US1465015A

US1465015A - Nut lock

Info

Publication number: US1465015A
Application number: US590098A
Authority: US
Inventors: Marshel F Lerch
Original assignee: LERCH SHUMATE BOLT CO
Current assignee: LERCH SHUMATE BOLT CO
Priority date: 1922-09-23
Filing date: 1922-09-23
Publication date: 1923-08-14
Anticipated expiration: 1940-08-14

Description

Aug.

M, w23. www5 M. F. LERcl-l NUT LOCK Filed Sept. 23. 1922 Y Patented ug. 14, 11923..

NITED MARSHEL F. LERCH, F LOUISVILLE, KENTUCKY,` ASSIGNOR, BY DIRECT AND MSNE ASSIGNMENTS, T0 THE LERCH SHUMATE BOLT CO., 0F LOUISVILLE, KENTUCKY,

A CORPORATION or KENTUCKY.

` NUT Application lcd September To all whom t may concern:

Be it known that MARSHEL F. LERCH, a citizen of the United States, residing at Louisville, in the county-of Jefferson and 6 State of Kentucky, has invented certain new and useful Improvements in Nut Locks, of which the followin is a specification.

This invention re ate's to devices for preventing the unscrewing of nuts from bolts and has special reference to an improved lock nut.

Many lock nuts have been invented but it is found that most of these are of such complicated construction that they cannot be manufactured on the ordinary types of automatic machinery. This makes these lock nuts-entirely too expensive for practical use as well as too slow of manufacture.

'One important object of the invention is to provide an improved form of lock nut which may be made on the ordinary nut machine commonly used in manufacturing' plants where such articles are made, and which, when so made, will be capable of being1 turned out in large quantities economica y.

Another objection which has existed in manyof the locking devices heretofore employed .or which have been suggested for employment is that .these devices are too com licated 4for general use some of them emp oying a system of springs, pawls, and ratchets.

A second important object of the invention isv to provide an improved lock nut consisting of but one piece of metal of simple construction and capable of rough usage.

A third important object of the invention is to produce Aa novel form of lock nut eo which will hold on the bolt in a perfectly secure manner so that no amount of vibration or shaking will loosen it.

With the above and other objects in view as will be hereinafter apparent2 the invention consists in general of certain novel de-4 tails of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings and specifically claimed.

In the accompanying drawings, like characters of reference indicate like parts in the several views, and

Figure 1 is a section through a pair of LOCK.

23, 1922. Serial No. 590,098.

plates showing the application of the lock nut thereto.

Figure 2 is a side elevation of the lock nut.

Figure 3'is a bottom view thereof.

Figure 4 is a detail section of the nut.

Figure 5 is a view showing the position in which the lower part of the nut is forced when the same is applied in locking a standard nut in position.

This lock nut is intended to be used with a bolt havin a portion 10 provided with the usual rig t hand threads and a reduced portion 11 provided with left hand threads. On the portion 10 is screwed, when employing the device, a nut 12 of the ordinary standard type either thin as shown in Figure 1 or the full thickness as shown in Figure 5. The lock nut proper comprises a main or body portion 13 from which depend, at the sides of the nut, a series of lugs 14. The nut is provided with the usual bore 15 threaded internally and the lower part of this nut is countersunk as at 16 so that it slips readily over the threads 11 and thus enables the threaded bore 15 to be engaged on the threads of said portion l1. n-the form show n in Figure `1 this bore is not undercut so that the lugs 14 are ofuniform thickness from top to bottom but in the form shown in Figures 4: and 5 the bore 16 is undercut so as to provide, at Jthe lower end of each nut, an inwardly projectin flange 17 and the under faces of these ugs in this form are inclined as at 18 so that when applied to lock a nut 1:2 :in position, as shown in Figure 5, the tendency of the lugs is to move inward. It is to be noted that the position shown in that figure is somewhat exaggerated in order to bring out more clearly the-tendency due to the undercutting and bevelling of the lower surface. In each of these forms when the lock nut is screwed downward the side edges of the lugs grip tightly in the top of the nut to which they are applied and thus prevent backward rotation in a more effective manner by far than the usual left hand nut without depending lugs. It will be observed that due to the resiliency of the material from which the nut is made, the springing in of the arms will be resisted, and that when the arms are thus sprung in, which is accomplished by their movely tend to spring out, but this is resisted by ing undercut to provide 'inwardly extending.

the downward inclination of the arts 18 so that the two nuts are held toget er lbythe owerful frictional engagement of the bent iiigs of the upper nut with the lower nut.

There has thus been provided a simple and cfiicient device of the kind described and for the purpose specified:

Having thus described the invention what is claimed as new, is

1. A lock nut consisting of a, body portion having a threaded bolt receiving opening, and lugs depending from the body portion at each of the flat sides of said nut and lo-` cated centrally of said flat side, said lugs befianges at the bottom, the under faces of said anges and lurrs bein inclined inwardly and downwardly rom lt e outer faces of the same.

2. A lock nut consisting of a body portion having a. threaded bolt receiving opening, y

and lugs depending from the body portion at each 'of the Hat sides of said nut and located centrally of said fiat side and having their lower lateral edges sharp whereby to bite into the surface to which the nut is ap`l plied, said lugs being undercut to provide inf MARSHEL E. LE CH.