US1694313A - Railway roadbed - Google Patents

Description

RAILWAY ROHDBED Filed March 22, 1928 .m. mm A M; j

Patented Dec. 4, 19.28.

VVILLl'ATsfE DALTON, OF GLEIJVILLE, NEN YORK.

RAILVIAY BOADBED.

Application filed March 22, 1928. Serial No. 283,753.

The present invention relates to railway roadbeds and especially to railway roadbeds formed from concrete.

One object of my invention is to provide an improved concrete roadbed wherein pro- *isions are made for draining away water so as to prevent accumulations of moisture and frost beneath the rails, a thing which tends to destroy the insulation which is required beneath the rails to insulate them from'the roadbed.

A further object of my invention is to provide an improved construction ans. arrangement whereby the rails may be attached readily to the roadbed and especially a construction and arrangement whereby they may be attached to the roadbed after the manner disclosed in my Patent No. 1,657,242, patented January 24:, 1928.

Other objects of my invention and the advantages thereof will be pointed out hereinafter, and for a consideration of what I be lieve to be novel and my invention, attention is directed to the following description and the claims appended thereto.

In the drawing, Fig. 1 is a perspective view, partly in section, of a railway roadbed embodying my invention, track rails being shown mounted thereon; Fig. 2 is a transverse sectional view, and Fig. 3 is a detail sectional view of a modification.

Referring to the drawing, 1 indicates generally a concrete roadbed for a railway track and 2 and 8 indicate the track rails.

According to the embodiment of my invention illustrated, l construct the concrete roadbed so that its top surface 4 slopes downwardly away from'each side of each rail. This forms in substance ridges 5 at the two sides of the roadbed upon which the rails rest. I then provide in the roadbed at suitably spaced intervals transversely-extending drainage grooves 6 which extend throughout the width of the roadbed and into which water falling on the roadbed runs and from which the water is discharged at the two ends of the groove, and I render the ridges 5 for the track rails continuous by means of metal plates 7 which are suitably fastened in the concrete and are utilized as parts to which the track rails are fastened. Metal plates 7 are set into the concrete flush with the top surface of the roadbed and for anchoring them in position I utilize preferably U-shaped anchor rods 8 which are embedded in the concrete with their ends projecting through openings in plates 7, the ends being welded to the plates'as is indicated at 9. lVelding of the anchor rods to the plates has the advantage that an integral connection is formed which is not likely to work loose as is the case with threaded connections.

The depressions 10 in which metal plates 7 i are set may be formed in the concrete at the time the concrete is poured by means of wooden patterns, the patterns having holes clamping members 12 and the spring key fasteners 13. As more fully explained in my above-referred to patent, the spring key fasteners serve to hold the clamping members in position. As will be seen from Fig. 2, the drainage grooves 6 serve to receive the lower ends of the rail-fastening means. Preferably the fasteners at the outside of the rails are made wider than are those at the insides of the rails and grooves 6 may be made wider at these points as is indicated at 14 to accommodate the wider fasteners. Beneath the rails are insulating members 15 which may be in the form of continuous strips of rubber or other suitable insulating compound or material. By making the strips 15 continuous they provide a continuous support for the rails so that the rails do not at any place rest directly on the concrete. This arrangement is desirable because the surface of concrete is more or less irregular and does not form a good surface for direct. engagement with a rail. On the other hand, a continuousstrip, especially when formed from rubber, provides a good support for the rail and serves to take care of irregularities in the concrete surface. Also, beneath the upper inturned ends of fasteners 12 are insulating members 16 which may be moulded from suitable material and which are provided with side flanges .17 for retaining the members 1.6 in

place.

Instead of this arrangement, I may form the fastening members 12 themselves of insulating material. This is] illustrated in 1 ig. 3 where 18 indicates a fastening member so formed. rail and as will be noted the fastening means is spaced. from them and does not in any way interfere with this standard track construction.

By my invention I provide an arrangement ofconcrete-roadbed which can be readily constructed and which when in use will- -plates to the concrete ro-adbed, the top surfunction to prevent moisture from accumulating undertherails, a thing which may result in the insulation being destroyed. The transverse grooves 6 perform two functions,-they serve to carry away water falling in the roadway and they serve asrecesses to receive thelower ends of the rail-fasten ing means; Likewise, the plates 7 perform two functions in that they serve :to render the-ridges 5 for the track rails continuous and. to provide members to which the-rails may be anchoredreadily by an approved form ofrail-fastening means. The arrangement of the transverse grooves 6 brid 'ed by the tie plates-". which receive the rail-fastening means, I feature of my invention as it enables me to use with a concrete roadbed a type of railfastening means adapted also for use in fastening railsto metal ties such-:as those illustrated-in my patent referred-to herein. In accordance with the provisions of the patent statutes,'I have described theprinciple ofoperation of my invention, together with the apparatus which I now consider to represent the 1 best embodiment thereof, but

19 indicates the splice bars for a regard as being an important I desire to have it understood that the apparatus shown is only iiiustrative and that the invention may be carried out by other means.

What I claim as new and desire to secure by Letters Patent of the United States, is

1. A; railway roadbed formed from concrete, said roadbed having ridges for supporting track rails and being provided with spaced transverse grooves, tie plates which span said grooves to render the ridges con tinuous, and means for anchoring the-tie face of the roadbed beingsloping to drain water away from theridges,

2. In a railway track structure, the cont bmation of acontmuous concrete roadbed having rail supporting ridges and transverse ly-extending grooves, the top surface of the roadbed sloping downwardly from said ridges, tie plates anchored to the roadbed-and serving to render said ridges continuous, track rails supported on saidridges, means fastening the track rails to said tie plates, and means for insuiating the rails from the roadbed and from-the fastening means.

3. In a railway track structure, the com bination of a concrete roadbed having spaced, transverselyextending drainage grooves, tie plates which span said grooves, rods anchored in the concreteandwelded'to said tie plates for holding the tie plates in position, track-rails supported on said tie plates, and means which project into said grooves for fastening the rails to the tie plates;

In witness whereof, I have hereunto my hand this19 day of March, 1928.

WILLIAM DALTON.

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