US931517A - Tie-plate. - Google Patents

Description

A, L. STANFURD.

' TIB PLTE. APPLIOATIGN FILED JAH. 28, NQS.

931,517, Patented mg. H1909.

ARTHUR L. STANFORD, 0F lCHICAGO, ILLINOIS. 7

TIE-PLATE specification .of Letters Patent.

Patented aug. .17, 1909,r

Application filed January 28, 1909. Serial No. 474,660. f v p To all whom it may concern:

Be it known that l, ARTHUR L. STANFORD, a citizen of the United States, residing at Chicago, in the county of Cook and State of lllinois, have invented certain new and useful Improvements in Tie-Plates, of which the following` is a specification.

Tic plates are frequentlyy used in the laying of railroad rails, for the purpose of protecting the wooden ties from the wear that in a greater' or less degree always accompanies the vibration and pounding of the "aile, due. to the passage of trains. lhis is especially true in cases where soft wood ties are enip oyed, which are being increasingly usedby reason of the scarcity and expense of hard wood ties in many sections of the country. Tie plates, furthermore, are of valuc. in maintaining the level and grade of the track, in reinforcing the spikes against shearing action, in maintaining the rail in its vertical position, and in reducing the cost of track labor and supervision, by reason of the increased stability and longevity of the track as a whole.

The object of tlie present invention is to provide a tie plate, so constructed that its pointed flanges, when driven into the wood of the tie7 will compress the wood displaced by the. (langes toward a central point, thereby securing uniformity of compression with a resultant rigidity in the mounting for the tic plate,'and a close compactncss of the wood between the liaiiges. l

Another object ot' the. invention is to i'einforce the tie plate on its upper side, intermediate the lower pointed l'langes, in such manne as to provide the gre test amount of strength and rigidity consistent with the use of a given amount of metal; and to provide grooves or channels which will facilitate the discharge of water, sand, or drippings from the cars. i

Another object is to so arrange the flanges and ribs that. the tie. plate can be easily rolled by ordinary rolling mill methods,

which is of vital iinportance in devices of' this kind, `which are used in great numbers and must be capable of manufacture' at a minimum cost..

Another obiect. is to so construct the bearing surfaces for the rail that the latter will be. unsupportedin its center, immediately formation,

for relieving the spikes from a shearing action.

Further objects will appear from a detailed description of the invention, which consists in the .features of construction -and I combination of and claimed.

ln the drawings, Figure l is a perspective view ofthe end of a tie plate, of the style intended for use on hard wood ties, showing a portion of the tie in section and a. portion broken away; Fig. 2 a similar View, showing the formation of the tie plate intended for use on soft wood ties; Fig. 3 a side elevation of the tie plate of Fig. l; and Fig. 4 a top or plan view of the tie-plate of either parts hereinafter described sections and edge sect-ions G. Each of the sections. on its under surface 7, is given a curvature struck on the true are of a circle, so that, when the tie plate is in use, the wood beneath the arches will be compressed toward a common center. T he curving under vsurfaces T merge into depending longitudinally extending wedge-shaped ilanges Sand 9, which are provided with flat. side faces 10; and, in the formation of the plate for use with hard. wood, ties, it is desirable that the ilanges be relatively sharp and narrow in order to more easily enter into the 'hard wood of the tie'. v

lach of the arch sections isvp'rovided, on the center of its top surfacdwith iajlongitudinally extending lat facedriblll,'which ribs are a rri nged iii staggered relation with respect to the under lianges, and serve to reinforce each of the arch sections in:` ts center and to sustain the weight of the rail. "The formation is one which provides a plurality of channels l2 intermediatethe ribs, which channels'are aiiordcd by thel juncture of theA curving upper faces 13 of the arch sections.

1, the tie plate is in the toi-m ot one or more intermediate arch The marginal walls let of the edge arch sections are of greater thickness than the intermediate walls, by reason of the fact that these portions of the tie plate as a whole are connected and supported on their inner sides only, and are therefore thickened to coinpensate for the lack of support on the other side. The center rib 1l is providedat its outer end with a shouldered lug 115, against which. the outer yedge of the rail flange is adapted to abut, and this lugl is of sufficient length to afford the necessary reinforcement for reventing the rail from spreading when subJectedto the weight of a heavy moving train. Obviously, additional ribs could be provided with such lugs, although a single lug affords ample protection under ordinary conditions. Each of the ribs, near its center and immediately beneath the rail web, is cut away to provide a recess 16 adapted to be bridged by the base of the rail, which recessserves to relievethe rail from support at its c'enter, and thereby a-lferds the necessary resiliency to prevent objectionable pounding of the rail. rl`he plate, in the embodiment shown, is provided with two spiking` holes 17, which are cut through the chan.- nels 12 and the dependent intermediate flanges 8.

The tie plate shown in Fig. f2 dii'l'ers from that previously described only in details of its shape, the saine principles ybeing involved in its construction. The arch sections are curved on a smaller radius, and the curve is struck from a point on a level with and intermediate the edges of the wedge shaped flanges. The description of the parts previously given applies equally to the construction shown in Fig. 2, so that it is not deemed necessary to describe said construction -in detail.

In use, the tie plate will be applied to the tie by driving or forcing the wedged flanges into the surface of the wood to some extent, although it is customary to rely upon the weicrht of passing trains to force the plates to their eXtreme limit of depression within the wood of the tie. As the plate isl depressed, the wood, intermediate the wedged flanges and underlying' the curved under surface of the arch sect-ions, will be com pressed towarda common center, which results`in a highly desirable uniformity of con1pression,'and serves to impart to the Wood a highilegreefof rigidity and coniactness, which tends to prei ent undue sinkmg of the tie plate into the surface of the Wood. The formation is one which strongly reinforces the plate, bot-h above and below, against any buckling strain which is most Severely felt at a point 'closely adjacent to andb outside of'the edges of the rail flanges, Which marks the limit of the direct coinpressing action "of the rail when subjected to the,weight of the train.

ln certain prior constructions there has been a tendency for the plate to bend or buckle at these points, by reason of the fact that the resistance of the wood underlying the ends of the tie plate tended to bend the plate along' the lines indicated. 'fiile forniation of the present tie plate is such that 'this difficulty is overcome, and the plate will bc uniformly depressedfrom end tol end without buckling or distortion. The arch formation is oneI which affords the greatest aniounl` of rigidity in proportion to the weight of metal employed, and at the time alfords an upper surface contour which provides for the escape of water, sand or drippings, and an under surface contour which adapts the device to engage the wood. of the tie in a most satisfactory manner. Flntherinorc, the staggered relation of upper ribs and lower flanges is one which is highly desirable in rolling the plates, in that the nictal displaced to form the arches will he forced intothe ribs, 'and the metal displaced to form the channels will be forced into the lianges, thereby facilitating the rollingr operation to a very marked degree.

Bv cutting the spiking holes through the changes, the spikes, when driven, will be supported and reinforced for a considerable distance below the surface of the tie, so that the spikes will be supported against displacement from their normal 'vertiial position under the pressure of the load carried by the rail.

What I claim as new and desire to secure by Letters i'lal'ent is:

1. A tie plate, cei'nprising a plurality of arch sections mergingpone into another, the under contour of cach of the sections having a curvature struck on the are of a circle, substantially as described.

Q, il tie plate comprisinga plurtlity of arch sections, theunder contour of each of the sections having' a continuous curvature, and each of the arch sections being provided. on its upper 'side with a longitudinally es tending rib adapted to support a rail, substantially as described.

3. A tie plate comprising a plurality of arclrsections, the unner contour of each of the sections havinga continuous curvature, and cach of thc arch sections being provide l on its upper side with a longitudinally extending rib adapted to support a rail, snide tic plate being' provided on its under side. at the points of mcrgence of the sections with a plurality-of longitudinally extending` flanges adapted to be embedded within the wood of the tie, substantially as def" scribed.

4. A tie plate, comprising' a plurality of arch sections merging into another, the under contour of cach of the sections having a curvature struck on the arc of a circle, the tie plate being provided, on its under side,

with a plurality of longitudinally extending flanges adapted to be embedded Withinthe wood of the tie, each ofy tlie arch sect-ions' being provided, Qn its upper side, with a 1 longitudinally extending rib. zdapted to suppert a rail, each of the ribs bein@ cut b away, at its center, to relieve the rml from ARTHUR L. STANFORD Witnesses:

PyERsoN lV. BANNING,

SAMUEL 7. BANNING.

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