oval form in cross section having a groove in its margin extending longitudinally of the shankand having a pair of nut engaging of the shank, one of said jaws being slotted, a. pivoted lever fulcrume'd in sail slotted jaw, the handle end ofthe lever extending over the grooved. margin of the shank land being concaved' in cross section to form agroove complementa'l to the shank groove, a resilient member positioned in the grooves between said lever and shank, secured at one end to the latterand adapted to operate the lever, and means for locking the lever against movement.

2. An improved'end-wrench comprising a shank or handle member, a pair of jaws the inside faces of which "constitute "parallel walls adapted to "engage the opposite sides of a nut or bolt head, one'of said jaws being slotted, a pivoted lever fulcrumed in the slotted j aw,one end of said lever being pro vided with an engaging surface adapted to be moved into the space between said jaws,

the other end of said lever constituting a handle portion extending longitudinally of the shank member of the wrench, means associated-with said handle portion and the shank for actuating the handle portion away "fromsa'id shank and a movable lock on the shank adapted to engage the lever.

In testimony that I claim the-foregoing as my invention 1 aiiix my signature, in the presence of two witnesses, this 25th day of October, 1920; a I

WILLIAM s. WEBBER.

WVitnesses:

' TAYLOR BROWN,

B. L. MACGREGOR,