US786725A

US786725A - Locking-nut.

Info

Publication number: US786725A
Application number: US20981004A
Authority: US
Inventors: Andrew V Bryce
Original assignee: FREDERICK BOWERY
Current assignee: FREDERICK BOWERY
Priority date: 1904-05-25
Filing date: 1904-05-25
Publication date: 1905-04-04
Anticipated expiration: 1922-04-04

Description

PATBNTED APR. 4, 1905.

l A. V. BRYGE.

LOCKING NUT.

APPLIOATION FILED MAY 25. 1904.

2 SHEETS-SHEET l.

No. 786,725. PATBNTED 1905.

A. V. BRYGE,

LOCKING NUT.

APPLIUATION FILED MAY 25. 1904.

' l lUNrrnDV STATES vlatented April 4,' 1905.

PATENT Ormea.

ANDREW BRYCE, .OF ALLEGHENY, PENNSYLVANIA,'ASSIGNOR OF TWO- THIRDS TO MILTON BARTLEY, OF PlTTSBURG, PENNSYLVANIA, AND

FREDEEOK ,BOWER OF AVALON,

PENNSYLVANIA.

LOGKINGfNUT.

SPECIFICATION forming part of Letters Patent No. 786,725, dated April 4, 1905.

Application nea May 25.1904. sei-inno. 209,810.

To @ZZ whom it 721,601/ concern:

Beit known that I, ANDREW V. Baron, a citizen of the United States, residing at Allegheny, in the county of Allegheny and State of Pennsylvania, have invented certain new and'useiul Improvements in Locking-Nuts, of which the following'is a specification, reference being hadtherein to the accompanying drawings, forming part ot' this specilication,

1o in which- Figure l is a view in side elevation of my improved locking-nut assembled. Fig. 2 is a plan view thereof. Fig. B'is a plan view of the nut, showing the interior bushing. Fig.

A is a vertical cross-section on the line IV IV of Fig. 2. Fig. 5 is a similar view on the line V V of Fig. 2. Fig. 6 is a horizontal ysectional view on the line VI VI of Fig. 5. Fig. 7 is a perspective view, detached, ot' the 2o threaded bushing. 8 is a vertical sectional view on the line VIH VIII of Fig. 9, illustrating a modilied construction of nut and bushing having angular interior and exterior faces, respectively. Fig. 9 is a plan view' of Fig. 8. Fig. l0 is a plan view of the nut detached. Fig. 1l is a vertical sectional view on the line Xl Xl of Fig. 9. Fig. l2 is a plan view ofthe bushing. Fig. lll'is a perspective detail view of the bushing detached. Fig. 11i

3Q is a plan view of a similar bushing, omitting the longitudinal turning recesses adapted to be turned by the iiat tapered faces. Fig. 15 is a perspective view oi'l the bushing.`

My invention consists of an improvement in locking-nuts for bol-ts, &c., of the class wherein aturning-nnt is provided with aninternal-threaded bushing adapted to engage the bolt under turning action oi' the nut and to gradually tighten upon it, so as to prevent 4o itsy loosening. Heretofore in devices of this character no eiiicient means having been provided for retaining the bushing within the nut, so as to prevent separationduring shipmentor handling, no1" to'limit the inward travel of the bushing by means entirely within the nut cavity.

. My invention has for its object to provide a more eiicient device as to these features to strengthen the parts and improve their operation, together with various other details of improvement, as will be more fully hereinafter set forth. I

Referring now'to the drawings, 2 is a turning-nut, ot' any suitable outside form, in the inner cavity of which is mounted the threaded 5 5 bushing 2, having a longitudinal slot li, adapted to allow the bushing to be compressed inwardly against the bolt-threads. The nut is provided with o-ne or more inwardly-extending projections 5, extending for a portion or for` the full depth ol. the nut on its inner sides, adapted to engage corresponding inward depressions or recesses 6, formed in the upper edge of the bushing. The bushing is also provided with one or more annular projections 7 at its upper side, and these depressions and projections preferably alternate, the pro- 'jections being of the normal increased diameter of the upper edge of the bushing. The nut 2 is also provided with corresponding de- 70 pressions 8, alternately arranged between the projections 5, and when assembled the projections and depressions or' the nut andbushing respectively interlit with each other, suf* iicient clearance being provided., as shown, to allow for ample movement of the bushing, due to contraction or expansion when applied to or removed from the bolt.

For the purpose of limiting excessive inward travel of the bushing under the turning 8O operation and feed of the threads the nut is provided with an annular limiting-shoulder 9, against which the lower edge of the bushing will abut when it has been drawn down liush with the top of the nut. Additional limiting means are also. provided by the inwardly-extending' lugs 1G, formed in the inner face of the nut 2 between the vertical projecting lugs 5. rlhese shoulders l() are so locatedas to engage at 1l beneath the annular projections 90 7 of` the bushing at or about the time when the bushing is screwed down -liush with the top and are designed to come into engagement only immediately after engagement with the Vannular shoulder 9 should the bushing be 95 forced past such shoulder. A further advantage of these limiting-lugs 10 is that they positively arrest the inward travel of the bushing, and thereby relieve the nut from the lateral bursting strain due to the wedging action of the bushing as it is forced downwardly on the bolt under excessive pressure. By these means the limiting device positively checks the inward travel of the bushing when it ha reached the extreme limit of travel, so that it is impossible for the bushing to bear against the saine surface upon which the nut 2 bears.

rllhe body portion of the bushing beneath the shoulder 11 of the annular projection 7 is slightly recessed, as indicated at 19, to provide clearance of the locking projections 10, while the lower portion of the bushing is preferably brought outwardly, as at 13, beneath such depression 12 into alinement with the j slanting face of the upper portion 7, such projecting portion 13 being adapted to extend slightly beyond the inwardly-extending edges of the locking projections 10. The object of this construction is that the bushing may be pressed downwardly into the nut with sufiicient force to insert its swelled extremity beyoud the locking projections 10, the slot 1- allowing for sufficient contraction to acconciplish the insertion, while the resiliency of the bushing will cause it to spring outwardly when thus inserted, and it will be thus maintained in fixed connection with the nut. ln this position it is ready for application, and upon turning the nut motion will be imparted to the bushing by means of the intel-fitting lugs and depressions, and it will be screwed upon the bolt, tightening its grip with each revolution. The tightening effect is secured, like all devices of this type, by means of the sloping walls of the nut and bushing, respectively, and it will be observed that the upper and lower portion of the nut and. bushing, respectively, conform to the line of taper desired, while the intervening portions of both the nut and bushing conform to the other funetions already described.

The turning action of the bushing is done by engagement with the recesses 6 and projections 7 of the upper portion only. The projection 5 of the nut is preferably extended clear to the base, so that by a single operation of reaming the interior of the nut may be finished and also the faces of the projections finished in one operation.

1t will be observed that the inner faces of the projections correspond with the normal internal diameter of the nut at the bottom` and are parallel with each other, so that the operation of reaming is thus all that is required to finish these projections, avoiding the necessity of breaching these portions of the nut.

Another advantage of providing the projections 5 on the interior of the nut is that the walls are not weakened, as by the more usual construction of grooves cut into the l wall; but my construction tends to strengthen l and reinforce the nut.

In Figs. 8 to i3, inclusive, il have shown a modified construction for large-size bolts, wherein the bushing 3' is made in polygonal lform, having' angular exterior-tapered faces 7', adapted to interfit with and be engaged by corresponding angua r interiiir-tapered faces 7" of the nut 2.. Vlhe bushing is provided with external grooves or depressions f'. adupl ed to be engaged by corresponding internal projections 5 of the nut or with merely plainl sloping or tapered faces 7W, and willi either construction the bushing will be engaged und turned by the nut in the saine i'nanner ulreudjy described, As shown in the drawings, also the corners of the bushing formed by the adjacent tapered faces Z' are faced oil' from top to bottoni, providing faces 111, adapted to be engaged by corresj'ioiuling faces l5 of the nut, and it will be observed that these faces l-t und 15 are parallel with the axial center of the bolt-opening and parallel throughoiu. 'l`ho faces 15 form strengtheniiig-fillets in the rutL while these faces and the faces ilV being nontapering have no wedging action, but niorely engage each other laterally and have a rrlntive movement to each other longitiuliinilly. A special advantage in the faces i-,t is that they facilitate the manufacture of the bush ing, which l propose making of :i rolled or cast threaded blank bent around into forni, in which the thickness is uniform along the faces lll. These advantages of manufacture will more clearly appeal' in a later application cow ering the method of making tho lnlsliings. lt will be seen, therefore, that both the faces l-land l5, well as the bottoms of the grooves 6 and exterior of projections 5l, are :ill par allel with each other and with the axial conter of the bolt-opening. This is of especial advantage in assembling the nu t and bushing, facilitates their interengagcinent, und contributes to the strength of the parts and their effective action.

it will be understood that the nuty i2' is provided with inwardly-exteinling shoulders or abutments across the tapered faces, :ind thi` bushing is provided with shouldeiz--` il and recesses 1 2 underneath said shoulders, whereby the shoulders abut against said abufinenls to limit the inward travel of the bushing in the same manner as already described. lbe recesses 1Q allow the bushing to be forced down past the abutments, thus binding` the nut and bushing together to prevent disew gagement after being assembled. ln other respects the nut and bushing are similar to the form first described as to the turning und tightening operations, due to the tapered faces and the longitudinal slot, identified by tho numeral Lt'.

I n Figs. ist and 1C l show a bushing 3 merely provided with tapered flat faces 7"' and faced corners let without any other turning means, as the grooves 6', and good results may be had with this forin of bushing.. It will be understood that the shoulders ll and recesses 12 are also present and desirable, though not shown in the drawings.

The advantages of myinvention will be readily appreciated by all those accustomed to this class of devices. It is comparatively simple in constructionv and effective in operation, the loss or displacement of the different parts is entirely prevented, the excessive inward travel of the bushing is rendered impossible, and the device as a whole is very powerful'and eiective in taking and retaining a binding hold upon thebolt.

Changes and Variations may be made by the skilled mechanic in the design, proportion, and various other details without departing from the invention, the number and location of the projections and depressions may be changed at will to suit different sizes or other conditions, or the bushing may be made of a circular blank or may be-formed of a malleable casting or rolled blank provided with threads and bent up intoy circular forni; but all suoli changes and variations are to be considered as within the scope of the 'following claims.

l. A locking-nut comprising an outer unthreaded portion having interior turning projections and tapered bearing portions, and an inner threaded portion provided with annular projections at its upper edge adapted to be rotatively engagedbytlieprojections of the unthreaded portions, substantially as set forth.

2. A locking-nut comprising an outer unthreaded portion having interior turning projections and bearing portions, and an inner threaded portion provided with annular projections at its upper edge adapted to bek rotatively engaged bytl'ie projections of the unthreaded portionjand capable of being forced down iiush with thc top of the nut, substantially as set forth.

3. A locking-nut comprising an outer un-l threaded portion having interior turning projections and tapered bearing portions, and an inner threaded portion provided with annular projections and recesses at its upper edge adapted to be rotatively engaged by said turny ing projections, substantially as set forth.

4. A locking-nut comprising an outer unthreaded portion having interior turningprojections, intervening depressions and tapered bearing portions, and an inner threaded portion provided'with annular projections at its upper edge adaptedl to be rotatively engaged abutments, and a slotted inner-threaded tapered portion providerl with upper annular projections adapted to be turned thereby, and to engage said limiting-abutnients, and lower outwardly-expanding binding portions adapted to be forced past said liniiting-abutnients and to bind against them to prevent displacement, substantially as set-forth.

6. In a locking-nut, the combination of an outer unthreaded portion provided vwith vertical inwardly-extcnding turning projections, intervening tapered portions, and an annular limiting-shoulder; and an inner slotted threaded portion havingcorresponding tapered bearing portions and portions adapted to be engaged by said turning projections; said inner portions being adapted to be contracted by the outer portion to bind inwardly uponathreaded bolt and to pass down flush with the upper surface of the outer portion, substantially as set forth.

7. ln a locking-nut, the combination of an outer unthreaded portion provided with ver-k tical inwardly-extending turning projections and interior limiting-abutments; and an inner slotted threaded portion having corresponding tapered bearing portions and portions adapty 4 ed to be engaged by' said turning projections, with corresponding limiting-abutments; said inner portions being' adapted to be contracted by the outer portion to bind inwardly upon a threaded bolt and to pass down flush with the upper surface of the outer portion, substantially as set forth. l

8. A locking-nut comprising an outer untlireaded portion having' interior turning poi'- tions and tapered faces, and an inner threaded portion provided with exterior portions adapted to be engaged by the turnino` portions, and tapered faces; said outer and inner poi'- tions having interlitting surfaces extending longitudinally throughout their length parallel with the axis of the bolt-cavity, substantially as set forth.

9. A locking-nut comprising an outer iinthreaded portion having interior turning portions and tapered faces, and an inner threaded poi-,tion provided with exterior portions adapted to be engaged by the turning portions, and tapered faces; said outer and inner poi'- tions having interlitting projecting and recessed surfaces extending longitudinally throughout their length parallel with the axis of the bolt-cavity, substantially as set forth.

10. A locking-nut comprising an outer untlireaded portion having interior turning portions and tapered faces, and an inner threaded portion provided with exterior portions adapted to be engaged by the turning portions, and tapered faces; said outei' and inner portions having interfitting fiat surfaces extending` longitudinally throughout their length parallel with the axis of the bolt-cavity, substantially as set forth.

l1. An internal threaded slotted bushing IIO for a locking-nut provided with pnraliei inner and outer sides, outer tapered edging-feces, and upper rotating projections, substantially as set forth.

12. An internai threaded slotted bushing for a locking-nut provided with on ter project ing' and outer recessed. hearing-Surfaces parallei with the inner sides, outer tapered We( p;- ing-faces, and rotating' projections formed by j IO said faces., substantially ne set forth.

13. An internal threaded slotted bushing-