US1606309A - Tie plate - Google Patents

Description

Patented Nov. 9, 1926.

JOHN Lunaire, or newv YORK, N1. Y.

' 'TIE PLATE.

Application 'lcd November 24, 192,5. Serai No. 71,037.

. lhe present invention. relates ments in railroad tie.-] lates.A l

Among the principal objects of.l the.` invention are toV provide a tie-plate which will effectively engage a railroad tiefand Prevent Spreading of the; track; te Provide such a platewh-ichwill not injure the fibres ofthe tie upon which it ismou-nted to pro vide such adevicewhichwill support a rail in a position normal to the coned-tread of a wheel;4 and to provide such "a device which may read-'ily be rolled endover end toV facilitate economical. manufacture. v

ith these and other objects in View, the invention resides in the novel featuresl of construction, combination and arrangement of parts hereinafter-set forth, illustrated in the accompanying. darwings and specifically pointed out in the appended claims. v

ln--my re-issuevLetters Patent No. 4,121 of. lVla-y 2, 191.6, a tie-plate isv vdisclosed wherein the krail-seat is disposed in a line norinal to the resultant of the downward force on the rail and the lateral thrust.- The bottomsurface of said tie-plate preferably has a plurality of stepped bearing surfaces which are parallel to; the rail-seat whereby to prevent outward slipping of the tie-plate on the tie. With such. a structure the tie-plate becomes embedded in the surface ofthey tie after a few train-loads have passed. over the rail which it supports and te imprevein view'o'f the, factthat. there are no pro-v nounced. kshoulders between the adjacent bearing surfaces, thel iibres of. the tie will not be injured. `VVhile the tie-plate discloesd in said re-issuey patent has very effectively met all of. the technical requirements, there has been some demand from railroad men for a tie-plate which in their opinion would take a 'more secure bite in the Y tie, especially into the prevailingv soft wood ties of today. These ties are now being almost universally creosoted to preserve their life, thus the saving of them from destruction is a very important factor in the cost of railwayfmaintenance. It is evident, therefore,'that any device` which will give great holding'powerto tie-plates, and, atl

the same time, preserve the tie'from injury, is a distinct element in railway economy.

In my U. S. Letters Patent No. 1,333,860, issued March 16, 1920, I have shown another tie-plate having a plurality of inclined bearing surfaces on its lower side and further' provided with substantial abrupt shoulders'V between the adjacent bearing sur;

faces.

The structure of the present invention is a compromise between they structuresv'of the twof above mentioned patents.-A

-Referring now to the drawings'rw'lrevrein similar Areference characters designate con showing the improved tie-plate'i-n use fior Y supporting a' Arail on a tie;

Fig.`2 isa bottom plan view of the tie,- plate, and i p Y Fig.. 3; is an. end elevationof the same looking toward. the inside edge. y

The "referencecharacter 1() designates' a railroad tie of the ordinary wood construction, upon which. is mounted my improved tie-plate 1.1 for the support of. a raill 12. The f reference character 13 designates av railroad car-wheel-having the usual confedtread, the A'taper of which vis aty the present time standardized as 1 in- 20, but which may be 1 in 40 or any other desirable ratio.

The tie-plate 11 has on its upper surface a rail-seat' lll-which is inclined downwardly toward its inner edge as clearly shown in 1, the inclination being of substantially the samedegree as the taper on the tread ofV the wheel 13. Adjacent itso-uter edge, the plateV 11 hasA an.' upwardly extending rail abutting shoulder A15 against which Athe outer edgfe of theA rail iiange maybe. poi" sitioned. I

The lower surface of the tie-plate 1.1.is formed with a plurality of'bearing surfaces 16 which are also inclined downwardly but having a greater inclination than the yrail- 9 seat 14. v

It. obviously would notdo to run these stepsl inthe opposite direction, either with a'V greater or less inclination, as thisy would tend to make the plate slip outward, except for the holding power of what is 'equivalent to ribs at the junction of the steps, and this action would tend to destroy the tie. The

adjacent bearing surfaces 16 are joined. or

merged by ogee curves 17 wherebyv to eliminatev abrupt shoulders and thus to prevent Y injury to the fibres of the tie 10. In a directionV parallel to the rail, the plate 11is cambered as clearly shown in Fio. 3, whereby to provide'a resilient seating o the plate upon the tie and any desired number of spike holes -18 may be formed` in the plate for the recepn the tie.

From the forecino' it will be evident that 3 the resultant of the downward force on the Y than in said patent.

' evenly upon the base flanges of therail, and

by thisv action the wear on the rail and on the wheel will be even so as to assure long life of such equipment. Ther plate 11 is positioned upon the tie and the'rail 12 subsequently applied thereto and held in place by spikes; 19, yandV after lseveral ltrainloads have passedover the rail 12, the bearing' surfaces 16 and their merging curves 17 become embedded in the upper surface of thel tie '10 rwithout injury to the fibres/thereof. In viewofthe fact that the'bearing surfaces 16 have a greater inclin'at-ionthan the rail-seat 14, the plate may be more securely held against outward slipping on the tie 10 than has been possible lwith the structure shownr in my previously mentioned reissue patent. Also it is to benoted that the vinclined bearing surfaces are more numerous hese features, besides taking a firmer bite in `the tie, make it possible'to roll the tie-plate stock end over end, vforming the camber in the same rolling operation,-thusl facilitating the manufacture as will be'readily apparent to those skilled in theY art. c

y Obviously changes maybe resorted to in 'the details of construction and the propor tion of parts, and the right is herein'reserved to malte such changes falling within the scope of the appended claims without departing from the spirit of the invention.

I have stated herein that my improved tie-plate may be rolled end over end. By this I mean that it may be rolled in a direction transverse to the railabutting shoulder in contradistinction kto the method of rolling my earlier tie-plates which were formed .longitudinally with respect to the railabutting shoulder. rlfhe end over end rolling may be used in forming elongated stock from which individualy plates may subsequent-ly be sheared, and as has previously been pointed out, such rolling permits the simultaneous formation of the camber.

f What I claim is:

A1. ieplate rhaving an upper surface inclined downwardly toward the inner edge, and forming a Bail-seat, and stepped bottom surfaceswhich are inclined downwardly from the upper surfact` toward the said inner edge of the plate.

2. A'tie-plate having an upper surfaceinclined downwardly toward Vthe inner edge, and forming a rail-seat, and stepped bottom surfaces vwhich are inclined downwardly from the upper surface toward the said inner edge of the plate, said plate being cambered between the two remaining edges.

A tie-plate having a rail-seat normal to theline Aof thrust of a coned-tread car wheel and which is of gradually increasing thickness from its inner edge toward its outer edge, rand stepped bottom surfaces having portions which are slightly inclined relatively to the rail-seat, said inclined porsurface forming a rail-seat, and a bottom' surfacefhaving a plurality' of inclined p0rtions of greater inclination than the railseat and extending in the same general direction, said inclined portions `being joined by merged curves. n l

6. A tieplate of the character described having under stepped projectionsparallel to the length of the rail, each stepped projection having a bearing surface Vwhich is inclinedV upwardly and outwardly toward the outer edge of the plate and with respect to the horizontal plane of the edges of said projections and which is out of parallel with the rail-bearing surface'ofthe plate, said projections being of rounded or convex form at said edges.

7.. A tie-plate of the Vcharacter described having an inclined rail-bearing surface,

"under lstepped projections parallel to the length of the rail, each stepped projection having a' bearingsurface which is inclined upwardly andA outwardly with respect to the horizontal plane ofthe Aedges of said projections andin the general direction of upward inclination of the inclined rail-bearing surface and so that itis out of parallel with the rail-bearing surface of the plate, and the plate having inner corners between the stepped portions, which inner corners are successively located nearer to the railbearing surface as the inner edge ofthe plate is approached.

8. A `tie-plate having a rail-seat normal to the line'of thrust of a coned-tread car wheel and which is of increasing thickness from its inner edge toward its outer edge` and a bottoni surface having a plurality of bearing surfaces of greater inclination than Ythe rail-seat and extending in substantially TOO plate being cambered in a direction parallel to the rail.

9. A cambered tie-plate having a rail-seat on its upper surface, means for resisting outward thrust of a rail, and a plurality of relatively wide stepped bearngsuri'aces on the lower side of the plate, said bearing surfaces being slightly inclined downwardly and inwardly away from said resisting 10 means.

lO. A tie-plate having a rail-abutting shoulder adjacent its outeredge, and provided with an upper surface inclined downwardly towardthe inneredge to form a railseat, and steppedbottom surfaces which are inclined downwardly with reference to the upper surface andy toward the said inner edge of the plate.

JOHN LUN DIE.

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