US634216A

US634216A - Wrench.

Info

Publication number: US634216A
Application number: US67045098A
Authority: US
Inventors: William H Robinson
Original assignee: J A KRAMER
Current assignee: J A KRAMER
Priority date: 1898-02-15
Filing date: 1898-02-15
Publication date: 1899-10-03
Anticipated expiration: 1916-10-03

Description

No. 634,2!6. Patented Oct. 3, I899;

w. H. ROBINSON.

(Application Feb. 15, 1898.)

(No Model.)

rrnn STATES WILLIAM H. ROBINSON, OF MARION, IOWA, ASSIGNOR OF ONE-HALF TO J.- A. KRAMER, OF SAME PLACE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 634,216, dated October 3, 1899. Application filed February 16, 1898. Serial No. 670,450. iNo model.)

To all whom it may concern:

Be it known that I, WILLIAM H. ROBINSON, a citizen of the United States, residing at Marion, in the county of Linn and State of Iowa, have invented certain new and useful Improvements in Wrenches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The object of this invention is to produce a monkey-wrench for pipes or nuts capable of very quick and close adjustment to varying kinds of work, the construction being simple, strong, and comparatively inexpensive.

The invention will be fully hereinafter described and claimed, reference being had to the accompanying drawings, forming a part of this specification, in which Figure 1 is a view in perspective of a wrench embodying my invention. Fig. 2 isa central longitudinal section of the same, but with smooth instead of serrated jaws. Fig. 3 is a side view of the dogs which hold the sliding jaw and of the stirrup for disengaging them. Fig. 4: is a transverse section in the line w :0 of Fig. 2 and as seen from the left of said line.

Similar letters of reference indicate corresponding parts.

The body of the wrench does not differ materially from others in common use, consisting of a head A, serrated shank A, and handle A On the shank is mounted the sliding jaw, which embodies the principal feature of this invention.

Bis a rectangular slide fitting the correspondingly-shaped shank A and adapted to slide freely thereon. This terminates at one end in a jaw 13. Theinner face of this jaw is preferably at an angle to the adjacent face of the other jaw, and to it is fitted, as by a sliding T-shaped connection, a correspondingly-angled plate B The face of this plate, as well as the outer jaw, may be serrated, as in Fig. 1, and for use as a pipe-wrench this construction 'is necessary; but the sliding plate serves a useful purpose as an adjunct to a nut-wrench, as will hereinafter appear, and both it and the outer jaw may in such case be plane, as shown in Fig. 2. At its lower end--it should be notched to straddle the shank as it moves down, the lower ends of the plate normally extending as low or a little lower than the upper face of the shank, so as to give a bearing at all times to anything the wrench may grasp and for the full length of the jaws, if necessary. The plate is forced outwardly to normal position by a suitable spring 0, which may be a part of the spring 0 governing the jaw-holding dogs hereinafter to be described. This terminal spring 0 passes through a slot B in the sliding jaw and at its inner end engages a stud B, which prevents the plate B from moving out farther than the normal position shown in Figs. 1 and 2.

In a suitable recess formed in the upper part of the slide B is placed a pair of dogs D and D, the teeth of which are adapted to engage the corresponding teeth formed on the adjacent side of the shank A. By reference to Fig. 3 it will be'seen that the teeth of these dogs are set dodging with respect to each other, so as to engage the shank-teeth alternately, and by this means it is possible to obtain a fairly-close adjustment of the sliding jaw and at the same time have teeth on the shank and dogs coarse enough to give the requisite strength. The dogs are held in engagement with the shank by springs C and G which preferably are united at the base 0, where the spring as a whole is attached to the jaw B by a screw E.

It will be seen that the construction is such that no pivot-pin isrequired for the dogs, the pivotal part D being retained between the spring 0 and a shoulder B formed in the slide B. This shoulder coincides with a corresponding shoulder D near this end of the dog, and the end thrust is thus taken by the end of the dog and not by a pivot-pin, with a great increase of strength as a result of such construction.

The dogs are disengaged from the shank by a lifter F, which is in the nature of a stirrup with inwardly turned extremities F. This stirrup passes through suitable holes in the slide, each side of the shank, from the back side of the wrench, the loop being always in a position to be conveniently reached by the thumb of the operator and serving also for the movement of the sliding jaw back and forth on the shank for adjustment. A shoulder 13 at this end of the slide coacting with a shoulder D near the end of the dogs prevents them from slipping out of their seat endwise.

In the operation of the wrench itis but necessary to slide the movable jaw up against the nut or pipe to beheld and permit the dogs to engage the shank. Then on turning the handle in the direction indicated by the arrow the inclined plate B is forced toward the shank, tightening the jaws effectually on the object held by them.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a wrench, the combination with ajaw having a shank and handle rigidly attached thereto, the shank being serrated on one side, of a sliding jaw mounted on said shank, a pair of dogs mounted in a recess in said sliding jaw, adjacent to the serrated side of the shank, with ends abutting on shoulders formed in said jaw-slide, springs adapted to hold said dogs in engagement alternately with said shank, and a lifter extending through the slide portion of the jaw from the opposite side and engaging the free ends of the dogs, the teeth of said dogs being alternate, substantially as and for the purpose set forth.

2. In a wrench, the combination with the fixed jaw and its serrated shank, of a sliding jaw movable on said shank, and having an angled plate fitted to slide on the angled face of the jaw to tighten the wrench on the work, serrated dogs mounted in a suitable recess in the slide portion of the jaw, a suitable lifter therefor adapted to be pressed by the thumb of the operator to disengage the' dogs, and springs to hold the dogs normally in engagement with the shank, and to force the inclined plate outwardly to normal position, substantially as described.

3. In a wrench, the combination with the fixed jaw and its serrated shank, of a sliding jaw movable on said shank, and having an inclined face adjacent to the fixed jaw, an inclined plate having an interlocking, sliding connection with said inclined jaw, a spring adapted to force it outwardly to normal position, a stop to limit its outward movement, a pair of alternately-engaging dogs coacting with the serrated shank, springs tohold them in engagement, and a lifter adapted to disengage them, substantially as described.

4. In a wrench, the combination with the fixed jaw and its serrated shank, of a sliding jaw movable thereon, and having an inclined face opposite the fixed jaw extending some distance below the face of the shank fronting said jaws, an inclined plate having an interlocking, sliding connection with said inclined jaw, and notched at its end adjacent to the shank, so as to straddle the same when forced downwardly, a spring to force it normally outwardly, a stop to limit its outward movement, and means substantially as described for retaining the sliding jaw in any desired position.

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

WILLIAM H. ROBINSON. Vitnesses:

J. A. KRAMER, J. F. GRoAT.