US556682A - Robert larter - Google Patents

Description

(No Model.)

R. LARTER. LOUK NUT.

No. 556,682. Patented Mar. 17, 1896.-

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UNITED STATES PATENT ROBERT LARTER, OF NEXVARK, NElV JERSEY, ASSIGNOR- OF ONE-HALF TO JOHN B. SCARLETT, OF SAME PLACE.

LOCK-NUT.

SPECIFICATION forming part of Letters Patent No. 556,682, dated March 17, 1896. Application filed November 28, 1894:. {serial No. 530,234. No model.)

To (Z5 whom it may concern: and results, some of which may be referred Be it known that 1, ROBERT LABTER, a citito in connection with the description of the zen of the United States, residing at Newark, working parts. in the county of Essex and State of New .ler- The invention consists in the improved nut- 5 5 sey, have invented certain new and useful lock and in the arrangements and combina- Improvements in Lock-Nuts; andldo hereby tions of parts, all substantially as will be declare the following to be a full, clear, and hereinafter set forth and finally embodied in exact description of the invention, such as the clauses of the claim. will enable others skilled in the art to which Referring to the accompanying drawings, 10 it appertains to make and use the same, refin which like letters indicate corresponding erence being had to the accompanying drawparts in each of the views, Figure l is a secings, and to letters of reference marked tion of a railway-joint, showing the improved thereon,which form a part of this specifica nut-lock. Figs. 2 and are plans showing tion. the engaging faces of the two nut-like sec- 6 3 a This invent-ion relates to certain improvetions. Figs. 4:, 5, 6, and '7 show varieties of ments in that class of nut-locks in which two the said nut-like sections. Fig. 2 is a side nut-like parts or sections, each provided with view of the section, having radial teeth at but locking-teeth on their engaging faces, coact one side of the center perforation, and Fig. with areversely-threaded bolt or shaft to se 8 is a detail showing a form of bolt. which is 7:) 2o cure the desired lock, the invention being apsometimes preferred.

plicable to bolts, axles, shafts, or similar de- In said drawings, a indicates a railway-rail; vices, to railway-joints, vehicles or machinery Z), the fish-plates thereof; 0, the bolt uniting of any kind. said parts, and (Z c the lock-nuts arranged Heretofore in certain lock-nuts of which I on threaded end of said bolt. Said bolt is am aware the locking-teeth and contiguous of reduced diameter at its extremity oppofacing surfaces of the said sections were made site the head, and is oppositely threaded, the to conform and coincide each with the other threads f of the reduced extremity being of when in locked engagement, and the said surthe same number to the inch as those 9 on faces on all sides of the central perforation the larger part of the bolt adjacent to said 0 came in contact. By this construction it was reduced part. Upon the larger threaded part necessary in fastening the parts to first g of the bolt is arranged the section d, which tighten the inner or chief not against the fishis provided on its outer face at one side of the plate or other part with which the bolt is used, threaded center perforation with a pluralthen to bring the second nut near to the first, ity of radial teeth h, the opposite side of 3 the teeth of one matching with those of the said face across the perforation being devoid other, and then to apply a wrench to both of such teeth and being set back, so that the nuts and turn them backward together and nut is of reduced thickness to allow a free thus bring them to hear one against the other play or movement of the teeth of the outer to secure the desired lock. By this back not to allowatilting of the outer nut, as will 0 4o movement of the nuts away from the fishbe hereinafter described. At one side of the plate or part to be fastened there is a failure said teeth the same are provided with a long in securing the rigidity of fastening generor gentle incline i, as shown in Fig. 2, and ally desired. By my construction I secure on the other with an abrupt inclination j, the

the desired rigidity and avoid the necessity first inclination serving to allow a compara- 5 45 of back movement. tively easy passage of engaging-teeth and the The objects of the invention are to secure second a more difficult return movement. a more certain and positive fastening of parts, The teeth It on the section (Z are preferably to more perfectly resist the loosening action more than one in number, as indicated in occasioned by constant jarring, to dispense Figs. 2, a, and 6, the greater the number o with spring-washers and thus reduce the cost within a given limit the more nicely the adof fastening, and to secure other advantages justment when the parts are in locked relation, as will be understood. When in said locked relation the two locking sections do not present meeting surfaces on all sides of the bolt, as in prior devices above referred to, but one of the nuts or sections is materially cut away, as indicated in Fig. 2, so that there will be an open space between the nuts or sections at the sides opposite the teeth h, and this space admits of a change of inclination of the outer nut with respect to the inner nut when the teeth of the two nuts are forced past one another, such as would not be allowed were the nuts in engagement on all sides of the bolt, as heretofore.

The outer nut or locking section, e, is also provided with radial teeth of a shape similar to those of the section d, but in this case the series extends entirely around the center perforation, and so is adapted to enter into looking engagement at frequent points, so that there will be but little lost movement in securing a lock or return movement after the lock is eifected to secure a rigidity of parts.

The center of the outer nut around the central perforation is deeply cut or countersunk, as shown at k, the recess extending quite a distance back from the toothed faces. This admits of an increased springing of the bolt and coacts with the cut-away portion of the nut (Z in allowing a passage of the teeth h over those of the opposite nut or section. The countersink or recess it also admits of a greater range of adj ustability, in that the nut e can pass inward over the shoulder form ed by the reduced outer end of the bolt. The resilience of the bolt is increased or rendered more easily effective by reducing the diameter of the bolt between threaded parts, as indicated more clearly in Fig. 8. By the construction described, I am enabled by a strong wrenching force upon the outer nut, e, to turn said nut either forward or backward independent of its co-operating nut, and this is rendered more easy because of the opposite inclines 'L' and It is not necessary to back the inner nut against the outer one after said inner nut has been screwed in place against the fish-plate in order to secure an interlocking of parts, but I first secure a proper engagement of the inner nut with said fish-plate and then screw the outer nut up to said inner nut and thus effect a locked engagement, the teeth It sliding over the continuous series because of the cut-away opening at one side of the bolt and the resiliency of said bolt, all as will be understood.

To unlock the inner nut the outer nut is simply turned in the reverse direction, the abrupt incline of the teeth It allowing such reverse movement.

I am aware that nuts have been provided with a single locking-tooth on one side of the center perforation to engage a continuous or regular series of teeth on a co'operating nut; but in the present case I employ a plurality of such teeth and thus secure a different ef feet in locking, in that the action of the nut is more regular and positive and has less of a certain wrenching effect by which the bolts are broken.

Having thus described the invention, what I claim as new is 1. The combination with the bolt having a diametrically-reduced part between the differing threads, f and 9, thereof, of a nut having teeth on one side of the bolt-perforation only, and a co-operating nut having a continuous series of such teeth, substantially as set forth.

2. The combination with the bolt, diametrically reduced at its end and having threads fand g, of nuts or sections d and 6 having threads to engage those of the bolt and having teeth on their engaging faces adapted to enter into locking engagement, the teeth of one of said nuts being oppositely inclined, and one of said nuts being cut away out of correspondence with the other, a space being formed between allowing of a change of inclination of one nut to the other and sage of the oppositely-inclined teeth over those of the co-operating nut, substantially as set forth.

In testimony that I claim have hereunto set my hand November, 1894:.

the foregoing I R0121. LARTER. lVitnesses:

CHARLES II. PELL, LoUIsE L. BRowNE.

a pasthis 24th day of q;

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