US1784123A - Wrench - Google Patents

Description

Dec. 9, 1930. Q Q A. G. WERNER WRE H Filed Nov. 4, 1929 im k Patented Dec. 9, 1930 f UNITED STATES mms'r A. e. WERNER, or nnoo'xmm, new roan WRENCH Application filed November 4, 1929. Serial No. 404,662.-

T his invention relates to wrenches which may be used for square, round, hexagonal or even irregular ob ects, and particularly to that class of wrenches in which a shiftable '6' jaw may be directly moved along the wrench shank to or from the fixed jaw thereof to desired position where the shiftable jaw will be immediately and automatically retainedin position.

The main object of my invention is to provide a wrench with a movable aw which may be directly moved to a proper position on the shank of said wrench with respect to the fixed jaw thereof without the necessity of slowly screwing up or down the movable jaw.

Another object is to provide a wrench of the character indicated which is very simple in construction and readily assembled. A further object is to have a wrench which preferably consists of only two parts and therefore can not easily get out of order.

Other objects and advantages of my invention will appear more fully hereinafter as this specification proceeds.

In the accompanying drawing forming part hereof Fig. 1 is a View ofa wrench made according to the principal features of my invention.

Fig. 2 is a similar view in which it is indicated how the shiftable jaw is released so as to be slidably adjustable toward or away from the rigid jaw of the wrench.

Fig. 3 is another view of the wrench when in use to grip a work piece, the shiftable jaw being shown in section to clearly reveal the construction and relative positions of parts.

Fig. 4 is a top view'of the wrench of Fig. 3.

Throughoutthe views the same reference characters indicate the same parts.

In the conventional types of wrenches, it is often slow work to screw the movable jaws thereof to a desired position, and this may be still further troublesome if any damage has been done the screw or nut by which the adjustment is to be performed, or to the teeth engaged thereby. The adjustment screw or nut is a relatively small part and rather easily damaged at times.

However, in the practice of my invention in which adjustment screws or nuts are dispensed with,.a handle 1 is provided with a shank 11 which terminates in a rigid jaw 3, and is provided intermediate the ends with a row of one vway teeth 2. A movable jaw 5 is arranged to co-operate with jaw 3 by being formed upon a jaw frame 7 and slidably mounted upon the shank 11 by means of a pair'of yokes 8 and 9; The yoke 8 is continued upward from jaw 5 about the wrench shank 11,'while yoke 9 is attached tothe rear end of jaw frame7 and also envelops the shank ll. These yokes may be individually riveted'or welded to the jaw or jaw frame, respectively, or the same may be drop forged or cast unitary therewith.

The jaws 3 and 5 are furnished with gripping teeth4 and 6, respectively so that the jaws may eflectively grip a round or other work-piece such as shown at 14:. Yokes 8 and 9 do not fit tightly-over the shank 11, but

are somewhat elongated upwardly in order to allow the jaw 5 to hang downby gravity as shown in the first two views, the yoke 8 being relativelythe longer. Within yoke 9, a spring 12 is secured in order to normally raise the yoke 9 and rear end of aw frame 7 for the purpose of holding a group of teeth 15 upon the jaw frame 7 in initial engagement with the teeth 2 of the shank 11. \Vhen it is desired to shift jaw 5' forward toward jaw 3, it is but necessary to push the same with judicious pressure upon yoke 9, as the teeth 15 will more or less readily disengage from and slide past teeth 2 in one direction, due to their form. But when it is desired to shift the jaw 5 away from jaw 3, a finger 13 may be definitely pressed down on yoke 9 in order to depress spring 12', when teeth 15 will be entirely disengaged from the shank teeth 2 and the jaw slid along the shank 11 to c any desired position. In any case, the release of yoke 9 and. spring 12 will immediately raise the yoke and jaw frame so that teeth' 15 will again initially engage shank teeth 2.

The yoke S is lengthened upwards to form an appreciable space 16 above the shank 11, while the yoke 9 is sufliciently extended in similar manner to provide a space 17 abovesaid shank so that when the latter yoke is depressed, the teeth 2 and 15 will clear, as already described. Of course, the size of space 16 determines how far down jaw 5 will normally hang when not in use. WVhen it is desired to use the wrench, say upon a round bar such as 14, the jaws may be opened a distance in the manner mentioned and the wrench placed in position in Well known fashion. If the jaw 5 is too far removed from the bar, it may be pushed up against the bar toward the rigid .jaw .as .also'has been described, and if the handle 1 is drawn down to partly rotate the wrench as a whole clockwise about rod 1%, the jaw 5 will be raised so jaw frame 7 lies against shank 11 as in Fig. 3 when the jaws will both grip the bar 14 and permit turning and manipulating it by means of the wrench. When the wrench is to be released from the bar, it need merely be drawn up in counter clockwise direction, and it can be immediately lifted off because j aw 5 will drop away from shank 11 out of register with rigid jaw 3.

Having now fully described by invention, I claim:

In a wrench having .a. wrench shank terminatin at one end in a handle and at the other end in a rigid jaw, the combination with a plurality of teeth upon said shank intermediate the ends thereof and ashiftable jaw haying a aw frame, a yoke upon said shiftable jaw enveloping said shank loosely so that said jaw may normally hang down out of contact with said shank, asecond yoke spaced from said first yoke upon said jaw frame and also loosely engaging said shank, one or more teeth secured upon said frame for engaging said shank teeth and an eccentric spring associated with said second yoke and arranged to project rearwardly from said second yoke toward the handle of the wrench so asto provide solely an eccentric lift and. forward urge to said second yoke and thereby to said shiftable jaw.

Signed at New York.

ERNST A. G. lVERNER.

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