US1180301A - Monkey-wrench. - Google Patents

Description

A. KLEIN.

MONKEY WRENCH.

APPLICATION FILED IUNEH, 191s.

Patented Apr. 25, 1916.

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THE COLUMBIA FLANOGRAPH ,co., WASHINGTON, D c.

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ALBERT KLEIN, OF EMSWORTH, PENNSYLVANIA.

MONKEY-WRENCH.

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Application filed Tune 11, 1913.

To all whom it may concern:

Be it known that I, ALBERT KLEIN, a citizen of the United States, and a resident of Emsworth, in the county of Allegheny and State of Pennsylvania, have invented a new an d useful Improvement in MonkeylVrenches; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to wrenches and has special reference to such a class as are known as monkey wrenches, for hearing against flat surfaces to turn the same.

The object of my invention is to provide a cheap, simple and efficient form of monkey wrench which can be adjusted to any gage in a seconds time and when so adjusted will be firm and secure andwill not become loose until desired by the person using the same.

A further object is to provide a wrench having few parts in order to eliminate the labor of assembling and finishin the same.

My invention consists, general y stated, in the novel arrangement, construction, and combination of parts as hereinafter more specifically set forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains to construct and use my improved monkey wrench, I will describe the same more fully referring to the accompanying drawing in which Figure 1 is a side elevation of my improved wrench showing part of the same broken away. Fig. 2 is a similar view of the same showing the jaws closed and the locking piece in its open position. Fig. 3 is a top plan view of the wrench with part of the sliding jaw broken away. Fig. i is a top plan view of the sliding jaw showing the rack by which the same is locked. Fig. 5 is an end view of the locking piece em ployed. Fig. 6 is a top view of the spring used for engaging with the locking piece.

Like symbols of reference herein indicate like parts in each of the figures of the drawing.

As illustrated in the drawing my improved wrench has a body member 1 which is provided with a fixed jaw 2 at the one end of the same and a handle portion 3 at its other end. This body member 1 has a pair of walls 4 which extend up from the fixed jaw 2 a d are pro ided with countersunk rder t get the necessary distance between Specification of Letters Patent.

Patented Apr. 25, 1216.

Serial No. 772,992.

holes 5 at the upper end of the same for the purpose of receiving rivets 6, which rivets extend through holes '7 in a fixed pawl 8 which fits between the walls 4 of said body member. The pawl 8 has its lower face 9 curved as shown in Fig. 1 and such face terminates at its rear end in a tooth 10 as hereinafter described.

Immediately beyond the two walls 4t and at a lower level than the bottom of said walls are a pair of small flanges 11 which define a recess 12 wherein is disposed a locking dog 13. This locking dog 13 is adapted to be held in position in the recess 12 by means of a pin l l extending through the lower end of such locking dog and through holes 15 in each of the small flanges 11, while the free end of said dog is provided with a lateral operating arm or trunnion 16 at each side of the same as later explained. The locking dog 13 is further provided with a small shoulder 17 on the outer face of the same for engaging with a flat spring 18 secured to the handle portion 3 of said body member. This spring 18 has a curved end portion 19 for fitting against the shoulder 17 of the locking dog so that the tendency of such spring is to keep the said dog in an upright position such as shown in Fig. 1 of the drawing.

The sliding jaw 20 has a shank 21 which is slidable between the walls 1 of the body member 1 and is provided with a rack 22 upon its outer face for engaging with the tooth 10 on the pawl 8 as later described. The space included between the walls f is of suflicient height to permit the rear portion of the shank 21 to have its rack 22 disengaged from the tooth 10 on the under face of the pawl 8 while the other end of the same included between said walls will be held to a substantially firm position as shown in Figs. 1 and 2.

The use and operation of my improved monkey wrench are as follows :-The wrench is grasped by the handle portion 3 and the thumb pressed against one of the trunnions or operating arms 16 of the locking dog 13 so as to draw this member downward from its engagement with the bottom face of the shank 21 of the sliding jaw 20. This movement allows the tooth 10 on the under face of the pawl 8 to become disengaged from the rack 22 whereupon the said bar may be pushed to any desired position in the jaws 2 and 20 and when this'is done the thumb is removed from the member 16 and the spring 18 raises the locking dog 13 to its original position in order to again engage the tooth 10 with the desired tooth on'the rack 22 thereby locking the same and preventing any further movement of the sliding aw 20.

It will thus be seen that my improved wrench-will be quick operating and eiTective and as the parts may all be drop-forged, the machine work will be reduced to a minimum sothat the cost of the wrench will be considerably lower than the present cost ofless eflicient wrenches.

Various modifications and changes in the design and construction of my improved wrench may be resorted to without departing from the spirit of theinvention-or sacrificing any of its advantages.

What I claim as my invention and desire to secure by Letters Patent is 1. A wrench including a body member, a fixed jaw formed on the body member, a pawl carried by the fixed jaw, a movable jaw having its shank'disposed for sliding movement through the fixed-jaw and-provided with rack teeth engageable with the pawl, and a spring pressed locking dog pivotally mounted in the body member and a locking means formed on the dog, said means being normally held in locking engagement with the shank of the movable jaw for maintaining the shank in spaced relation to the body member and in looking engagement with the pawl, said locking means being supported upon the face of thebody member when in operative position.

2. Awrench of the character described including a body member,a fixed jaw car- Iied by thebody member, a movable jaw 'slidable through the fixed jaw, a fixed pawl adapted to engage with the movable jaw for maintaining the same in engagement with the pawl, and a lateral trunnion carried by the locking dog, said trunnion being engageable with the body member for limiting the swinging movement of the dog and constituting a finger grip by which the dog may be manipulated.

3. A wrench of the character described including a body member, a fixed jaw formed thereon, a pair of parallel spaced flanges formed on one longitudinal face of the body member, a movable jaw slidable with respect to the fixed jaw, a pawl carried by the fixed jaw and engageable with the shank of the movable jaw for maintaining the movable jaw in adjusted position, a locking dog pivotally mounted between the said fianges,a leaf spring engaging the dog for normally maintaining the dog in engagement with the shank of the movable aw for urging the same into locking engagement with the pawl, and lateral trunnions formed on the outer terminal of the locking dog, said trunnions constituting finger grips for manipulating the dog and being engageable with the longitudinal face of the body memher for limiting the movement of the dog in both active and inactive positions.

In testimony whereof, I, the said ALBERT KLEIN, have hereunto set my hand.

ALBERT KLEIN.

Witnesses:

T. B. HUMPHRIES,

J. N. CooKE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

' Washington, D. G."

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