US614993A - Island - Google Patents

Description

Patented Nov. 29, I898. D. A. SEAMANS.

W R E N C H (Applicatiun filed Apr. 14, 1898.)

(No Model.)

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DANIEL A. SEAMANS, OF CUMBERLAND, RIIODE ISLAND, ASSIGNOR OF ONE-HALF TO JOHN E. FOGARTY, OF SAME PLACE.

WRENCH;

SPECIFICATION forming part of Letters IPatent No. 614,993, dated November as, me. Application filed April 14, 1898. Serial No- 677,567. (No model.)

To aZZ whom it may concern.-

Be it known that I, DANIEL A. SEAMANS, of Cumberland, county of Providence, and State of Rhode Island, have invented certain new and useful Improvements in WVrenohes; and I do hereby declare the following specification, taken in connection with the accompanying drawings, forming a part of the same, to be a full, clear, and exact description thereof.

The object of the invention is to provide a wrench of simple construction and one in which the movable jaw may be quickly and conveniently adjusted to nuts or bolts of varying size and in which the movable jaw will be automatically locked and firmly held in its adjusted position. To these ends the invention consists in the features and combinations hereinafter described, and set forth in the claims.

In a wrench embodying the present improvements in the preferred form the movable jaw is held in position by a wedge-shaped block interposed between the bar of the wrench and said movable jaw and yieldingly held in engagement therewith by a spring. The edge of the bar engaged by the wedge is preferably provided with serrations which are engaged by corresponding serrations upon the wedge. When the movable jaw is moved toward the fixed jaw, the spring yields to allow the serrations on the wedge to ride over the serrations on the bar; but when it is attempted to move the jaw away from the stationary jaw the jaw acts to crowd the wedge down against the bar, and the greater the pressure upon the jaw the more firmly will the wedge be pressed against the bar. Thus the movable jaw may be readily slid along the bar toward the fixed jaw and is automatically locked against backward movement. \Vhen it is desired to move the movable jaw away from the ii-Xed jaw, the wedge is drawn back against the tension of the spring and at the same time raised away from the bar by a tailpiece secured to the wedge and passing over a fulcrum on the movable jaw.

Referring to the drawings, Figure 1 is a side elevation of a wrench embodying the present improvements in their preferred form, and Fig. 2 is a transverse sectional view.

As shown in the drawings, the handle of the wrench consists of a metal bar 1, at the end of which is formed the stationary jaw 9. The movable jaw 3 is mounted to slide upon the bar 1 and is held in position upon said bar by a wedge-shaped block 4, one face of which engages the bar 1 and the other face of which engages an incline 5 upon the movable jaw. The wedge is held in engagement with jaw 3 and the bar 1 by a spring 6, which isinterposed between the back of the wedge and. a shoulder 10 upon the jaw. The edge of the bar 1 against which the wedge bears is preferably provided with serrations 2 and the engaging face of the wedge with corresponding serrations.

lVith the above construction the jaw 3 may be slid along the bar to move said jaw toward the jaw 9, and is automatically locked by the spring-pressed wedge, which yields to allow the forward movement of the jaw; but is forced against the bar 1 by any backward pressure upon the jaw, the force with which the wedge is pressed against the bar 1 increasing with the backward pressure on the aw.

In order that the jaw 3 may be conveniently moved back away from the jaw 9, the wedge 4 is provided with a rearwardly-projecting tailpiece 7, which passes through the spring 6 and through the shoulder 10 and is provided with an upwardly-curved end. The tailpiece overlies a pin 8, which forms a fulcrum for said tailpiece. When it is desired to' move the jaw 3 away from the jaw 9, this may be readily done by pressing the curved end of the tailpiece to raise and withdraw the wedge, when the jaw will slide freely in either direction and will be automatically locked against backward movement when the tailpiece is released.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a wrench, a bar provided with serrations, a movable jaw sliding thereon, a wedge engaging said movable jaw, and provided with serrations engaging the serrations on said bar, and a spring for yieldingly holding said wedge in engagement with said jaw and bar, substantially as described.

2. In a wrench, a bar having serrations, a movable jaw mounted to slide thereon, a serrated wedge engaging said jaw and bar, and having a rearwardly-projeeting tailpiece, a

spring interposed between said Wedge, and a shoulder on said jaw, and a fulcrum on said 10 jaw for said tailpiece, substantially as described.

, DANIEL A. SEAMANS.

Vitnesses:

R. A. Barns, W. II. THURSTON.

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