US1693347A - Adjustable wrench - Google Patents

Description

Nov. 27, 1928- 1,693,347 A. s. PlNKUS ADJUSTABLE WRENCH Filed March 1927 INVENTOR. J I EfidIYUS- BZWI ZJS,

ATTORNEY.

Patented Nov. 27, 1928.

UNITED STATES ABRAHAM S. PINKUS, OF NEW YORK, N. Y.

ADJUSTABLE WRENCH.

Application filed March 7, 1927. Serial No. 173,516.

This invention relates to adjustable wrenches and has for an object to provide wrenches of this character which are automatic in operation, which are simple to construct and easy to operate. The invention more particularly resides in the construction of a novel type of handle, in the sliding engagement of the jaws and inthe construction of the slot by which the jaws are adjustable.

These objects will be more fully understood from the following specification and the accompanying drawings in which, Fig. 1 is a general view of a wrench constructed according to my invention, Fig. 2 is a cross-section of the handle on line 2-2 in Fig. 1; Fig. 3 is a side view of the socalled fixed jaw of the wrench and Fig. i is a correspondingend view. jaw and Fig. 6 is an end View of the sliding jaw. Fig. 7 shows a method of forming the jaw from a single forging and Fig. 8 is an assembly of Fig. 7.

The present invention is applied to wrenches constructed on the toggle principle. That is, the jaws are constructed to slide upon each other and are pivoted by a toggle action to the handle where a preliminary movement of the handle brings the jaws together to bear upon the nut which is thereafter turned by the wrench handle, and a movement of the handle in the opposite direction releases the aws so that the operation of the wrench is the equivalent of, a ratchet action. This principle is understood to be old and well established in the art of wrench manufacture.

The handle of this wrench is formed from a pair of plates the edges of which are formed in a semicircle and the centre depressed so that when these plates are brought together and welded along their edges, they form a cylindrical edge with a depressed interior section and the end is rounded with the opposite end formed into a jaw to engage the wrench head, This makes a light, strong and smooth handle which is easy to grip, does not require knurling and the rounded edges prevents it from engaging other objects as the wrench is operated.

The fixed aw is preferably made from two forgings which are shaped under a drop hammer to include the slot for the sliding jaw when these forgings are welded on their abutting faces, also an arcuate slot through which the sliding aw is pivoted to the handle.

The sliding jaw is provided with a comparatively deep tongue to engage the slot in Fig. 5 is a side view of the sliding the fixed aw. A transverse slot is provided in this tongue to engage the pivot of the handle. This tongue is also undercut on its central lower-edge to clear the pivot of the fixed jaw and to limit the movement of the aw.

Referring to the drawings, 11 is the handle, 12 is the fixed jaw which is pivoted to the jaw of the handle 14 by pivot 15, and 13 is the sliding jaw which is pivoted to the jaw of the handle by pivot 16. The handle as shown in section in Fig. 2 comprises a pair of plates 11 the edges of which are semi-cylindrical as indicated at 17 and 18 while the centre is depressed. These plates are welded along their abutting edges making a handle with rounded edges and a rounded end as shown in Fig. 1. These plates are also formed into the disc shaped ends 14 which form a pair of jaws to which the wrench head pivotally connected.

The aw in Fig. 3 is referred to as the fixed jaw because the other aw slides thereon but it should be noted that this jaw is pivoted in the jaws of the handle 14 by the pivot 15 a through the pivot hole 22. This jaw is also preferably depressed at 21 011 each side to receive the discs 14 of the handle jaw. The arcuate slot 23 is formed in the sides of this jaw to permit pivot 16 to move freely therein as the 12 moves on pivot 15.

The sliding jaw 13 is provided with a tongue 26 which slides in the slot 25 of jaw 12. This tongue is provided with a central transverse slot 27 which is engaged by the pivot 16 of the handle 11 and through which the toggle action is obtained for the movement of the jaws of the wrench. It will be noted for instance, if jaw 12 is stationary and the handle moved to the right, jaw 13 will he slid towards 12 and a movement of the handle in the opposite direction will reverse this action.

It will be noted from the dotted outline of the relation of the jaw 12 to jaw 13 in Fig. 5, that the ends a and b of the tongue 26 project below the pivot 24, which is the body of the pivot 15. This is also shown in Fig. 4. The free movement of jaw 13 requires that its lower edge be undercut as at 28 to clear 24. It is apparent that the pivot 24, when in place, acts as a stop to limit the movement of the sliding jaw in the slot 25. r

The fixed aw may be made from a pair of forgings as indicated in Fig. 4 and which are welded on their abutting faces on the line h9 ees; Wher awle isfar grooved as inflieated at 31'so thatth'eiooiners an accurate bearing for the tongue 26; Another method of foflfii-ngFthe-ffiXed. jaw is shown in Figs. 7 and 8. The ja y lg is formed from one forging split andspread apart as shown in the wings 35 and haying the end projections 36 on the opposite side.

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