US740812A - Interchangeable wrench. - Google Patents

Description

PATENTED- 00:13.. a, 1903 o. E. GOVAR. I INTERGHANGEABLB WRENCH.

APPLiGATIOH FILED APR. 17, 190?.

10 MODEL.

INVENTOR=' WHNESSESE- M Mm ML ATTORNEY.

m: "cams PEYERS co mormumq. WASHKNGTDN. n. c.

Patented October c, 1903'.-

PATENT OFFICE.

OLIVER n. oov'An, or NEWARK, NEW JERSEY.

INTERCHANGEABLE WRENCH.

SPECIFICATION forming part of Letters Patent N 0. 740,812, dated October 6, 1903.

Application filed April 1'7, 1903.

Serial No. 153,008. (No model.)

To aZZ whom it may concern;-

Be it known that I, OLIVER E. COVAR, a citizen of the United States, residing at Newark, in the county of Essex and State of New Jersey, have invented and produced a new and useful Improvement in Interchangeable als of reference marked thereon, which form a part of this specification.

The objects of this invention are to secure a wrench of increased convenience and one easily convertible for difierent services, to reduce the cost of construction, and to secure other advantages and results some of which may be more fully referred to hereinafter in connection with the description of the working parts.

The invention consists in the improved interchangeable wrench and in the arrangements and combinations of parts of the same, all substantially as will be hereinafter set forth, and finally embraced in the clauses of the claim. Referring to the accompanying drawings, in

which like numerals of reference indicate corresponding parts in each of theseveral figures, Figurelisasideelevation ofawrenchofmyimproved structure adapted for service as a pipewrench. Fig. 2 is a front elevation of the same. Fig. 3 shows it adapted for service as a monkey-wrench. Fig. 4 is a plan in detail of one of the jaws of the wrench,.andFig. 5 is a section on line as.

In said drawings, 6 indicates a socketed handle of the wrench. 7 is the removable shank thereof, having at its end opposite the handle a fixed jaw 8, and 9 is a sliding jaw which is both slidable or movable on the shank when not set by a set-screw or the like and removable from the shank when the handle has been previously removed, and thus interchangeable with another jaw of a different variety, at least two of such jaws, difiering in detail, as hereinafter described, accompanying each wrench, one with a plain or approximately smooth biting or clamping surface 10, adapted to lie atright angles to the longer axis of the shank, and the other having a ratcheted or toothed biting-surface 100, slightly inclined to said longer axis, as indicated in Fig. 1. The shank is separably held in the socket of the handle by a spring-catch 11, (shown in Figs. 1 and 2,) the flat or leaf spring of which is provided on its inner side with a tooth or detent 12, which enters through a hole in the handle, a notch 13 in the shank thus holding said shank firmly in place.

The sliding and interchangeable jaws 9 are held by set-screws 14, which latter are opposed by serrated plates 15, fitted within the passage for the shank '7 and having their serrated surfaces engaging the shank, so as to preventslipping, the shank at 16 being correspondingly serrated or roughened to more perfectly insure against dislocation of the jaw Sunder pressure. The serrated plate is provided at opposite ends with small tongues 25, held in place by screws 26 or otherwise, which engage the body of the jaw to prevent longitudinal movement of the plate in either direction.

The fixed jaw 8 at its projecting end is provided with a boss or lug 17 and when the device is employed as a pipe-wrench I employ a separable toothed plate 18, adapted to lie up against the inner surface of the said fixed jaw 8, as shown in Fig. 1.' Said plate is perforated to fit and receive the shank 7 and is provided with a spring-catch 19, bent, as at 20, to engage and be held by the boss or lug 17 the parts being related, so that the plate 18 is easily and quickly fastened in operative relation to the toothed jaw 9.

To change the monkey-wrench into a pipewrench, I simply lift the spring 11, detach the shank from the handle, remove the jaw having the plain surface 10, and then slip first the plate 18 and then the jaw 9, having the toothed surface 100, into their respective places and fix the same by the means described. I then replace the handle and opcrate the tool in the ordinary manner.

Having thus described the invention, what I claim as new is- 1. The improved wrench, comprising a handle, a shank removable therefrom and having aQfixed jaw provided with a boss 17, at the extremity farthest removed from the shank, a movable jaw and a plate interposed between said jaws and at one end having a perforation to receive the shank and at the other end having a spring-catch extending from said plate into engagement with said boss.

2. The improved wrench, comprisingahandie, a shank removable therefrom, means for fixing said shank in said handle, a fixed jaw on said shank, a toothed plate havinga springcatch to engage said fixed jaw anda movable toothed jaw and means for fixingit upon the shank, consisting of a set-screw and a serrated plate 15, inserted at one side of the shank perforation or passage of said jaw, and means for holding said plate in said perforation or passage, substantially as set forth.

3. The improved wrench comprising a handle, a shank having a serrated surface and a fixed jaw, a movable jaw having a passage or perforation for the shank and having a setscrew and a serrated plate fitting one side of said passage and having at its opposite ends tongues for preventing the lengthwise movement of said plate in said passage in either direction, substantially as set forth.

4. The improved wrench," comprising a handle, a shank removably fixed in said handle, a spring-catch adapted to detain the handle on the shank, a toothed, separable jaw having a set-screw, a toothed plate having a spring-catch and a jaw having a boss at its extremity over which the spring is adapted to ride and be caught to hold said plate against the last-mentioned jaw, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 16th day of April, 1903.

OLIVER E. OOVAR.

Witnesses:

CHARLES H. PELL, (J. B. PITNEY.

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