US391284A - Nut-lock - Google Patents

Description

A. C.. VAUGHAN.

' Patent ed Oct. 16, 1888.

Unire STATES AARON C. VAUGHAN, OF SHANES CROSSING, OHIO. p

NUT-LOCK.

SPECIFICATION forming part of Letters Patent No. 391,284, dated October 16, 1888.

Application filed February 3, 189.51.. Serial No. 262.9113. (No model.)

To all whom, t may concern.-

Be it known that I, AARON C. VAUGi-IAN, of Shanes Crossing, in the county of Mercer and State of Ohio, have invented a new and useful Improvement in NutLocks, of which the following is a specification.

y invention is in the nature of an improved nut-lock for securely locking a nut upon a bolt to prevent accidental loosening,and which may be also used in some applications in the place of a nut.

It consists in the peculiar construct-ion of a nut possessing the following characteristics: First, the nutis made concave-convex and thin enough to have some spring when under the tension of a powerful wrench; secondly, it has a perfectly round hole in the center, which is threaded with a regular standard screw`thread, and, thirdly, the nut has a circular segmental hole cut entirely through its body and opening into the bolt-hole. These several features have heretofore been separately employed, and in some instances two of them have been com bined; but my invention consists in a nut which comprises all three of these features, between which there is a coactive relation, as will be hereinafter fully described.

Figure l is a face View of the lock-nut; and Fig. 2 is a sectional view of the same on the line x 00 of Fig. 1, showing it applied to the usual bolt and nut.

In the drawings, Arepresents the loclrnut, B the usual nut, and O the bolt. The locknut A is made of a plate of steel about onequarter of an inch in thickness. At the four corners a 1. a a the nut is flat; but an inner zone or belt, b, of the nut around the bolt-hole is stamped up into a concavo-convex form, as shown in Fig. 2. The bolt-hole is a perfect circle, and it is threaded with a regular standard thread corresponding to the bolt, so that it turns on the same freely without binding. Through this concavoconvex zone, and extending entirely through the body of the nut, is cut a circular segmental hole, c, which opens' into or communicates with the bolt-hole.

In making the lock-nut the plate is stamped into concave-convex form, and the bolt-hole and segmental hole c are cut by a descending die in one operation, and the bolt-hole is then threaded in the regular way in another operatione ln applying the lock-nut A it is simply turned upon the threaded end of the bolt, and is freely run up by the fingers until its corners a come in contact with the usual nut, the screw-threaded hole being of standard size and permitting this to be done. A strong wrench is then applied to the lock-nut A, and it is strained against the underneath bearingface until the threads of the lock-nut draw down the concave-convex zone b to a dat or 'nearly 'flat surface, as shown by the dotted lines in Fig. 2. As this zoneb is iattened, the inner circumference of the bolt-hole is contracted, as shown by the dotted lines in Fig. l, the opening c, extending through the zone b, giving sufficient clearance for this contraction to take place, and at the same time permitting a torsional spring Paction on the lines d d. As the nut is tightened by the final turn or two of the wrench, it will be seen that the four points a bear forcibly and with great frictional contact against the nut below, and as the buckle or convexity is taken out of the zone b the bolt-hole contracts and the threads ofthe latter tightly pinch the bolt, making an eXceedinglyirm and positive lock that effectually resists all loosening strains or vibrations.

The advantages of this lock-nut are as follows:

First. It is cheaply made, requiring only the two Operations in nut-making of punching and threading, and that, too, with a regular standard thread, the only change being in the form of the dies.

Second. It is quickly and freely turned on the free end of t-he bolt. As it is common to allow the threaded end of a bolt to project an inch or so beyond its nut, (to prevent stripping,) this involves a great saving of time and labor over that form of lock-nuts which bind all along the bolt while being turned on, and which not only require much time and labor to adjust, but also mutilate the thread.

Third. Vhile thc locking is effected only by the last turn or two of the nut, its binding effect is, by reason of its compound nature, of the most effectual kind and resists all loosening strains except those of a powerful wrench.

This lock-nut is made of steel, and the concavo-convex zone Z) constitutes a powerful spring, which allows the nut to resume its shape when removed from the bolt In some applications of my invention the 2. Thelock-nnt herein described, consisting lock-nut A may be used as a nut Without any of an elastic metal plate having Hat bearings nut B. Thus Whenever there is a solid metal a at its corners and a concavo-convex central bearing beneath and a light construction is to portion, Z2, having acircular bolt-hole through 5 be'desired, said lock-nut may be used alone. it with a regular screw-thread, and having an 2o Having thus described my invention,WhatI opening.7 c, extending entirely through the claim as new isbody of the plateand communicating with the 1. The lock-nut herein described, consisting bolt-ho1e, substantially as and for the purpose of a coneavo-convex plate having a circular described.

1o bolt hole provided with a regular screwthread, and an opening at one side of the bolt-V AARON C. VAUGHAN. hole extending entirely through the body of the plate'and communicating with the bolt- Witneeses: Y

hole, substantially as and for the purpose de D. RUSSELL NUTTALL,

15 scribed. J. PENRosE COLLINS.

Images