US1492747A - Wrench - Google Patents

Description

G. J. QUICK May 6 1924.

WRENCH Filed Nov. 11. 1922 Patented May 6, 1924,

MT j s T 2 GREGORY J.' QUICK, or MARSHALL, MICHIGA WRENCH. a

Application filed. November 11, 1922 Serial 1 T -o.-G00, 317:

To all whom it may] concern:

.Be it known that I, GREGORY J. QUICK,-

a citizen of the United States, residing at Marshall, in the county of Calhoun and State of Michigan, have invented certain new and useful Improvements in Wrenches, of which the following is a specification.

This invention relates to an improved wrench and seeks, as one of its principal objects, to provide a device of this character which may be used and adjusted in the manner of an ordinary monkey wrench but wherein the movable jaw of the wrench may be forcibly urged to clamp the work between the wrench jaws and prevent slipping of the wrench.

A further object of the invention is to provide a wrench embodying a lever for shifting the movable jaw and wherein the lever may be grasped for swinging the wrench so that the pressure exerted for turning the work will be communicated to the movable jaw for clamping the work between the wrench jaws with corresponding force.

And the invention seeks as a still further object to provide a wrench which will be simple in construction and may accordingly be produced at moderate cost while, at the same time, the wrench will prove entirely satisfactory and efficient in practical use.

Other and incident objects will appear hereinafter.

In the drawings:

Figure 1 is a side elevation of my improved wrench, parts being broken away and illustrated in section, and

Figure 2 is an edge elevation of the wrench.

Referring now more particularly to the drawings, it will be seen that my improved wrench embodies a shank 10" formed at one end with a fixed jaw 11 while the opposite end of the shank provides a handle 12. Formed on the shank at its forward edge above the handle is a longitudinally directed lug 13 and resting against said edge of the shank lying flush therewith is a rack bar 14 provided at its lower end with a lug 15 slidably fitting behind the lug 13. As will be observed, the upperend portion of the shank is reduced in thickness to accommodate the rack bar so that the rack bar lies within the lines of the shank and slidably embracing the shank to receive the rack bar therethrough is amovable jaw 16 f fitin ahejaw 11.? If desired, th e working faces'of these jaws may be serrated.

Jour'na'l''d upon the movable jaw is a worm 17 accommodated in a. suitable notch in the forward edge of the jaw and extending through the worm is a pin 18 threaded into the jaw rotatably connecting the worm therewith. to coact with the rack bar 14.

Swingingly mounted upon the shank 10 at the upper end of the handle 12 is a lever 19 extending at the rear edge of the shank. This lever may be pressed from suitable sheet metal and, at its upper end, is formed with spaced ears 2O straddling the shank. Extending through said ears and through the shank is a rivet or other suitable fastening device 21 pivotally connecting the lever with the shank and formed in the ears on an arc eccentric to the pivotal axis of the lever are oppositely disposed segmental slots 22. Extending through said slots and through the lower end of the rack bar 14 is apin 23 connectingthe lever with the rack bar, the pin being headed at its ends to prevent displacement thereof, and secured at its upper end to the rear edge of the shank 10 is a longitudinal curved spring 24 bearing at its free end within the lower end portion of the lever normally holding the free end of the lever away from the handle 12 of the shank.

As will now be seen in view of the foregoing the worm 17 may be manually rotated for adjusting the movable jaw 16 of the wrench'toward or away from the jaw 11, the spring 24 acting upon the lever 19 for normally holding the rack bar 14 at the limit of its downward movement along the shank. Accordingly, the wrench may be readily adjusted to engage the work when the lever 19 may then be grasped for swinging the wrench to turn the work. Pressure will thus be exerted upon the lever so.

that the lever will be rocked upon the shank 10 with the result that the rack bar 14 will be shifted upwardly along said shank causing the movable jaw 16 to be moved upwardly therewith for clamping the work between the wrench jaws. Thus, slipping of the wrench will be eifectually prevented and, as the pressure upon the lever 19 is increased, the movable jaw will be advanced for clamping the work between the jaws with corresponding force.

The movable jaw will, of course, retain the rack bar upon the wrench shank while the coacting lugs 13 and 15 of the bar and shank will sustain the lateral thrust of the lever when the lever is rocked.

Having thus described the invention, what is claimed as new is:

A wrench including a shank provided with a fixed jaw, a rack bar shiftable endwise upon one edge of the shank toward and from the baSe of said jaw, a movable jaw slidable along the shank and freely embracing the rack bar, adjusting means for the movable j aw carried thereby to 00- act with said rack bar, a lever having ears straddling and pivoted to the shank and provided with slots eccentric to the pivot, a pin extending through the rack bar and engaging in said slots whereby to shift the rack bar and advance the movable jaw when the lever is rocked toward the shank, and yieldable means holding the lever normally in divergent relation to the shank.

In testimony whereof I afiix my signature.

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