US1494987A - Nut lock - Google Patents

Description

A. H. BOLTZ NUT LOCK Filed Dec. 23, !9?.2

Patented May 20, 1924.

UNITED TES ARTHUR H. Bo rz, or TALLMADGE, OHIO.

NUT LOCK.

Application filed December 23, 1922. Serial No. 608,730.

To all whom it may concern:

.Be it known that I, ARTHUR H. Born, a citizen of the United States, residing at Tallmadge, in the countyof Summit and State of Ohio, have invented certain new and useful Improvements in Nut Locks, of which the following is a specification, reference being had tothe accompanying drawings.

This invention relates to nut locks, and particularly" to that class of nut locks wherein a key is used to lock the nut to the bolt.

One of the objects of the present invention is to provide a nut lock of this character which is very simple and effective in use and which is so constructed that the application of a wrench to the nut automatically releases the locking engagement between the nut and bolt so as to permit the nut to be rotated, and wherein the removal of the wrench from the nut causes the" automatic locking engagement between the nut and bolt.

A- further object is to provide a device of this character which uses what is practically an ordinary bolt and an ordinary nut and requires but slight change in the nut and theabolt. a I

Other objects willappear in the course of the following description.

My invention is illustrated in the panyi'ng drawings, wherein Figure 1 is an elevation of-a nut and bolt with'my improved nut lockappl-ied thereto;

Figure2 is an end view of the'bolt and nut and the lock;

Figure 3 is a like view to Figure 2, but showing a wrench in section applied to the nut and the nut lock released from engagement with the bolt;

Figure 1 is a perspective view of the nut and bolt and nut lock; i

Referring to these drawings, it will be seen that the bolt 10 is longitudinally grooved at 11 at a plurality of points. I have shown three grooves equi-distantly spaced from accomeach other and having a depth equal to the depth of the screw-threads 12, but I do not wish to be limited to this as it is obvious that more or less grooves might .be used, Except for the factthat the bolt is grooved at 11, the bolt is of any ordinary or suitable form. The nut 13 is provided upon'one of its lateral faces with a substantially U-shaped groove 14, the legs of the U-shaped groove extending parallel to the axis of the nut and each opening at one end upon the outer end of'the nut. The transverse portion of the U- shaped groove is disposed closely adjacent U-shaped. portion of this latch or look is disposed over the transversely extending portion of the U-shaped groove 14, while the leg 16. of the wire is disposed in the arm 14: of the groove 1 1 and is held therein by an overturned portion 14 .Beyondthis leg 16 the wire vis'bent at right angles at 17 and then'formed with an inwardly projecting terminal 18 which is adapted to engage in any one of the grooves 11;

It will be seen from Figure 2 that the crossbar 19 of the U-shaped wire 15 is normally deflected outward from the face of the nut, while the arm 20 ofthe wire extends longitudinally. and-inward and normally' only bears at its outer end inthe groove 11.

Theoross bar 19 forms oneuarm, therefore,

of a crank, :the body of which consists of the portion16 of the wire, the other arm of the crank being the arm 17 V o N ow when the end of the cross bar 19 is forced inward, this crank willbe turned to carry the extremity 18 out ofthe groove '11. When pressure is relieved upon the out wardly projecting end of the transverse portion 19 of the wire, however, the resiliency of the arm 20. will cause the portion 19. to shift outward, which will carry the arm 17 inward and the terminal 18 into engagement with the groove. Thus the terminal 18 is resiliently forced toward'the bolt and will spring into a groove 11 when the terminal end- 18 comes in register withthe groove, i

responding portion of the groove 14 and force the transverse portion 19 into the corresponding portion of the groove and this will retract the terminal 18 from engagement with the bolt, thus releasing the look. It will be seen that with this construction the application of the Wrench to the nut releases thelock but that until the Wrench is applied the nut is held in its locked position upon the bolt.

WVhile I have illustrated a socket wrench A, obviously any otherwrench which will press upon the transverse portion 19 of the locking device will release the nut lock, and under some circumstances and if the wire be sufiiciently resilient, it is possible to press inward manually upon the transverse portion 19 and release the look. It will beIobvious that after the wrench is applied the nut maybe screwed on or unscrewed without any attention being paid to the lock, which will remain released from engagement with the bolt'so long as the wrench is applied to the nut.

While I have illustrated a particular embodiment of my invention, 1 do not wish to be limited thereto as it is obvious that many changes might be made in the details of construction and arrangement of parts without departingfrom the spirit of the invention as defined'in the appended claims.

[It will be seen that this nut lock is of very simple construction and that the bolt and nut and locking device can be con structed at a much less cost than with the bolt, nut and cotter pinrnow in use. At

the same time a positive lock is secured which, however, does not prevent the ready removal of the nut at any time by the application of a wrench thereto.

I claim 1. The combination with a bolt having a longitudinally extending groove, of a nut engaging thebolt, the lateral ,face' of'the nut having a groove extending parallel to theaxis of the nut, and means for locking the nut on the bolt comprising a wire having a portion disposed in the last named groove for oscillation around the axis of the portion, one end of the wire being bent at right angles and constituting a crank arm and extending over one end face of ,the nut and having a tooth to extend into the groove in the bolt, the opposite end of the wire being bent to form a crank arm extending in an approximately opposite direction from the first named arm and normally extending at a slight angle to the peripheral face of thenut, and resilient means urging said last named arm outward and the first named arm toward the bolt.

2. The'combination with a bolt having a longitudinal groove, of a nut for engagement therewith, and a locking device emextends beyond one end face of the nut and is formed to provide a crank arm with a terminal end adapted to be inserted in the groove of the bolt, the other arm of the cranked portion normally extending at an angle to other end face of the nut, this cranked portion being oscillatably mounted upon the nut, the last namedcrank arm being extended toward the face of the nut and at right angles to the crank arm and being resilient whereby to cause the second named crank arm to be forced out-- ward and the first named crank arm toward the nut.

3. The combination with a bolt having a longitudinally extending groove, of a nut engaging the bolt, the lateral faceof the" extending gradually outward from. the V lateral face of the nut and then inward and toward the end face of the nut and having the extremity of this portion engaging in one arm of said groove, inward pressure exerted upon this last named portion causing the oscillation ofsaid cranked member and the withdrawal of the terminal end of the first named arm from said groove.

4. The combination with a bolt having a longitudinally extending groove, or. a nut engaging the bolt, the lateral face of the nut having a groove extending parallel to the axis of the nut, and means for locking the nut on the bolt comprising a wire having a portion disposed in the last named groove for oscillation around the axis ofthe portion, one end of the Wire being bent at right angles and constituting a crank arm and extending over one end face of the nut and having a tooth to extend into the groove in the bolt, the opposite end of the wire being bent to form a crank arm extending in an approximately opposite direction from the first named arm the last named arm having a portion resiliently engaging a side face of the nut.

5. The combination with a bolt having a longitudinally extending groove, of a nut engaging the bolt, the lateral face of the nut having a groove extending parallel to the axis of the nut, and means for locking the nut on the bolt comprising a wire having a portion disposed in the last named groove for oscillation around the axis of the portion, one end of the wire being bent at right angles and constituting a crank arm and extending over one end face of the nut and having a tooth to extend into the groove end against a side face of the nut and in the bolt, the opposite end of the wire urging the second named arm outward and being bent to form a crank arm extending the first named arm toward the nut.

in an approximately opposite direction from In testimony whereof I hereunto aflix my 5 the first named arm, the last named arm signature.

having a portion extending at right angles thereto and resiliently hearing at its upper ARTHUR H. B OLTZ.

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