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Publication numberUS546173 A
Publication typeGrant
Publication dateSep 10, 1895
Filing dateApr 16, 1895
Publication numberUS 546173 A, US 546173A, US-A-546173, US546173 A, US546173A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 546173 A
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Description  (OCR text may contain errors)

(No Model.) I

' J. M. MARTIN, J1.

NUT LOCK. No. 546,173. Patented Sept. 10,1895.

I awe/Whom,



SPECIFICATION forming part of Letters Patent No. 546,173, dated September 10, 189 5.

Application filed April 16, 1895. SerialNo. 545,932. (No model.)

To aZZ wit/072?, it may conoerm Be it known that I, JOHN M. MARTIN, Jr., a citizen of the United States, residing at Martin P. 0;, in the county of Marion and State of Florida, have invented certain new and useful Improvements in Nut-Locks; and I do hereby 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.

My invention relates to improvements in nut-looks; and it consists of certain novel features hereinafter described and claimed. Reference is had to the accompanying drawings, in which the same parts are indicated by the same letters throughout the several Views.

Figure 1 represents a side elevation of a bolt of ordinary construction having a nut thereon locked by myim'proved nut-lock. Fig. 2 represents a view of a bolt and nut together with the nut-lock all ready for assembling, the nut shown being of the hexagonal type, but any other form of nutrnay be used. Fig. 3 represents a transverse section through the threaded portion of the bolt, showing the nutlock in the proper position therein when but one look is used. Fig. 4 represents a transverse section of a similar bolt when two locks are used. Fig. 5 represents a wire loop shaped like a hairpin and adapted for use in the bolt; and Fig. 6 represents asimilar wire loop having the parts hammered together, so as to fit snugly in the groove in the bolt, as will be hereinafter described.

A represents the bolt, which is of ordinary construction and is provided with the ordinary screw-thread a and also with a longitudinal groove aflcut transversely through the screw-threads, as shown in Figs. 1 and 2.

B represents a nut of any ordinary or desired type. Thus in Fig. 1 the said nut is represented as quadrangular, and in Fig. 2 as hexagonal, but the exterior shape of the nut has nothing to do with my invention.

The nut-lock proper consists of one or more pairs of wires 0, which may be either made separately, as shown in Fig. 2, or connected together to form the loop, as shown in Figs. 5 and 6. These wires are made of such a size relative to the groove a that they will lie parallel in said groove, but will project up above the base of the screw-threads n. Thus as the nut is screwed home it will out parts of male threads on these wires, which threads will register with the threads on the bolt. For facility in starting the nut on the bolt the groove a is preferably made somewhat deeper near the outer end, so as to let the nut be readily screwed onto the first two or three threads, and thus take a firm hold before it begins to cutthe threads on the wires 0. These wires 0 are preferably ordinary softiron wires, such as are used for binding up hay, but wires of copper-or brass or any other metal softer than steel may be used, if dedesired. In practiceit will be onlynecessary to use one pair of the said wires, but two or more pairs maybe used, if desired. Thus in Fig. 4 I have shown two pairs of the said wires mounted in corresponding grooves in the bolt.

The invention is used as follows: The wires 0, whether made separate, as in Fig. 2, or connected together, as in Fig. 6, are laid in the groove a, as indicated in dotted lines in Fig.

2. Then the nutis screwed home, cutting as it is screwed down male threads on the wires, and thus firmly holding the said wires against being pulled out longitudinally from the said groove. Now when the nut is screwed home the protruding ends of the wires (shown most clearly in Fig. 2) are seized with a pair of pinchers or other tool, and the two wires are twisted together, as shown in Fig. 1. The twist in the said wires will prevent the nut from turning backward thereon, while the threads cut in the wire by the said nut will prevent the said wires from being Withdrawn longitudinally, and thus a safe, cheap, and simple nut-lock is obtained. In order to unlock the bolt, raise the free ends of the wires sufficiently to grasp them with the pinchers, untwist the same, and then unscrew the nut, which may be readily done without injury eitherto the boltor to the nut. Thusit. willbe seen that the herein described nut-lock is not only a safe look, but may also be readily un' locked.

The herein-described nut-lock is especially adapted for use on vehicles, plows, or farm implements generally, where wires can ordinarily be found suitable in every way for the purpose, and where it is of especial importance to have cheap, simple, and safe locks for threaded bolt and a groove or grooves therein the nuts. across the screwthreads, of a nut screwed on It will be obvious that three or more wires to said screw -threads, and a plurality of 15 or even astrand of wire rope may be used in Wires lying in said groove or grooves and out 5 place of the two wires herein referred to. into by said nut and twisted together in rear The various advantages of the herein deof said nut, substantially as described. scribed construction willreadilysnggest thein- In testimony whereof I affix my signature selves to any practical mind. in presence of two Witnesses.

Having thus described my invention, What JOHN M. MARTIN, JR. I o I claim, and desire to secure by Letters Patent lVitnesses:

of the United States, is JOHN 0. WILSON,

In a nut-lock, the combination with a screw- MAURICE J. SIOUSSA.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3308866 *Jun 7, 1965Mar 14, 1967RussellThreaded member anti-loosening device
US4895485 *Oct 5, 1988Jan 23, 1990Rexnord Holdings Inc.Locking key for threaded insert
US5947668 *Aug 31, 1998Sep 7, 1999Thommes; FriedrichSelf-retaining bolt
US7462008Feb 28, 2005Dec 9, 2008Pilgrim Screw CorporationStructural fasteners and components thereof
Cooperative ClassificationF16B39/32, Y10S411/944, Y10S411/939, Y10S411/924