US289271A

US289271A - Device for upsetting and restoring screw-threads

Info

Publication number: US289271A
Authority: US
Publication date: 1883-11-27
Anticipated expiration: 1900-11-27

Description

(No Model.)

' M; KE'PLER.

DEVICE FOR UPSETTING AND RESTORING SCREW THREADS. No. 289,271. Patented NovJZ'Y, 1883.

' 7 :ATTORNEYS V WITNESSES N. PEIER$. mow-ma um. wnhin m. n. c

. UNITED STATES PATENT OFFICE.

MARTIN KEPLER, OF DEEDSVILLE, INDIANA.

DEVICE FOR UPSETTINGAND RESTORING SCREW-THREADS.

SPECIFICATION forming part of Letters Patent No. 289,271, dated November 27, 1883.

Applicatidn filed June 23,1883. (to model.) i

'To all whom it may concern.-

Be it known that LMARTIN KEPLER, a citizen of the United States, residing at Deedsville, in the county of Miami and State of Indiana, have invented certain new and useful Improvements in Devices for Upsetting and Restoring Screw-Threads; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being. had to the accompanying drawings, andto letters or figures of reference marked thereon, which form a part of this specification.

Figure 1 of the drawings is a side view of my device. Fig. 2 is an edge view of the same, and Fig. 3 is a detail perspective view.

This invention has relation to devices for upsetting and restoring the screw-threads on bolts and rods, whereby the nuts employed on said rods or bolts maybe locked and unlocked at pleasure; and it consists in the construction and novel arrangement ofv parts, as will be hereinafter fully described, and particularly pointed out in the claim appended.

Referring by letter to the accompanying drawings, a and b designate two jaw-levers, which are pivoted together at c. The jaw of the lever a is formed with two bent claws, (Z and e, the claw dbeing longer than the claw e. The ends of these claws are curved inwardly, as shown. and have a space, 9', between them. The other lever-jaw, l), is formed with claws k and Z, the claw k being the longer of these tw which are both shorter than the claws d and e, and have their ends curved inwardly toward the concavities m m of the claws d and 6, respectively, as shown. The point of the longer claw, 7c, of the lever-jaw b is provided with a small beveleddog, n,which is intended to bite into the threads and upset them, for a purpose hereinafter explained. The point of the shorter claw, Z, of the leverjaw b is provided with a pointed dog, o,wl 1ich is designed to travel in the groove of the threads to restore threads that have been previously upset to their normal position.

To use the device for looking a nut in place on a bolt or rod, the nut is first turned up to place by means of a nut-wrench, and the longer claw,d, of the lever b is hooked around the proj ecting threaded portion of the bolt or red close upon the nut, and by closing the jaw it upon the threads the dog n will bite upon them, and when the device is turned by its levers a short distance the dog a will upset or flatten several of the screw-threads immediately at the face of the nut, which will lock it so that it .cannot be turned off. To unlock the nut, turn the device over so that the claws e and Z will engage the bolt. Then hook the shorter claw, e, on the lever-jaw,a, around the threaded portion of the bolt, letting said claw e rest against the face of the nut. Close the shorter claw, Z, upon the threads tightly, and turn the device around upon the threads until the pointed dog 0 of the clawl shall have restored the upset or flattened threads, when the device may be removed andthe wrench employed to unscrew the nut.

As will readily be seen, no two of the claws are of the same length. I

This device is cheap, simple, and effective, and its utility is obvious.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

The herein-described device for upsetting and restoring threads on bolts and rods, consisting of a pair of pivoted jaw-levers each having two inwardly-curved claws of different lengths, the claws of one of the lever-jaws being provided with the dogs a and 0, substantially as specified.

In testimony whereof Iaffix my signature in presence of two witnesses.

MARTIN KEPLER.

Witnesses:

F. W. HUTcHIsON, HARRISON GRIMEs.