US703636A - Wrench. - Google Patents

Description

A Pa'ten'ted luly I,l902. G. W. BUOZEB.

Na.y 703,636.

WRE NC H.'

'Application led Nov. 11, 1901.)

(No Model.)

Hmm mmmmmmmmmmmmm hereby declare the following to be a full,rclear, and exact description of the invention, such as will enable others skilled in the art to which UNITED STATES` vPATENT OFFICE..

GEORGE W. BOOZER, OF SAN ANTONIO, TEXAS.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 703,636, dated July 1, 1902. Application iled November 11,'1901. Serial No. 81,896. (No model.)

T0 ctZZ whom it 11i/Cty concern.-

Beit known that I, GEORGE W. BooZER,A

Antonio, in the county of`BeXar and State' of Texas, have invented' certain'n'ewand useful Improvements in Wrenches; andI do it appertains to make and use the same.

My invention relates to improvements in wrenches; and it consists in the improved means for operating the movable jaw thereof.

In the accompanying drawings, illustrating my invention, and in which like parts are designated by the same letters of reference in the several views, Figure 1 is a side elevation of my improved wrench, the handle thereof being broken away and showing the movable jaw in section. Fig. 2 is aperspcctive view of the lever for operating the clutchplate; and Fig 3 is a side elevation of Jthe fixed jaw, showing the milled surface on the inner side of the shank.

a represents the side of the shank of the wrench provided with the usual handle, (not shown,) and b is the fixed jaw of the same.

c represents a movable jaw, which is hollowed out or recessed, as at d, and provided with the connecting webs or ears e f, engaging the outer surface of the shank. The recess dis enlarged at its upper end, as at g, and extends into the projecting portion which forms the gripping-surface offthe movftbley In this enlarged portion g ofthe recess Jaw. is fitted the movable clutch-plate h, provided with Ythe angular and milled surface fi, adapted to engage with the milled surface j on the inside of the shank of the wrench. The

Vplate h being loosely mountedin the enlarged portion ofthe recess is free to move upwardly Vor downwardly for a certain distance, but on account of the shape of the recessV the outer or rounded edge of the plate-is capable only of a comparatively limited movement. This clutch or locking-plate h is also provided onV vided with the curved shoulder n, engaging the curved lug k for operating the lockingplate h. The leverf'fl is alsorprovided with the lug o, adapted to engage in a shallow groovep, disposed longitudinally of the shank ofthe wrench, and acts as the fulcrum of the lever. Lugs q are formed on the sides of the :le'ver' and en gage a coiled spring r, surround- 'ing the lever and supported at its other end .by'the base of the movable jaw. Althoughv I have shown a coiled spring surrounding the lever it will be obvious that any other suitable method of retaining the lever and locking-plate in the proper position relative to each other may be employed, if desired. It will be understood that the base of the movable jaw is suitably slotted, as at s, to allow of the passage of the lever Z therethrough.

The operation of the device is as follows: When the wrench is to be disengaged from the nut or bolt operated upon, the operator presses inwardly on the curved linger or handleof the lever, which, turning on its fulcrum o, presses outwardly and downwardly on the curved lg 7c of the locking-plate, releases the same from engagement with the milled surface of the shank, and allows the jaw to be moved freely in either vdirection on the shank. The spring r being compressed during the inward and slightly-downward movement of the lever will, upon the lever being released, force the locking-plate or clutch back again into engagement with the milled 'surface of-` the. shank, thus preventing further downward movement 'of the movable jaw.

Whiletheflever isin lthe position shown in Fig.'1 it is Jtherefore obvious that any attempt to move the movable jaw away from the fixed jaw will make the locking-plate bind tighter against the shank, to be released s only by operating the lever. It is also obvious that the movable jaw` can'at all times be moved toward the xed jaw, independent of the operation of th'elever. A

WhileIwhave described my-invention in .detail asf above,-it-is evident that various ICO having an enlarged recess in the upper portion thereof extending into the projecting lip of said movable jaw, a locking-plate loosely mounted in said movable jaw engaging at one end said enlarged recess and at its other end said shank, and a lever engaging said locking-plate and movable transversely of said movable jaw for disengaging said locking-plate and shank.

2. In a wrench, the combination with the fixed jaw and milled shank, of a hollow movable jaw provided with an enlarged recess in the upper portion thereof, a locking-plate, loosely carried in said hollow movable jaw, engaging at one end the wall of said enlarged recess and at its other end provided with a milled angular surface engaging said milled shank, and a lever engaging said lockingplate and movable transversely of said hollow jaw for disengaging said locking-plate and shank.

3. In a wrench, the combination with the shank and xed and movable jaws, ot' a locking-plate carried by said movable jaw and engaging said shank, a curved lug formed on said locking-plate, and a spring-controlled lever provided with a curved shoulder engaging said curved lug and movable transversely of said movable jaw for releasing said locking-plate.

4. In a wrench, the combination with the fixed jaw and shank, a shallow groove disposed longitudinally of said shank, a hollow movable jaw provided with an enlarged re cess, a locking -plate mounted in said enlarged recess and engaging said shank, a lever engaging said locking-plate and a lug on said lever engaging said shallow groove and adapted to act as the fulcrum of said lever when the lever is moved transversely of the hollow jaw for releasing the locking-plate.

5. In a wrench the combination with the ixed jaw and milled shank, of a hollow jaw provided with an enlarged recess at the upper portion thereof, a locking-plate loosely mounted in said enlarged recess and engaging said milled shank, a curved lug formed on said locking-plate, a lever carried by said movable jaw, provided at one end with a curved finger or handle portion and at its other end with a curved shoulder adapted to engage said curved lug on the locking-plate, lugs formed transversely of said lever, anda spring engaging said transverse lugs and said movable jaw for retaining said lever in position.

In testimony whereof I alix my signature in presence of two witnesses.

GEO. W. BOOZER.

Vitnesses:

T. S. CUNNINGHAM, G. C. CoNvERs.

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