US1502892A

US1502892A - Automatically-closing wrench

Info

Publication number: US1502892A
Application number: US610544A
Authority: US
Inventors: Walz Fredrick
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-01-03
Filing date: 1923-01-03
Publication date: 1924-07-29
Anticipated expiration: 1941-07-29

Description

July 29', 1924. 1,502,892 v F. wALz AUTOMATICALLY CLOSING WRENCH Filed Jan. 3. 1923 4IIIIIINIINN Patented duly 29, lQ/sl@ ius.

AUTOMATICALLY-CLOSING WRENCH.

Application led. January 3, 1923. Seriall'o. 610,544.

T0 all .1U/bom t may concern Be it known that L Fnnnnrck Wang, a citizen of the United States7 residing at Burnside. in the county of Hartford and State of Connecticuta have invented a new and useful improvement in Automatically- Closing lrenches7 ot which the following is a specification.

This invention relates to the type of quick closing wrenches. These wrenches have a spring arranged to torce the movable jaw toward the lixed jaw when a locking stem is released by pressure of the thumb on a locking plunger which normally engages the locking stem and holds the movable jaw tast7 whereby in order to apply the wrench to a nut or bolt or other part to be held or turnedU it is only necessary to open the jaws, hold them adjacent to the element to be gripped and then press inwardly the locking plunger and allow the springto close the jaws on the part.

The object of the present invention is to provide a very simple, cheap and strong construction which is easily and conveniently manipulated and which has a line adjustment.

In the accompanying drawings Figure l shows the invention embodied in a structure having jaws of the monkey wrench type. Fig. 2 shows a top view ot the same. Fig. 3 shows a section on the plane indicated by the dotted line 3-3 on l. Fig. i shows the wrench head with ninety degree jaws and one hundred and twenty degree jaws. Fig. 5 shows the head with ninety degree aws and pipe gripping jaws.

The handle l of the wrench is desirably made ot' metal but can be formed of other suitable material. The fixed jaw 2, which may have a ninety degree tace or a one hundred and twenty degree tace or pipe teeth or combination of these as illustrated in the views is connected with the handle in the embodiment illustrated by a pair of rods 3 that pass through perforations in the jaw and into sockets in the end of the handle. These rods may be circular in cross section and may be cut from what is known as drill rod. A pin 4 is driven through the iiXed jaw between the rods. and a pin 5 is driven through the handle between the rods for securing them in place. The only machining required for such an attachment of these parts is accomplished by mere drilling;

rlhe movable jaw 6 fits and slides upon the rods that join the lixed jaw and the handie. A locking stem 7 is fastened to the movable jaw and it extends into a longitudinally extending bore 8 rin the handle. This stem is provided with 1ine teeth 9 which desirably are in the shape of screw threads. Back of the locking stem in the bore in the handle is a spring l0 arranged to thrust the stem, outward. The spring is held in by a screw plug 1l threaded into the bore at the end of the handle after the spring has been placed in the bore. The locking stem passes through an opening 12 in a locking plunger 13 which is tree to slide in a transverse bore in the handle. The opening in the plunger is somewhat larger than the diameter of the locking stem and on the inner wall has teeth 14.- shaped to tit the teeth of the locking stem. A spring l5 is arranged in the transverse bore in the handle to normally push the plunger outward and cause the teeth on the wall of the opening through the plunger to engage the teeth on the locking stem. lVhen the plunger is pushed inward the teeth are disengaged releasing the stem and permitting the spring to .thrust the stem outward and carry the movable jaw toward the fixed jaw against anything placed between the jaws that it is desired to grip. wWhen pressure on the plunger is released its teeth engage the teeth on the stem and lock the parts so that the mc-vable jaw cannot be moved from its pesition` The teeth on the locking stem are quite fine so that the adjustment of the movable jaw will be close. The elements oi this structure are very simple to manufacture and assemble. It is easy tc release the locking stem and allow the spring to close the movable jaw, yet when the locking plunger is engaged with the locking stem the movable jaw is very strongly held This wrench can be manipulated and applied to a nut, bolt heador other part to be held or turned` by one hand.

The invention claimed is l. A wrench having a handle with a longitudinnally extending bore and a circular socket extending transversely across said bore, a iixed j aw, means connecting the fixed jaw with the handle7 a movable jaw slidin on saidlconnecting means, a circular threa ed rod extending from the movable jaw in front of said connecting means into and substantially tting the bore in the handle,- a

spring arranged in said bore and adapted to thrust the rod outward, a cylindrical plunger located in the transverse socket in the handle, said plunger having a transverse opening through which the threaded rod ext-ends, the inner Wall of said opening having teeth, and a spring in the Socket thrusting the plunger outward and Causing the engagement of the teeth on the Wall oif the opening through the plunger with the threaded rod.

' 2. A Wrench having a handle, a pair of round rods Withtheir ends extending into round openings in the handle, a jaw with round openings fitted on the outer ,ends of said rods, a pin extending transversely of the handle between the rods and a pin eX- tendingV transversely of the jawv between the rode 'for locking the rods to the handle and the jan' to the rods, a movable jaw slidahlyY fitted on said rods between the handle and fixed jan' a threaded rod extending Afrom the movable jaw in front o the Connecting rods into a longitudinal 1oore in the handlei spring in the here in the handle and adaptn ed to normally thrust the threaded rod outward, a plunger located in a socket that opens through the front edge of the handle said plunger having an openintgl through which the threaded ro'd passes and haring teeth in one Wall ot said opening. and a spring' normalbY thrusting the plunger radially of the threaded rod and causing the engagement of the teeth.

FREDRICK WALZ.