US1165995A - Wrench. - Google Patents

Description

F. MOSSBERG.

WRENCH.

APPLICATION FILED JUNE 16, 1915.

1 165,995. Patented Dec. 28,1915.

o1 miu PLANOGMPH C(LJVASHLNETON, D. C

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FRANK MOSSIBERG, OF AT'ILEBORO, MASSACHUSETTS, ASSIGNOR TO FRANK MOSSBERG COMPANY, OF ATTLEBORO, MASSACHUSETTS, A CORPORATION OF RHODE ISLAND.

WRENCH.

Specification of Letters Patent.

Patented Dec. 28, 11915.

Application filed June 16, 1915. Serial No. M385.

T 0 all whom it may 0091061 70 Be it known that I, FRANK Mossnnns, a citizen of the United States, residing at Attleboro, in the county of Bristol, State of Massachusetts, have invented certain new and useful Improvements in renches, of which the following is a specification.

lhis invention relates to ratchet wrenches and has for its object to provide such a wrench of very inexpensive yet strong and practical construction, the same comprising a handle formed of a single piece of sheetmetal having a circular opening near one end thereof, in which opening is rotatably mounted a work operating hub having ratchet teeth and a spring pressed pawl mounted to slide endwise in a groove in the handle for engaging said ratchet, by which the hub is rotated step by step upon a reciprocating action of the handle.

With these and other objects in view, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawmgs: Flgure 1-is a plan view of the wrench showing the endwise slidable pawl engaging the ratchet teeth of the work operating member. Fig. 2is an edge view of the wrenclrpartly in section showing the manner in which the pawl operating spring is housed in the slot in the sheet-metal handle. Fig. 3-1s a detail showing a portion of the handle, the c1r cular opening near one end thereof and the radiating slot leading therefrom. Fig. 1- is a detail showing a side elevation of the work operating hub and the ratchet teeth on one edge thereof. Fig. 5.is a section on line 5-5 of Fig. 2 showing the pawl as grooved and mounted to slide endwise in the handle slot. Fig. 6-is a central section through the pawl on line 66 of Fig. 7. Fig. 7is a top view of the pawl.

Referring to the drawings, 10 designates the operating handle of the wrench whlch in this particular structure is preferably formed of one piece and from sheet-stock having an enlarged head 11 at one end, which is provided with a central circular opening 12 through it and a radialslot 13 extending from said circular opening radially into the handle, preferably on the center line thereof. A work operating member or barrel 14L is rotatably mounted within the circular hub opening 12 in the handle. One end of this barrel portion is provided with an enlarged ratchet toothed portion 16 which, while serving as a collar to centralize the hub in the handle also serves to co'o'perate with the pawl presently described to impart a step by step rotating motion to said hub. This hub is, after being positioned in the opening 12 retained therein bya collar 17 over the edge of which the edge 18 of the hub is forced by swaging or otherwise, whereby these parts are securely connected together.

One of the essential features in my improved wrench is the unique and effective manner of slidably mounting thepawlinthe slot in the handle member and at the same time completely housing the pawl operating spring therein. To accomplish this, I have provided a pawl 19 having oppositely disposed longitudinal grooves 20 therein of a width to receive the edge walls 21 and 22 of the radial slot 13 in the handle, and these grooves are arranged to form a bridge or connecting portion 23 between the opposite side members of the pawl. The outer end of this bridge portion has been removed, see Figs. 6 and 'Z', to form a space between the opposite sides of the pawl, which space cooperates with the space in the handle slot which is left after the pawl is positioned therein sufficient to receive the pawl operating spring 24:, which arrangement completely houses or incloses said spring. The opposite end of this pawl is provided with a lip 25 adapted to engage the teeth of the ratchet 16.

In the assembling of the parts of my improved wrench I insert the spring 24c into the space formed in the pawl, back of the bridge member 23, and pass the pawl with its spring through the circular opening 12 into slot 13, where one end of the spring acts against the end wall 26 of the slot and the other end acts against the end wall 27 of the bridge member in the pawl. I then position the work operating hub in this circular opening and secure the same therein by either screw-threading the collar 17 onto this hub or upsetting the stock of the hub over the collar thereby locking the whole of the wrench mechanism operatively together. This work operating member is shown as being provided with a center hexagon opening 28, whereby the wrench may be particularly adapted for use on special nuts, bolts and operating on engine spark plugs or the like,'or the opening may be of a shape adapted to receive the ordinary socket wrench if desired or the hub may be made in any suitable or desired shape or form for being attached or connected to work of any desired character.

I claim: I

1. A wrench comprising a handle portion having an enlarged head atone end provided with an opening, and a slot extending longitudinally of the handle and communieating with said opening, a work operating member having a hub rotatably mounted in said opening, and provided at one endwith an enlarged ratchet member bearing against one side of said head, a collar bearing against the other side of said head, said hub being passed through and attached to said collar, and a spring pressed pawl slidably mounted in said slot, and provided with an offset end for engaging said ratchet, said pawl having bearing faces engaging the opposite surfaces of said handle.

2. A wrench comprising a fiat plate pro: vided with a handle portion and an enlarged head at one end of the handle portion, said handle having a longitudinal slot adjacent the head, a ratchet member rotatably supported by said head, a pawl having opposite side members connected at one end by a bridge piece extended through said slot, said side members being wider than the bridge piece, and bearing against the faces of said plate and closing the slot in all positions of the pawl, and a spring within said slot and bearing against said bridge member, said spring being inclosed between the side members of the pawl.

In testimony whereof I afiix my signa ture in presence of awitness.

' FRANK MOSSBERG.

7 fitness;

HOWARD E. BARLQW.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eaten'ts,

Washington, 'D. C.

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