US1306418A - elfborg - Google Patents

Description

H. G. ELFBORG.

Patehted June 10,

1919. 2 SHEETS-SHEET 1.

H. G. ELFBORG. N U T L 0 C K.

APPLICATION LED AUG.2I. 1917- 1,306,41 8. Patented June '10, 1919.

' 2 EEEEEEEEEEEE 2- mmirmm'imrii I x W gig HENRY- G. ELFBORG, OF CHICAGO, ILLINOIS.

NUT-LOCK.

Specification of Letters Patent.

Patented June 10, 1919.

Application filed August 21, 1917. Serial N 0. 187,399.

To all whom it may concern: 7

Be it known that I, HENRY G. ELFBORG, a citizen of the United States, residing at Chicago,,in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Nut-Locks, of which the following is a specification.

This invention relates to a nut lock, and its purpose is to provide an improved device for preventing the accidental removal of a nut from the bolt with which it is used. In this highly developed art most looking devices are embodied in or adapted to be used with modified forms of nuts, so that the locking device cannot be manufactured as a separate and independent commodity to be used with standard nuts, but the nuts themselves must be specially constructed at great expense. It is the principal Ob ect of the present invention to provide an efficient locking device for use with any of the standard forms of nuts. A further object is to provide a modified form of washer having parts adapted to coact with a standard nut in order to lock'it in position on a bolt. Another feature is the provision of a device having parts to engage a standard nut externally, and having an aperture which is eccentrically located with respect to the threaded aperture of the nut, so that a.

frictional grip and binding action are produced when a locking device and nut are applied to the bolt, thus preventing loosening of the nut due to vibration or abrasion. An important advantage of the present invention is that it exerts an efficient locking action in all positions of the nut on'the bolt, so that the nut may be tightened or loosened at any time without decreasing the locking effect of the device.

Other objects and advantages will appear more fully from the following specificat on, taken in connection with the accompanying drawings, in which several embodiments of the invention are illustrated. v

In the drawings r t Figure 1 shows a perspective view of a bolt and nut securing certain members together, my improved locking device being employed therewith. p V

Fig. 2 shows a side elevation of the nut and locking device shown in Fig. 1.

Fig. 3 shows a side elevation of the nut and locking washer before the corners of the latterhave been turned upward to engage the sides of the nut.

Fig. 4 shows a sectional view of a modified form of the device illustrated in Figs. 1, 2, and 3.

Fig. 5 shows a sectional view through the device illustrated in Fig. 4, taken on the line 4-4.

Fig. 6 shows a sectional view, taken .on the line 66 of Fig. 4.

Fig. 7 shows another form of my invent lOIl used in connection with a nut and'bolt for securing two members together.

Fig. 8 shows a side elevation of the locking device illustrated in Fig. 7 with the nut seated thereon.

Fig. 9 shows a view of the locking washer illustrated in Fig. 8 with the nut removed.

Fig. 10 shows a planview of another form of my invention.

Fig. 11 shows a sectional View, taken on the line 11-11 of Fig. 10; and

Fig. 12 shows a planview of the locking washer shown in Fig. 10, with the nut and wear plate removed.

Although this improved locking device is adapted to be used with nuts in any position or location where it may be desired to prevent the accidental removal of a nut from a 1 bolt, I have for the purposes of illustration shownthe invention in Fig. 1 as employed in connection with a bolt 15 and a standard nut 16 for securing the fish plates 17 to a railway rail 18. .The bolt is threaded, as shown at 15, in the usual way, being provided at one end with a head 15", and being engaged on the threaded portion by the nut 16, which in the embodiment illustrated is a square nut, although the invention is capable washer they are turned upwardly, as shown in Fig. 2, to engage the lateral faces of the nut, so that as the nut is turned on the bolt the washer will turn with it. This plate 20 is provided with a threaded aperture 21, which is eccentrically located with respect to the threaded aperture 16 of the nut when the bolt the offset relation of the threaded V aperture will cause the washer to force the nut into binding engagement with the bolt and firmly holdthe nut against accidental movement on the bolt. Although the nut may be moved by means of a wrench or the like, the movement of the nut by the direct engagement of the fingers or the accidental removal of the nut from the bolt are effectually prevented. It will be understood that in the application of this form of my invention, the nut and washer are first placed in assembled relation before being applied to the bolt.

Figs. 4,5, and 6 illustrate a modified form of the device shown in Figs. 1,2, and 3. In j this modified form a, substantlally square plate 25 is employed, but instead of being turned'in an annular relation with respect to the lateral sides of the nut, as in the preceding embodiment of the invention, this 1 plate is provided with flanges 26 on its lateral sides, which are turned upwardly, as shown in Figs. 5 and 6, forming a rectangular recess adapted to receive the nut; The plate is provided with a threaded aperture 27, which is eccentric-ally located, that is,

it is displaced from the central point of the plate, so that in the application of the device to a bolt a locking pressure is produced. In'the application of. this form'of the invention to a bolt,. the washer is first placed. assembled relation with respect. to

a nut, and that-we members are then appliedito the bolt by means of a wrench.

In Figs. 7, 8, and 9, I have illustrated still another form of the invention. For convenience in illustrating this form I have shown abolt 3 0 engaged by a. standard nut 31 for holding together two members 32 and. 3.3. The locking device is embodied in a washer 3 l, of circular or other suitable form, having a centrally located threaded sperm-6.35 adapted to engage the threaded part i the bolt 30'. In this form. of the invention the locking efiect is p'roduced by meansof a curved shoulder 36, which projects fromthe face of'thewasher with "its inner'surfa'ce 36 located so thatits center 37 isdisplaced from the center of the washer and the center of. the apertiire After, placing the nut and washer together and applying them to the bolt, it will'be. seen. that, the corners of the nut 31 will ride on the surface 36", as illustrated inFig. 6, sothat the washer will he forced in a direction transverse to the axis, of the bolt, and thus set up anqefte'c'tive locking action which will prevent accidental removal of the nut, the

nut bein forced in a direction transversely the Washer is forced. This form of the, in-

vention requires but a slight modification of the usual washer, and may be constructed with very slight expense.

The form of the invention illustrated in F igs; 10, 11, and 12 has been illustrated in connection with a bolt 40 and standard nut 41. The locking device. comprises'a cup shaped washer 42, having a threaded aperture 43 eccentrically located with respect to the periphery of the washer and the inner circular surface 42* thereof. In order to prevent undue wear upon the annular surface 42 of this washer, I prefer to employ in connection with this form of the invention a wearplatetl, which is in the form. of a; sheet metal plate inderlying the nut 41 and having transversely extending bow-shaped lugs 4-1 which; engage the sides ofthenut, so that the plate will rotate therewith. The rounded surfaces of the lugs are adapted to ride upon the inner downwardly coirverging wall 42 of the avasherQ, and because of the eccentric location of the threaded aperture in the washer, the application of the nut to the bolt will result invforcing the nut transversely to the axis of the bolt, thereby setting up a pressure on the bolt which will; effectually prevent accidental removal of'the nut. In this form of the inven- 7 tion the washer ispreferably applied to the bolt before the nut is placedthereon. In each form of the invention the aperture through the; locking washer is preferably threaded to reduce the wear on the threads of-the bolt. 7 V I v I Although severalembodiments of the I ventionhave been illustrated for purposes of explaining the principle of investmentwill be; understood that mygimpmvement may be embodied in still other I forms with? out departing from thel spirit of the-invention asdefined inthe appended claims.

1," In combination, a bolt, a standard nut threadedly engaging said bolt, and athreaded washerhaving a part engaging, said nut to set up; 'a. binding frictional grip trans- V versely of said, bolt between said. nut said bolt. i

2., In combination, a bolt, anut threadedly engaging said bolt, and yaflooking washer;

seating against, the end face and the outer sides of said nut andha'ving an. eccentrically located aperture to b elosely fitted by said bolt. e V I 8.;A lockingdevice comprisinga metal plate having parts adapted to engagethe lateraLsides of a nut and having an ween-" trically located aperture adapted to bedisplaced from thelaperture; ofthenut when the nut'and washer are in, assembled relation, the aperture in said plate being of; the" samesi'ze as the apertureiinsaid nut.

4;. In combination, a bolt, a standard nut threadedly engaging said bolt, a plate seating against said nut and having parts engaging the nut to prevent relative angular movement of said nut and plate, said plate having a threaded aperture therethrough displaced from the threaded aperture of said nut When said nut and plate are in assembled relation.

5. In combination, a bolt, a standard nut threadedly engaging said bolt, and a plate having a part to engage a lateral surface of said nut, said plate being further provided with a threaded aperture adapted to engage said bolt, said aperture and said part of said plate being disposed to effect a transverse lginding action of said plate and nut on said 6. In combination, a bolt, a standard nut threadedly engaging said bolt, and a looking Washer threadedly engaging said bolt and having parts engaging the lateral sides of said nut to prevent relative transverse and angular movements of said Washer and nut, the aperture in said Washer being eccentrically located With respect to the aperture in said nut.

7. In combination, a bolt, a standard nut threadedly engaging said bolt, and a locking Washer threadedly engaging said bolt and having non-resilient flanges engaging opposite lateral faces-of said nut to prevent relative angular and transverse movements of said Washer and nut, the aperture of said Washer being eccentrically located with respect to the aperture of said nut.

8. In combination, a bolt, a standard nut threadedly engaging said bolt, and a locking Washer having parts adapted to engage the lateral sides of said nut and having an eccentrically located aperture therethrough, the Walls of said aperture in said Washer being arranged to engage opposite sides of the threaded portion of said bolt When said Washer and said nut are assembled thereon.

In testimony Whereof, I have subscribed my name.

HENRY G. ELFBORG.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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