US1404581A - Self-locking wrench - Google Patents

Description

I. CIERPIAL.

SELF LOCKING WRENCH.

APPLICATION mm APR. 6.4921.

Patented Jan. 24, 1922.

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UNITED STATES PATENT OFFICE.

IGNACY CIERPIAL, OF SOUTH BEND, INDIANA.

SELF-LOCKING- WRENCH.

Application filed April 6,

T 0 all whom it may concern:

Be it known that I, IGNACY G'IERPIAL, a citizen of Poland, residing at South Bend, county of St. Joseph, and State of Indiana, have invented certain new and useful Improvements in Self-Locking Wrenches, of which the following is a specification.

This invention relates to improvements in tools, particularly wrenches, and it is the principal object of my invention to provide a wrench which ,allows a free displacement of the movable i 'aw, to bring the same quickly in its nut engaging position with respect to the stationary jaw for readily accommodating the tool to any size of nut to be operated upon.

A further object of the invention is the provision of a wrench of this type which allows a locking of the movable jaw in its adjusted position by the operation of a worm spindle.

With these and other objects in view, I have devised the novel wrench which I will now describe, referring to the accompanying drawing forming a material part of this disclosure, and in which- Figure 1 is a side view of a wrench constructed according to the present invention,

with the movable jaw in its nut engaging position, part of the handle cover being broken ,away to show the interior arrangement, and

Figure 2 is a top edge view of the wrench. The wrench comprises a handle preferably formed by a metal frame 10 to which the side or lateral cover plates 11 are secured by rivets 12 or the like. I The stationary jaw 13 and its shank 14 are integrall made with the-frame 10, and the movable jaw 15, having a socket for the passage of the shank 1 1 of the stationary jaw, is provided with an integral shank 16 extending into the frame 10 between the cover plates 11 thereof, and having a worm adapted to engage a worm 17 on a spindle 18.

The upper end of this spindle 18 is formed into a head 19 movably held in a recess 20 of the shank 14, while the lower end of the spindle 18 is smooth, i. e., without worm as shown at 21 and has slidably secured thereto by means of inner keys 22a milled knob 28 which however can rotate with spindle 18, as soon as it engages its square part 21.. Between this knob and the end of the worm on spindle 18, a spiral spring 24: is

Specification of Letters Patent.

Patented Jan. 24, 1922.

1921. Serial No. 459,050.

surrounding the smooth part of the spindle 18.

At the lower end of the frame 10 a seat 25 is secured to the inner wall of the frame and a shoulder 26 is formed within the frame oppositely disposed and above the seat 25.

The wrench operates as follows- 1n the position of the parts illustrated in Figure 1, the movable jaw 15 is locked against free movement on the stationary jaw 13, by the engagement between the worms and is unlocked from its nut engaging position by sliding theknob 23 against the action of spring 24 on the spindle 18 until it is free to be swung upon the seat 25 by a lateral movement imparted to the spindle 18 moving its head 19 in the recess 20 and swinging knob 23 between the seat 25 and shoulder 26 in which position it will be held by the tendency of the spring 24 to expand, allowing a free sliding movement of the movable jaw on the stationary jaw.

In the position shown in Figure 1, the movable jaw can be moved against a nut by the rotation of the knob 23 and spindle 18. The lower end of the spindle 18 projects below the knob 23 and normally rests upon the lower, inner and curved end wall of the frame.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is- 1. A wrench of the class described comprising a stationary jaw and a movable jaw having a socket adapted to be displaced along the shank of said stationary jaw, a movable spindle, a spring controlled knob at the lower end of said spindle, means for receiving said knob upon the lateral displacement of said spindle, for unlocking said movable jaw, to allow its free displacement on the stationary jaw, and means for allowing a tightening of said movable jaw in its locked, nut engaging position.

2. A wrench of the class described comprising a stationary and a movable jaw adapted to be displaced along the shank of said stationary jaw, a worm on the lateral edge of said movable jaw, a hollow handle for said stationary jaw provided with an upper recess, a spindle having a head movably held in the recess of said handle, a worm extending over the greater part of said spindle, adapted to be engaged by said worm on the movable jaw, a knob keyed to socket for the passage of the shank of said stationary jaw, a lateral worm on the shank of said movable aw extending into said handle, a worm spindle having an upper head movably secured in the recess of said handle, its worm adapted to be engaged by the worm of the shank of said movable jaw,

a lower smooth part on said spindle, a knob keyed to the smooth part of said spindle to slide thereon .and to rotate therewith, a spring between said knob and the lower end of the worm on said spindle, a seat, and a shoulder co-operating therewith'in the lower part of said handle adapted to receive said knob therebetween upon the lateral displacement of said spindle and to lock the same in its position by the intermediary of said spring, for disengaging said worm, said knob adapted to be rotated to rotate the spindle for engaging its worm with the worm on the shank of said movable jaw to allow a tighteningof the movable jaw in its nut engaging position while being in its locked position.

In testimony whereof I have affixed my signature.

IGNACY CIERPIAL.

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