US1121305A - Cast-metal railway-crossing. - Google Patents

Description

B. N. STROM.

CAST METAL RAILWAY CROSSING.

APPLICATION FILED 00117, 1.914,

Patented Dec. 15, 1914.

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B. N. STROM.

CAST METAL RAILWAY CROSSING.

APPLICATION FILED 001217, 1914.

Patented Dec. 15, 1914.

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E. N. STROM CAST METAL RAILWAY CROSSING. APPLICATION FILED 0011.17, 1914 1 ,1 21 ,305. Patented Dec. 15, 1914.

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EUGENE N. STROM, OFGHIOAGO, ILLINOIS, ASSIGNOR TO PE'ITIBONE 'MULLIKEN COMPANY, OF CHICAGO, ILLINOIS, A OORPORA'IION OF ILLINOIS.

CAST-METAL RAILWAY- CROSSING.

Specification ofLetters Patent.

Patented Dec. 15, 1914.

hpplica'tloh'flledflctdber 17, 1914. Serial N0. 867,106.

cago, in the county of Cook and State of.

Illinois, have invented a new and useful Improvement in Cast Metal Railway Crossings, of which the following is a specification.

My invention relates to the class of castmetal railway-crossings.

The tendency in crossings of the kind to which the present improvement relates is to break adjacent to the intersections of the wheel-flange grooves under the blows and stresses exerted by the wheels at these-intersections in traversing the crossing;

The primary object of my improvement is to reinforce these intersections against such breaking, especially at the angle thereof which is subject to wheel pounding most frequently in the use of the, crossing; and it is my further object to reinforceagainst cracking, in the cooling of the casting, the extensions of the crossing at the rectangular ofi'sets where the main rails of the track are fitted laterally against and spliced'to the extensions.

In the accompanying drawings, Figure 1 is a planview showing one of the four corner or intersecting portions of a rectangular cast-metal railway-crossing; Fig. 1 is a plan'section taken just below the treads in Fig. 1, and Figs. 2, 3 and 4 are enlarged sections on lines 2, 3 and 4, Fig. 1, respectively, though in Fig. 4 is shown the fish-plate for splicing the main rail to an arm of the cross. ing, omitted in Fig. 1 to avoid confusion.

Only one corner-portion of the crossing.

is shown in the drawings, to enable it to be illustrated on an adequately large scale and to avoid unnecesary multiplication of the showing. It will be understood, however, that the other three corner-portions are like. that shown, and that two may be provided as an integral casting, two of such pairs forming halves of the crossing, being united by fish-plates, which is common practice in this art.

The tread-portions 5 having the vertical side-walls 6 provided with base-flanges 7,

contain the usual wheel-flange grooves 8 thatintersect each other at the central part of the casting. The point in the intersection of the grooves 8 which is subjected to most of the pounding by the wheel-treads of trains traversing the crossing is at 8. That is to say, with a succession of trains running from left to right and the same number running from right to left, Fig. l, the point 8 and the opposite point in line with it will each receive the same number of blows, the number of wheels being-the same on each train and with the same number of trains, in the samecondition as to number of wheels,

runningi-nopposite directions in the direction at right angles to that first described, the point 8 will receive the same number of blows. Obviously, therefore, for each blow against each of the two other points, the point 8 is subjected to two blows; and thus the crossing is subjected to the greatest strains of the wheels traversing it at its four points 8, and requires there the greatest reinforcement. To thus reinforce it, I cast on the under faces of the treads 5 extendingrat right angles to each other with relation to the point 8 and intermediately of and parallel with the respective side-walls of those treads, a substantial depending rib 9 to.

bring the apex of the. angle it forms coincident with the angle at 8; and between that angle and the adjacent diagonally opposite angle of the outer diverging side-walls of the structure, I cast on the lower parts of the rib and those meeting walls a horizontal web 10. Thus, the force of the wheel-blows against the point 8' is taken and distributed through the medium of the rib 9 and the diagonal web 10 over the adjacent arts of the crossing-structure, thereby shie ding it against fracture at the grooved portion thereof adjacent to the aforesaid point.

To reinforce the structure along each of its four divergent arms, I cast horizontal webs 11 on the opposite side-walls 6 alon the bases of those arms of the crossing, an vertical webs ll at intervals connecting the horizontal webs withrthe bottom face of the tread; These horizontal webs might be continuous alongthe base of each arm, were it not for the necessity of discharging the core-sand used in casting,for efiecting which discharge,openings 12 are provided between the webs 11. These webs 11 and 11 take the strains exerted by the wheel-flan es against the sides of the grooves ,8 and 'stribute them over the structure, thus shieldlike the rail shown at 14: in Figs. 1 and 4:, are spliced, each by a fish-plate (Fig. 4), to an arm of the crossing. At these points, or angles, which are formed by rectangular offsets in the arms, the casting tends, in cooling, to crack in a diagonal direction. To there reinforce it, I cast on the under sides of. the tread-portions of those arms, ribs 9 which are shown as and may be continuations of the rib 9, though in that case the sections 9 should be oifset at 9* and again at 9 to extend along the inner sides of the webs of the main rails 14 and fit against the latter and between their heads and base-flanges, as will be clear from the representation in Fig. 4:. Reinforcing webs l1 connect the lower parts of the ribs 9 with the adjacent vertical walls 6 of the divergent arms at intervals, but the vertical webs 11 are omitted, as being unnecessary, along the ribs 9*.

What I claim as new and desire to secure by LettersPatent is:-

1. A hollow cast-metal railway-crossing having divergent arms forming treads provided with intersecting wheel-flange grooves and side-walls, an angular reinforcing rib on the under faces of the treads of adjacent diverging arms of the structure located between the vertical walls, having its angle 00- incident with that formed by the intersecting wheel-flange grooves, and a web connecting said rib and the vertical walls at said angles.

2. A hollow cast-metal railway-crossing having divergent arms forming treads provided with intersecting wheel-flange grooves rib and walls at said angle.

3. A hollow cast-metal railway-crossing having divergent arms provided with rectangular ofisets at which to splice main rails, ribs cast on the under faces of the tread-portions of the offset-sections of said arms and extending across said offsets, and horizontal webs cast integral with and connecting said ribs and the adjacent vertical walls of said arms at intervals.

4. A hollow cast-metal railway-crossing having divergent arms forming treads provided with intersecting wheel-flange grooves and side-walls, and provided with rectangular offsets at which to splice main rails, an angular reinforcing rib cast on the under faces of the treads of adjacent arms, extending across said offsets and provided with offsets in the extended sections, said rib having its angle coincident with that formed by the meeting of said walls, a web connecting said rib and walls at their adjacent said anglee, and webs cast integral with and extending at intervals along said rib and the bottom of said arms.

EUGENE N. STROM.

In presence ofg E. D. STEELE, O. C. AvIsUs.

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