US1023001A - Wrench. - Google Patents

Description

H. G. BENNETGH.

WRENCH.

APPLICATION FILED DEG. 20. 1910 amen Wow [Yaw/y (.Zazzmfc/z,

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HARRY c. BENNE'iGH,'OF COCALICO,PENNSYLVANIA.

WRENCH.

Specification of Letters Patent.

Patented Apr. 9, 1912.

Application tiled December 20, 1910. Serial No. 598,324.

To all whom it may concern:

Be it known that I, HARRY C. BENNETGH, a citizen of the United States, residing at Cocalico, in the county of Lancaster and State of Pennsylvania, have invented new and useful Improvements in renches, of which the following is a specification.

This invention belongs to the rack and pinion class of wrenches and its object is to provide a wrench with a quick and simple adjustment and a strong and effective grip. Prominent among its advantages are that itemploys but a strong single leverinstead of small plier-like handles, and that its grip ping mechanism and its adjusting mechanlsm are one and the same, so constructed that it can be tighter adjusted without removing the wrench from the nut or pipe operated upon.

In the accompanying drawings are two forms of this invention, which with several other forms suggest themselves simultaneously when the primary idea of. the invention has been grasped.

Figure 1 is aside elevation partly in section. The numeral 1 thereof refers to the longitudinal bar forming the jaw proper by its right angular offset 2, and provided cogs 3. The bar 1 provided with.its-faivv 2 will be found thus in all wrh ches covered by this patent, but in ceigtain designs the cogs 3 ma be relegated to another bar on the other aw as in Fig. 2 and in some odd forms for special purposes the cogsimaybe found on the opposite side of bar 1. Number 4 represents a housing. This housing, it

will be noted, varies in form somewhat in' the different forms of wrenches. Tli'is housing 4 whether of one piece or of several parts is used to provide a mounting for the jaw 14 to provide bearings for the axle of pinion 5, and to provide a means for mounting the axles of rollers 16 and 17; and the unillustr'ated. bolts and rivets that are required for its firmness and strength. The rollers 16 and 17 are for the purpose of holding the rack bar in a path to engage the cogs of the pinion. As will be noted, in both illustrations rollers are used for this purpose, although arranged diifer ently in their positions. While, inactive sleepers may be substituted in cheaper formsof this wrench, this patent limits itself to rollers 1n the matter of anti-frictional devices for this purpose. Numbe ,8 is a lever for its operation This lei-er has bifurcations 7, telescoping the pinion 5 enabling it to use the axle of said lever as a fulcrum. In all forms of this wrench the lever will; be mounted on the pinion axle and extend no fart-her. The inner jaw will not be mounted on the lever but to the housing or dog. Within the bifurcations 7 is a pawl 9 pressed by a spring 10. This pawl is not limited to any particular shape and in some instances a lever may carry two. A pawl may also be placed 1n the housing to prevent receding movement of the pinion during the reciprocal motion of the lever. Number 11 is a rod for the disengagement of pawl 9. The eyelets 12 are not important and can be dispensed with in instances. Number 13 represents a finger-hold which is no feature of novelty but is included for illustrations sake. While preferably the outer jaw is serrated these specifications do not aim to specify in the matter of serrations.

Fig. 2 has parts corresponding to those of Fig. 1, only that here the inner instead of the outer jaw is the movable jaw which necessitates the addition of the cogged-rack bar 18. Also here theoutec aw instead of the innerjgyvciseo ured to the housing.

()t'her forms may be resorted to without departing from the central theme of the invention viz: that of the pinion and reciproeating lever.

I do not wish to limit myself in detail matters like the location of rivets and bolts for firmness or the certain cut ofthe cogs other than whatI am limited by the patents of other inventions.

What I claim is .1. A wrench, one of the essential parts of which being a toothed wheel, said toothed wheel mounted upon a pinion in a fixed relative position with one of the jaws, the toothed wheel to engage a rack of teeth on the second jaw, so that the revolution of the wheel moves such jaw to a near or far distance from itself according to the direction of the revolution, a single lever for said wheel, the end of which is mounted on the same pintle as the wheel, said lever having means whereby it may be secured to the wheel so that by locking the lever in one direction only repeated reciprocal motion of the same will, through the medium of the wheel, move the movable jaw its entire movable distance.

2. A wrench of the class described comprising a pair of members. one of said memhere comprising a housing formed with a jaw, the second membenbeing also provided with a jaw, anti-frictional rollers within the housing bearing upon the second member, the said housing being provided with :1 ivoted toothed wheel, a handle having a biurcated extremity mounted upon the pinion of the toothed wheel, a dog carried by the handle, means for forcing the dog into or out of en agement with the toothed Wheel, the sec- I on Jaw member having its shank formed with teeth adapted to mesh with the teeth of the toothed wheel, and anti-frictional bear- .ings contacting the upper smooth face of the shank.

3. The herein described construction of wrenches embodying a pair of members, one

of said members having a housing formed with a jaw, the second member beingalso provided with a jaw, anti-frictional rollers bearirl'g upon both of the members, the housing being provided with a pintle, a pivoted toothed wheel upon the pintle, a lever having a bifurcated extremity loosely mounted upon the pintle for the toothed w eel, and a dog carried by the lever, spring means for forcin the dog into or out of engagement with tie toothed wheel, and the first named member having a shank provided with teeth ada ted to mesh with the teeth of the toot ed wheel and to be forced .into contact with the anti-frictional rollers as the lever is reciprocated.

In testimony whereof I aifix my signature in presence of two witnesses.

HARRY C. BENNETCH.

Witnesses:

PHInLIr BRIGKMANN, J on H. FREESE.

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