US434912A - Henry bornstein - Google Patents

Description

(No Model.)

H. BORNSTEIN.

WRENCH.

No. 434,912. Patented Aug. 26, 1890.`

i UNITED STATES PATENT OEEICE.

HENRY BORNSTEIN, OF BOSTON, MASSACHUSETTS,ASSIGNOR OF ONE-HALF TO CHARLES GREEN, OF SAME PLACE.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 434,912, dated August 26, 1890.

Application filed June 17, 1890. Serial No. 355,728. (No model.)-

T all whom t may concern.-

Be it knownthat I, HENRY BoENsrEIN, of Boston, in the county of S11ffolk,State of Massachusetts, have invented certain new and useful Improvements in XVrenches, of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is an elevation of my improved wrench; Fig. 2,a sectional elevation showing the check-nut turned away from the jaw, and Fig. 3 is a vertical transverse section taken through the check-nut.

Like letters of referenceindicate corresponding parts in the different figures of the drawings.

My invention relates especially to that class of wrenches known as monkey-wrenches,

, and it consists in certain novel features hereinafter fully set forth and claimed,the object .being to produce a simpler, cheaper, and more effective device of this character than is now in ordinary use.

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation.

In the drawings, A represents the handle of the wrench, and B the body, on one end of which said handle is mounted. The body is exteriorly screw-threaded, andis interiorly tapped and screw-threaded. The movable jaw O is hollow, and is interiorly threaded to receive the body B. The fixed jaw D has a stem b, rectangular in orosssection, which is tted to slide in the corresponding mortise in the jaw C. Two sides of the jaw C are open at CZ, and a stop f projectsinto said openings. The inner end of the stem ZJ is reduced at g, and has its edges screw-threaded at h to work in the interior threads of the body B. A check-nut II is mounted on the body B in position to be turned into engagement with the lower end of the movable jaw U. Said nut is provided with a curved groove or chamber m in its upper edge, and a pin or 5o boss t formed on the lower end of said jaw C projects into said chamber.

In the use of my improvement, by turning the handle A from left to right, as viewed in Fig. l, and holding the jaw C stationary, the jaw D is forced rapidly out from the jaw O, the threaded body B at the same time advancing into said jaw C, this movement quickly opening` the wrench-jaws. lVhen adj usted at the proper distance to receive the nut, the check-nut I-I may be quickly turned up against the j aw C, preventing it from accidentally turning on the body B. By means of the pin t projecting into the chamber in said nut, said nut is prevented from being turned away from the jaw sufficiently to interfere with the movement of the body B therethrough. The nut is, moreover, held by said pin so that it may be quickly turned against the jaw when it is desired to secure the same. This enables the wrench when employed continuously upon work of the same size to be readilyhandled without repeatedly adjusting the jaws, as is necessary in wrenches of ordinary construction.

Having thus explained my invention,what I claim is 1. In a wrench, an interiorly and exteriorly screw-threaded body provided with a handle, in combination with a movable jaw interiorly threaded to receive said handle and sliding on the stem of the fixed jaw, a portion of said stem being reduced and threaded to work in said body, a check-nut on said body provided with a groove or chamber, and a pin on said movable jaw projecting into said chamber, substantially as described.

2. In a wrench, an interiorly and exterior-ly scre .v-threaded body provided with a handle, in combination with a fixed jaw having a rectangular stem, the inner end of said stem being reduced and screw-threaded on opposite edges to work in said body, a movable jaw fitted to slide on the rectangular portion of said stem and interiorly screw-threaded to receive said body, a stop on said stem, a check-nut on said body, and a pin on said movable jaw projecting into a curved groove or chamber in said nut, all being combined to receive said body, the nut H on said body, 1o and arranged to operate substantially as set provided with the chamber on, and the pin ,t forth. on said movable jaw projecting into said 3. Inawrenoh,tl1einteriorlyzmdexteriorly chamber, substantially as and for the pur- 5 screw-threaded body B, provided with the pose set fort-h.

handle A, in combination with the jaw B, hav- HENRY BORNSTEIN. ing the stem b reduced and screw-threaded lVitnesses:

at g, the 'stop f on said stem, the jaw C, slid- O. M. SHAW,

ing on said stem andinteriorlyscrew-threaded REUBEN SIMMONS.

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