US956259A - Spanner-wrench. - Google Patents

Description

G. AMBGRN. SPANNER WRENCH. APPLICATION FILED 11:13.11, 190s.

956,259. Patented Apnz, 1910.

2 SHEETS-SHEET 1.

INVENTOR Gr. AMBORN. SPANNER.A WRENCH. APPLICATION FILED 11:11.11, 1908.

P11-,ema Apr. 26, 1910,.-

u G. l F 5.

v INVENTOR il' JNO/'m' 'f V WITNE'SSES:

4rd M ir a 'in if GEORGE AMBORN, 0F NEW lYORK, N. Y., ASSIGNOR TO J'. H. 'WILLIAMS & CO., OF BROOKLYN, NEW YORK, CORPORATION 0F NEW YORK.

SPANNEBAWRENCH.

Application led February 11, 1908. Serial Ita-415,427.

To all whom 'it may concern:

`Be it known that l, GEORGE AMBORN, 4a citizen of the United States, residing in the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements in Spannerfllvren'ches, of which the following is a specification.

This invention relates to wrenches of the Spanner type and aim-s to provide certain improvements therein. v p

The. invention is' particularly Adirected to a wrench in the use of which it is not necessary to bodily remove the wrench from the nut on each reverse stroke. Several wrenches of this general type have been i proposed, but each of these has been open to some objection, either that'of excessive cost of manufacture or of weakness of construction.

According to my invention, l provide a wrench of this type in which the various parts are of strong and durable construction, which is capable of use either with a square nut or a hexagonal nut and which is of cheap and simple construction.

My invention also includes other features p of novelty which are hereinafter referred to.

Referring to the drawings,Figure 1 is -a top or plan view of the head of my improved wrench. Figs. 2 to 4 are more or less diagrammatic views illustrating the action of the wrench in connection with a square nut.

y Fig.l 5 is a view similar to Fig. 2 showing the action of the wrench with a hexagonal nut. Fig. 6 is a similar view illustrating an additional or supplementary means for acting upon the nut. Fig. 7 is an elevation showing the wrench in use.

Referring to the drawings let A' indicate Vthe head of the'wrench and B a suitable handle preferably formed integrally with the head. The head i's' constructed with two 'arms Cv and D,preferably of integral con` struction, the arm C being longer than the arm D as shown. socket between them which is designed to receive the nut, the 'bottom of such socket approaching by preference the `angular form of two contlguous facets of a. hexagonal nut. o A

According to m arm D is form Vinvention `the' shorter with a substantially vstraight active face a, which, as shown in Fig. 3, enga es the lower part of the left hand facet o a Square nut when the wrench Specication of Letters Eatent.

'tically the full The two arms form' a,

Patented Apr. 26, 31910.

is turned in the direction of the arrow. The face a 1s `also adaptedto engage the left hand facet of a hexagonal nut as shown in Fig. 5.

The arm C is provided with a similar 'until it engages the next adjacent,y facet.

I `he bottom of the socket of the wrench, while following in a general way the angle of two facets of a hexagonal nut is neverthef lessof a peculiar formation which aids 'very materially in the operation of the wrench;

By reference to Fig. 3 it will be seen 'that' instead of following the vdotted line d which extends 1n substantially the same direction as a facet. of 'a hexagonal nut, l recess or' deepen the socket as indicated by the full line e. Thefeect of this change is illustrated bythe position of the nut shown in full lines. lts lower right hand corner is enabled to drop a considerable distance farther into the socket, so that its lower left hand corner extends much farther into the socket on the opposite side whereby prac' length of the bearing face a of the short 'arm D is'utilized. If the socket were formed as vindicated by the dotted line d the nut would be .thrown outwardly face a could .be utilized. This would Vnecessitate the lengthening yof -the face a in .a curved face Aso that only the out-er end of the bearing 1 an outward direction a corresponding dstance which would be .a detriment. I also preferably form the adjacent face f of .the

bottom of the socket in such manner as to leave a cam surface as best illustrated in Fig. 4. -This formation of the socket leavesa recess or notch 7 1. conti ous to the working face a of the arm D into which .the corner of the nut can extend. At the same time,on the reverse'stroke of the wrench, indicated by the arrow in Fig. 4, the corner i of the nut rides upwardly on the face g throwing the mit outwardly Vof the soclnet'to a slight extent, thereby permitting desirable that the face a be long enough to have an adequate working surface to engage the nut. Under these circumstances, however, if the cam g were omitted the corner of the nut z' would sink down a proportionateV distance and cause the corner j to bind against the face b of the arm C.

It will be understood that the cam and recess are important and that if these are provided the exact shape of the bottom of s the socket is relatively unimportant. 'It may be modified, among other ways, as shown in dotted lines in F ig. 5. These features are applicable to a wrench designed for operating upon a square nut or a hexagonal nut. The operation of the various features of construction is substantially the same in the case of a hexagonal nut as that just de-v scribed. As illustrated in Fig. 5A the bearing faces b and a form eiiicient contacts with the facets of a hexagonal nut, while the Cam g and recessed socket act to permit the effective gripping of the nut and the easy reversal of the wrench. A very important feature of my invention is that the wrench is capable of acting upon nuts of considerably different sizes, from the full size permitted by the dimensions of the socket to those of much smaller size.

By the construction just described, I am enabled to provide a wrench which moves over the facets of the nut, whether square orhexagonal, with substantially as easy a movement as a ratchet wrench, and with little or no liability of the wrench being thrown ofi' the nut. l At the same time I gain a very important advantage that thearms are not recessed or weakened. To this advantage is added a considerable decrease in cost of construction. The entire wrench may be formed of a single forging and its socket and bearing faces easily and con.- veniently finished'by the use of ordinary tools in one operation. There are no laterall recesses whichcan be finished only with difficulty. In fact the wrench herein can be made as cheaply as the ordinary Spanner wrench.

The wrench may, if desired, be provided with a spring bolt or similar member'su'ch as o (Fi 6) which isl actuated by a spring p of sucient strength to force the wrench slightly away' from'the nut so as to facilitate the reversing. action. This will however not ordinarily be necessary.

Preferably the wrench is. also provided on one side with an oblique face g which is. by preference duplicated on the other side of the wrench. This face is best formed upon a ange or rib r as best shown in Fig. 7. One of the purposes of this construction is also illustrated in this gure. It frequently happens where a series of bolts are used that in screwing on one nut the handle will move over an adjacent bolt or nut. This restricts the use of the wrench and very Yoften causes injury by tearing the hand of In the construction of the wrench the user. described the oblique faces g' form bearing surfaces upon which the head of the wrench works with the handle extended in an inclined position as shown. in Fig. 7. ls enables the Wrench to beworked freely over an adjacent bolt without danger of injury.

Although I have shown in detail one 'form of my invention, I do not wish to be limited thereto as various modifications may be made without departing from the invention. It is obvious that the jaws need not be integral or in fixed relative positions, and that the invention may be applied to other types of wrenches than the form shown. The term spanner wrench is used in the claims t'o cover such types.

What I claim is 1. A Spanner wrench having a short arm adapted to engage a facet of either a square or a hexagonal nut and to'exert a pulling strain thereon, and a long arm of sucient length to engage a diametrically opposite facet of either a square or a hexagonal nut at a point past the middle of such facet in the direction of rotation, and said wrench having between such arms a socket shaped to receive a square or a hexagonal nut while said arms are engaged as set forth, and'said longer arm being straight on its inner side.

2. A Spanner wrench having a short arm adapted to engage a facet of either a square or a hexagonal nut and to exert 'a pulling strain thereon, andl a long arm of sufficient length t9 engage a diametrically opposite facet of either a square or a hexagonal nut at a point past the middle of such facet in the direction of rotation, and said Wrench having between such arms a socket shaped to receive a square or a hexagonal nut while saidarms are engaged as set forth, and said longer. arm being straight on its inner side and said socket having a recess at its bottom on-the side of said longer arm, and a cam at its bottom on the side of said shorter arm.

3. A Spanner wrench having a short arm adapted to engage a facet of elther a square or a hexagonal nut and to exert a pulling strain thereon, and a long arm of sutcient length to engage a diametrically opposite facetv of either a square or a hexagonal nut `at a point past the middle of such facet in 1C and bein face extending forwardly, and outwardly from its inner side and adapted to rook upon 5 movement.

4.' a spanner wrench, a handle and a' head, said head having -two 'arms with a socket between them to receive the nut, one of said `arms being shorter than the other,

formed with a curved face extending orwardly and outwardly from the inner side of the arm, said face 'being adapted to rock upon the nut as the wrench given its reverse movement, and the longer 15 arm being. formed with a substantially straight inner face, the socket between such'v arms being deeper on the side of the longer arm and being provided with a cam on the opposite lside.

gon nuts having a handle and ahead, said head having two'arms with a parallel sided (socket between them, such socket being formed at its inner end to receive -a corner 25 of a heXa-gon nut, but being deeper on-one side than on the other whereby .to form a 956,259'- Y. l ff 5. A spannerwrench for squareand hexa.

s vaeebetween.the facet of the nut `and such l 6.'v A` Spanner wrench .having two 'arms for directly engagmg 'a nut, a soeketi'bej tweenv such arms, and a spring-operated means for, ressing the wrench awayfrom said nut, w` ereby to facilitate'reversal of the wrench. f `7'. A's anner wrench having a handle and;

,side ofthe socket, andhaving a camon the 'opposite side of such socket. 1

the nut as the wrench is given its reverse` u '30.

a' head Arlgidly' xed thereto, said head havl ing two jaws forming a socket between them and havingxa flange or rbw' of less width than-the head, said rib'extending alon both scribing witnesses.

4Witnesses EUGENE V.. M YERs,

Trreopona T. SHELL.

4o said arms and around said socket, an haveatest height atV the inner'end of GEORGE AMBoRN..

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