Railways: surface track – Tie arrangement
Patent
1991-07-25
1993-06-29
Huppert, Michael S.
Railways: surface track
Tie arrangement
238121, E01B 722
Patent
active
052226620
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATION
This application is a national phase of PCT/DE91/00103 filed 7 Feb. 1991 and based in turn upon a German national application P 4004 452.1 of 14 Feb. 1990 under the International Convention.
FIELD OF THE INVENTION
The invention relates to a process for the laying of at least three tracks lying closely spaced to one another.
BACKGROUND OF THE INVENTION
Tracks of the type to be described are laid at small variable distance from one another and utilized primarily at track sections adjacent to switches and crossings in the entrance regions of railroad stations. The distances i.e. distance between tracks minus gage distance; between adjacent rails of the main through-tracks and the connecting and branch tracks vary between a maximal value to the value 0. From a certain minimum distance between rails the provision of separate single ties for each track becomes impossible, since the distance from the margin is insufficient for the proper installation of the means of fastening of the rails. The ties must then be lengthened at least in the region of the adjacent connecting tracks. Since the ties also serve to assure the gage distance, a tie cannot be discontinuous between the two rails of a track without additional means of gage-holding being provided.
Up until now, this gage holding was attained so that every or every other tie extends under three adjacent tracks. The disadvantage of this solution is that very long ties are needed which require much effort in handling and furthermore that during installation of a connecting or branch track, the two main tracks must be taken out of service.
OBJECTS OF THE INVENTION
It is therefore the object of the invention to develop a railroad crossover having the ties installed so that the length of the ties can be limited to less than a maximal length of ties occurring in switches;
SUMMARY OF THE INVENTION
This task is accomplished by the method for the installation and connection of the ties according to the invention. In a single embodiment of the method, it is proposed to utilize track construction material usual in railroad operation as connecting means for the purpose of maintaining of gage distance. The method in accordance with the invention can be applied independently of the material of which the ties are made, such as concrete, steel or wood.
BRIEF DESCRIPTION OF THE DRAWING
The above and other objects, features and advantages will become more readily apparent from the following description, references being made to the accompanying drawing, in which:
FIG. 1 is a schematically shown top view upon cross ties disposed according to the invention beneath two main tracks and a connecting track running between them;
FIG. 2 is a front elevational view of the connecting track, with butt of the ties, and a connecting means for the maintenance of the gage distance; and
FIG. 3 is a top view of the connecting track, with butt of the ties, and a connecting means for the maintenance of the gage distance.
SPECIFIC DESCRIPTION
In a crossover track section 1 the connecting track 3 runs between main tracks 2 and 4 with very small variable distances 5 and 6 corresponding to a distance between an axis 12 and respective axes 20, 30 of the main tracks. Outside the track section 1 normal track ties 7 or ties 8 having a normal length continuous under two tracks can be utilized.
In track section 1, the ties 9, 10 are butted between the rails 3.1, 3.2 of the central connecting track 3, whereby consecutive butts 11 run alternating laterally with respect to axis 12 running between the rails 3.1, 3.2 and being concurrent with the axis of the connecting track. The three tracks 2, 3, 4 are mounted upon pairs of ties 9, 10 of unequal length, whereby a short tie 9.1, 10.2 always follows upon a long tie 10.1, 9.2, and a long tie 9k is coordinated to a short tie 10.k and a short tie 9.k+1 to a long tie 10.k+1, in pairs.
The stabilization of the gage dimension of track 3, between whose rails 3.1 and 3.2 every tie exhibits a butt 11, is achieved
REFERENCES:
patent: 248840 (1881-11-01), Billings
patent: 1026106 (1912-05-01), Morgan
patent: 4756476 (1988-07-01), Fasterding et al.
BWG Butzbacher Weichenbau GmbH
Dubno Herbert
Eller Jr. James T.
Huppert Michael S.
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