US1178287A - Wrench. - Google Patents

Description

N. ANDERSON.

WRENCH.

APPUICATION FILED JULY 12, 1915.

Patented Apr. 4,

MINI lll li mmmq THE COLUMBIA PLANOORAPH cu.. WASHINGTON, n. c.

T T F11? NELS ANDERSON, OF HURLEY, SOUTH DAKOTA.

WRENCH.

Specification of Letters Patent.

Patented Apr. 4:, 1916.

Application filed July 12, 1915. Serial No. 39,516.

ing certain novel features whereby the relative positions of the jaws and handle may be readily altered to facilitate application of the wrench in close quarters.

A further object of the invention is the production of a self-adjusting wrench which is stable and thoroughly dependable in operation, and the cost of production of whlch is reduced to the minimum.

l/Vith these and other objects in view,

the invention, consisting in the construction,

combination and novel arrangement of parts, will be clearly understood from the following description, reference belng had to the accompanying drawings, which form a part of this application and in which like characters of reference indicate corresponding parts throughout the several views, of which,

Figure 1 is a side elevation of a wrench constructed in accordance with the inven tion; Fig. 2 is a vertical section of the same, a portion being cut away; Fig. 3 s anelevation opposite to Fig. 1; Fig. 4 1s a plan of Fig. 3; Fig. 5 is an inverted plan of the jaws as presented in Figs. 2 and 3; Fig. 6 is a fragmentary side elevation of a modlfication of the jaws; Fig. 7 is a rear elevation of the sliding jaw; and Figs. 8 and 9 are enlarged elevations of the pivot-bolts.

Although I have illustrated and hereinafter described the. preferred embodiment of the invention, I would not be understood as being limited to the specific structure chosen for illustration, for various alterations and modifications in the details of construction and arrangement of parts may be made without departing from the spirit and scope of the invention as defined in the appended claims.

The invention contemplates, broadly, a

wrench including companion jaws, movable toward and from each other and provided with toothed portions. A spur-gear, or toothed-sector, is journaled upon one jaw and engaged with the toothed portion of the other jaw and the handle is pivoted to an eccentric portion of the sector and provided with teeth engaged with the toothed portion of the jaw upon which the sector is journaled, all-of which will presently be made more clear.

In its preferred form, the wrench includes means for readily disengaging the toothed portions from the members with which they coact, to permit alteration of the normal mutual relation of the jaws, and the normal position of the handle.

Referring, now, to the illustrations, 10 is the handle, the forward end of which is bifurcated and formed with segmental pinions, 11, engaged with similar pinions, 12, formed on the bifurcated portion of a suitable head, 13, provided with a jaw, 1d, at right-angles to which the head is formed with a straight face, 15. The straight-faced portion of the head is provided with a channel, or slot, 16, the inner portion of which is enlarged to form a guide-way, 17, which may extend entirely through the head and the intermediate portion of which communicates with the opening intermediate the toothed-segments, 12. lVithin the guideway, 17, the head slidably incloses a suitable rack, 18, having a web, or reduced portion, 19, freely inclosed within the channel, 16, and carryinga jaw, 20, in parallelism with the companion jaw. The rack may be formed with a groove, 21, into which extends a stud, or pin, 22, in the head, and

engageable with the portion of the rack at the end of the groove to prevent outward displacement of the rack. The bifurcated portion of the head incloses a spur-gear, or sector, 23, engaged with the rack and having an extended portion, 24, pivoted between and coaxially with the pinions, 11, upon a suitable pin, or bolt, 25. The sector, 23, is provided with an eccentric circular opening, 26, inclosing a disk, 27, fixed upon a bolt, or pin, 28, protruding coaxially and freely through the segments, 12, and positioned eccentric to the disk and coaxially with the sector, 23. The pivot-bolts, 25 and 28, are interconnected on one side of the wrench by a suitable latch-plate, 29, one end of which is fixed to the bolt, 28, and the opposite end of which is provided with an opening to inclose the bolt, 25. The latter end may also be formed with an outwardlybent car, 30, by which the latch-plate can be conveniently sprung out of engagement with the adjacent bolt to permit the adjustment of the toothed members, which operation will be hereinafter described. On the opposite side of the wrench, the pinions, 11 and 12, may be covered by a guard-plate, 31, secured at one end to one ofthe bolts and formed at the other end with a slot, 32, to slidably inclose the other bolt and permit relative movement of the bolts toward and from each other.

.In the embodiment chosen for illustration, the portion of the shank of the bolt, 28, upon which the guard-plate and adjacent pinion are mounted, is cylindrical, as at 33, (Fig. 8), while the remaining portion is flat-sided, as-at 34, to coact with correspondinglyshaped openings, 35, in the eccentric, 27, and latch-plate, 29, whereby relative rotation between the bolt and the eccentric and latch-plate is prevented. The corners of the fiat-sided portion of the bolt are rounded, however, as at 36, to provide a suitablejournal for the pinion 12, adjacent the latch plate. Assuming, now, that the head of the wrench is fixed, movement of the handle toward and from the position indicated in broken lines, in Fig. 1, causes the sector, 23 to coact with the rack to accordingly move the jaw, 14, toward and from the position indicated in broken lines.

It is now apparent that the wrench may be readily applied to and firmly gripped upon a nut, bolt-head, or other member; and that the firmness of the grip increases according as the pressure upon the handle. Should it be desired to alter the angle of the handle, with respect to the head; or to change the normal mutual relation of the jaws, the latch-plate is first disengaged from the bolt, 25, and then turned laterally, thus turning the eccentric within the sector,

' whereupon the latter will be disengaged from the rack, and the pinions, l1 and 12, separated. The jaw, 14, may then be moved closer to or farther from its companion; or the handle may be moved laterally to change its angle. Upon the latch-plates movement to its normal position, the toothed members Having thus described my inventiomwhat I claim as new and desire to secure by Letters Patent of the United States, is,-

1. A wrench comprising companion jaws, each movable toward and from the other and having toothed parts, a toothed sector pivoted at its center upon one of said jaws and engagedwith the toothed part of the other jaw, and a handle having a toothed part and pivoted to an eccentric part of the sector, the toothed part of the handle being engaged with the toothed part of the jaw upon which the sector is pivoted.

2. A wrenchcomprising companion jaws, each movable toward and from the other and having toothed parts, a toothed sector pivoted at its center upon one of said jaws and engaged with the toothed part of the other jaw, a handle pivoted to an eccentric part of the sector and having a toothedpart engaged with the toothed part of the jaw;upon which the sector is pivoted, and means for, disengaging and re'c'ngaging the sector. and toothed part of the handle from and'with the parts with which they respectively: .coact.; 3. A wrench comprising a head. having a toward and from said first jaw and having a rack slidably carried by the head, a toothed sector j ournaled for rotary movement coaxially with the segmentand engaged with the rack, and a handle pivotedupon an eccentric part of the sector and having'a toothed segment engaged withsaidfirstsegment.s u-

the segment, a handle having a toothed segment pivoted upon the sector and engaged with said first segment, means :for preventing relative movement between the eccentric disk and sector, and means for turningthe eccentric within the sector.

5. A wrench comprising. a head having a jaw and a toothed segment, a! second j aw movable toward and from said firstjaw and having a rack slidably carried by the head, a toothed sector engaged with the rack and having an extended part and an eccentric' opening, said'opening beingeccentric tothe axis of the'segment, an eccentric-disk' inclosed within said opening, a pivot-bolt ex tending freely and coaxially through the segment, said disk being secured to thelbolt,

a handle having a toothed segmentpivoted to said part and engaged with said first segment, and a link secured to said bolt and detachably pivoted coaxially with saidsecond segment. x

6. A wrench comprising a'head having a jaw on itsforward edge, a straight-faced V v 9o. jaw and a toothed segment, a aw movable channeled portion disposed at right-angles to the jaw and having its rear edge provided with companion toothed segments, a rack slidably inclosed within the channeled portion and provided with a jaw disposed in parallelism with said first jaw, a toothed sector engaged with the rack, disposed intermediate said segments and provided with an opening eccentric to its axis and the axis of the segments, an eccentric-disk inclosed within said opening, a pivot-bolt extending coaxially with and freely through said segments, said eccentric-disk being secured to said bolt, a handle having a bifurcated part provided with companion toothed segments engaged with said first segments, said sector having an extended part inclosed by said bifurcated part, a pivot-bolt extending coaxially with and through said second segments and said extended part, and a latch-plate secured to said first bolt and detachablysecured to said second bolt.

In testimony whereof I have hereunto set my hand.

NELS ANDERSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patent-a. Washington, D. 0.

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