US296877A - Wrench - Google Patents

Description

(Nb Model.)

B. R 0 S S.

, WRENOH.

No. 296,877. Patented Apr. 15, 1884.

I WITNESSES %MM7 l/wmmfi W 6 Wmmeys UNITED STATES PATENT which.

BAR'NEY ROSS, OF STERLING; OHIO.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 296,877, dated April 15, 1884.

Application filed December 26, 1883. (No model.)

wrenches commonly known as monkey or hammer wrenches; and it consists in certain features of construction and in combination of parts hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view in perspective of my improved wrench. Fig. 2 is alongitudinal section of the movable jaw and attachments, and of a portion of the shank. Fig. 3 is a longitudinal section of a rack plate, showing the ribs by which the plate is attached, and before they are bent to secure them to the adjacent bands. Figs. 4 and 5 are views in perspective in detail, the former of a worm and thumb-lever, and the latter of a wedge thatis operated inside of the movable jaw by the worm. Fig. 6 is an elevaflat side of which rests upon the said shank. Theupperwall of the said chamber is sloping,

to correspond with the incline of the wedge, as shown in Fig. 2. The rear wall of the jaw 13 has a hole, I), and a slot, 12', severing the wall from the hole to the chamber, as shown in Fig. 6. The back part of the jaw Bis cut away, so that only two bands, 0 and d, extend around the shank A on the back side. To these bands is attached the rack-piece D, the teeth of which correspond with teeth on the back of the shank A, so that the two racks fit each other, The inner edges of the bands 0 and (Z- are beveled, as shown, while the ribs on the plate Dnext the ends of the plate are perpendicular to the plate, and are of such distance apart as to fit in between the said bands, as shown in Fig. 3. These ribs are swaged or bent over onto the beveled edges of the bands, 5 as shown in Fig. 2, holding the parts firmly together. The wedge G at the heel is cut away on top and recessed longitudinally, and provided in the walls of the recess with a worm-groove, c, that, when the parts are in position, engages the worm G, that has a shank extending through the hole I), and provided at the rear and on the outside of the jaw with the thumb-lever 9. When this thumb lever is turned to one side, the wedge O, by means of the said worm and groove, is drawn back, leaving the jaw loose on the shank A, on which it may be slid along to any desired point. By turning the thumb-lever in the opposite direction the wedge G is advanced, forcing the front part of the jawaway from the shank A, and bringing the two racks a and D together, thereby securing the j aw in its position on the shank.

In assembling the parts, the worm is insert- 7 5 ed, with the thumb-lever to the rear, into the chamber of the movable jaw, and is turned in 'such position that the narrow portion of the handle of the thumb-lever will pass backward through the slot b, connected with the hole b. The wedge is next placed in position with its worm-groove engaging the said worm. Next thethumb-lever isturned to the side that draws back the wedge, and the jaw Bis slid onto the shank A. The handle a is'next added and secured by the socket-nut a, and the device is completed.

In operating the device, theback end of the worm forms a shoulder that butts against the rear wall ofthe movable jaw and sustains the forward thrust of the worm, while the thumb lever, pressing against the outside of thejaw, holds the worm endwise while withdrawing the wedge.

What I claim isr 1. A wedge operating in a chamber in the movable jaw of a wrench, and provided with a longitudinal recess and a transverse wormgroove, in combination with a worm adapted to engage the groove and actuate the wedge, :00

and provided witha shank extending through 1 piece D, provided with ribs or projections the rear end wall of the movable jaw, and a l swaged or bent so as to engage the said bevthulnb-lever for operating the same, snbstaneled edges and hold the parts firmly in posi- 15 tially as set forth. tion, substantially as set forth.

2. The combination, with the Worm G, pro- In testimony whereof I sign this speeifica- I vided with theshank and thumb-lever, as tion, in the presenceof twowitnesses, this 11th aforesaid, of thejaw B, provided with the hole day of December, 1883.

b and the accompanying slot, by means of which the parts may be assembled, substan- BARNEY s Witnesses:

tially as set forth.

3. The bands 0 and d, provided each with ALBERT E. LYNCH, beveled edges, in combination with the rack- I G. H. DORER.

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