US1152832A - Wrench. - Google Patents

Description

D. W. NULL.

WRENCH.

APPLICATION FILED MAY'3, 1915.

1,152,832. Patented Sept. 7, 1915.

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COLUMBIA PLANUGRAPH c0., WASHINGTON. n. c.

DAVID WALTER NULL, OF NED, PENNSYLVANIA.

WRENCH.

Specification of Letters Patent.

Patented Sept. 7,1915.

Application filed May 3, 1915. Serial No. 25,405.

To all whom it may concern:

Be it known that I, DAVID W. NULL, a citizen of the United States of America, and resident of Ned, county of Greene, and State of Pennsylvania, have invented certain new and useful Improvements in Trenches, of which the following is a specification.

This invention relates broadly to wrenches of the quickly adjustable type, and specifically to novel and improved wrench of said type.

The object of the invention is to provide a wrench of that class having a toothed handle or shank and a rotatable worm associated with a movable jaw whereby adjustment of the latter is effected, said wrench having means whereby said worm may be bodily dissociated from said shank to permit of a rapid shifting movement of said jaw.

The invention resides in the features of construction, arrangement of parts and combinations of elements which will hereinafter be fully described, reference being had to the accompanying drawings, forming a part of this specification, in which Figure 1 is a side elevation of the invention; Fig. 2 is a longitudinal sectional view; and Fig. 3 is a cross section on the line 33,

Fig. 1.

Referring to said drawings, in which like designating characters distinguish like parts throughout the several views1 indicates a wrench handle or shank having a fixed jaw 2 and provided with teeth 3 along one edge thereof, said parts being of a common construction. Mounted to cooperate with the fixed jaw 2 is a movable jaw 41 having an integral sleeve portion 5 loosely embracing and slidable upon the shank 1. An extension 5 is formed by extending the sleeve rearward a considerable distance from the jaw 41, said extension embracing said shank except along a portion of the edge on which the teeth are located. Provided in the outer face of each of the opposite side portions of said extension are two parallel transverse grooves 7 in which are mounted the parallel arm 8 of a yoke 9, said arms being located to constitute two oppositely disposed pairs. The back portion of said yoke rests upon a yieldable element, as a spring 10 of bowed form which has one end rigidly attached to the sleeve. Fitted between the extremities of the arms 8 constituting each pair is a bearing piece 11, said bearing pieces being secured to said arms by transversely directed pins or rivets 12. Mounted in said bearing pieces are the opposite ends of a spindle 13 upon which, between said bearing pieces, a worm 14 is rotatably mounted.

The spring 10 normally maintains the yoke 9 in a position wherein the threads of the worm are disposed in operative relation to the teeth of the shank, so that by rotation of said worm the movable jaw 4: may be adjusted with respect to the fixed aw 2. How

ever, by the application of pressure to the back portion of the yoke, as with the thumb of the hand which holds the shank, said yoke is forced downward, the arms 8 sliding in the grooves 7, and the threads of the worm are thus disengaged from the teeth, whereupon said movable jaw may be freely moved forward or back to the desired point of adjustment. The sleeve extension 5 has a rear end shank-encircling portion 5" against which the rearmost bearing piece 11 abuts, as shown in Fig. 2, and said portion 5 is provided'with an open slot 15 in its lower end, said slot permitting free vertical move ment of the rearwardly-extending end of the spindle 13. When the applied yoke-depressing pressure is removed from the back portion of the yoke, the spring 10 actuates the latter to resume its normal position, returning the worm to a position in operative relation to the teeth of the shank.

lVhat is claimed is 1. In a wrench, a shank having a fixed jaw and teeth, a movable jaw on the shank, a sleeve connected to the movable jaw and extending beyond the latter and having an opening in register with the teeth, said sleeve having a pair of spaced transverse grooves on each side thereof and extending thereacross, a yoke having a pair of parallel arms at each end thereof which arms are received in'the respective grooves, a pair of bearings connected to the free ends of the arms, one of said bearings being disposed adjacent the inner end of the movable jaw, a shank encircling member on the inner end of the sleeve against which the other bearing abuts. a worm carrying spindle journaled in said bearings, said member being slotted and said shank extending beyond its inner bearing and into said slot, and a spring on the sleeve and bearing against the yoke.

2. In a wrench, a shank having a fixed jaw and teeth, a movable jaw on the shank, a sleeve connected to the movable jaw and extending beyond the latter and having an opening in register with the teeth, said sleeve having a pair of spaced transverse grooves on each side thereof and extending thereacross, a yoke having a pair of parallel arms at each end thereof which arms are received in the respective grooves, a pair of bearings received in the space between the free ends of the arms of the respective pairs thereof, pins extending transversely through the arms and bearings, one of said bearings being disposed adjacent the inner end of the movable jaw, a shank encircling member on the inner end of the sleeve against which the other bearing abuts, a worm carrying spindle journaled in said bearings, said member being slotted and said shank extending be yond its inner bearing and into said slot, and a spring on the sleeve and bearing against the yoke.

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

DAVID WALTER NULL. W'Vitnesses:

D. L. HAUGHT, J 0s. H. SACHER.

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

Washington, D. C.

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