US372739A - Nut-lock - Google Patents

Description

- UNrTnn STATES PATENT th rties.

JOSEPH O. BLAKNE Y,

OF BENTON, M AINE.

NUT-LOCK:

SPECIFICATION forming part of Letters Patent No. 372,739, dated November 8, 1887.

Application filed August 27, 18S7. Serial No, 245,037. (No model.)

13 To all whom it mayconcern.-

Be itknown that I, JosnrH O. BLAKNEY, of Benton, in the county of Kennebec, State of Maine, have inventeda certain new and usefuL Improvement in Nut-Locks, of which the following is a description sufficiently full, clear, and exact to enable any person skilled in the art or science to which said invention appertains to make and use the same, reference be ing had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side elevation showing my improved nut-lock in use; Fig. 2, a top plan view of the same; Fig. 3, a side elevation of the lockingbar detached, and Fig. 4 a perspective view of the washer and the plate on which it rests.

Likeletters of reference indicate corresponding parts in the different figures of the drawings.

My invention relates to that class of nut locks which are provided with means for unlocking without injury to the parts; and it consists in a novel construction and arrangement of parts, as hereinafter more fully set forth and claimed, the object being to produce a simpler, cheaper, and more efi'ect-ive device ofthis character than is now in ordinary use.

The nature and operation of the improvement will be readily understood by all conversant with such matters from the following explanation.

In the drawings, A represents the screwbolt, 13 the nut, G the washer, and D the lockingbar. The bolt and nut are of the ordinary form and construction. The washer is provided with a central hole, on, for receiving the bolt A, and with a groove, f, in its upper side for reeeivingthelocking-bar D. Thclocking bar is of suitable size to fit into the groovef when in use, and is provided at its inner end with a downwardly-projccting arm, t, which is inserted in a vertically'arranged hole, 15, formed in the washer O at theinnerend of the groovef.

Hinged to the outer end of the locking-bar, as shown at z in Fig. 2, there is a latch, is, provided with a lip or flange, 7", at its outer end, which rests in a recess, 1), in the upper side of said bar, said flange being flush with the top of the bar when it is closed to lock the nut. The washer C is also provided on its under side with a transverselyarranged downwardly-projectiug wedge-shaped flange, 3 which rests in a corresponding groove, w, in the plate or bar 13,011 which the washer rests when in use. 7

\Vhen the washer is used with the fishplate in connecting the adjacent ends of two railway-rails, the groove to is usually formed on said plate, but may be formed in a plate or bar resting on the fish-plate, if preferred.

In the use of my improvement the flange y.

of the washer O is placed in the groove 10 of the plate or bar E and the bolt A inserted in the bolt-holes m. "he locking-bar D is then placed in the groovef of the washer 0, its arm t being inserted in the hole t and the latch elevated, as shown in Fig. 3. The nut B is then turned onto the bolt, and when it comes into forcible contact with the top of the washer the latch 7c is turned down into a horizontal position, with its flange 1' resting in the recess 22, after which the nut is turned backward slightly until its corner 1) passes over said flange and strikes the shoulder d on the latch 7t, thereby looking it in a manner which will be readily obvious without a more explicit description.

\Vhenever it is necessary to remove the nut,

it is turned onto the bolt Aslightly or until its So corner 1) passes from over the flange r on the latch 7;, after which said latch is elevated, as shown in Fig. 3, thereby permitting the nut to be removed from the bolt.

' The groove 10 in the plate E and flange g on the washer prevent the washer from revolving when the nut is turned in either direction, and hence assist in preventing the accidental unscrewing of the nut from the bolt.

It will be obvious that when the nut is turned backward slightly over the flange r, resting in therecess '0, the latch k will thereby be locked in its depressed position and the shoulder d kept against the nut.

I do not confine myself to constructing the bar 1) with the recess a, as the body of said bar may be of such diameter or the groovef of such depth as to permit the corner b of the nut to pass onto said flange without said recess. Theholet may also pass entirely through the washer C, if desired, and the arm 5 of the bar D be elongated and inserted in a hole in the plateE, thus obviating the necessity of using the groove wand flangeyto prevent the washer from turning.

Having thus explained my invention, what I claim is 1. In a nut'lock of the character described, the combination of the following instrumentalities, to wit: a screw-bolt, a nut for said bolt, a washer provided with a bolt-hole near its center, a groove in its upper side, a vertically-arranged hole connected with said groove, and a flange on its lower side, a plate provided with a bolt-hole and agroove adapted to receive the flange on said'washer, and a locking-bar adapted to rest in said groove in the washer when the nut is in position on the bolt, said bar beingprovided at its inner end with an arm adapted to enter the;vertical hole in the waslier and at its outer end with 'a hinged latch adapted to be turned down against the nut and keep it from accidentally escaping from the bolt, substantially as described.

, 2. In a device .of the character described,

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