US1766796A - Roadbed - Google Patents

Description

' June 24, 1.930- w. MULLER ROADBED Filed April 14, 1928 a); MOQza/ma -ATTORNEY.

Patented June 24, 1930 UNITED STATES LP'ATEN T OFFICE GEORGE W. MULLER, OF W'ASHINGTON, DISTRICT COLUMBIA, ASSIGNOR T0 RAILWAY TRACK SYSTEMS, INCORPORATED, OIEYWILIMIIN GTON, DELAWARE, A COR- PORATION OF DELAWARE ROADBED Application filed April 14,

This invention relates to improvements in roadbeds, and has for its object the disposition of cross ties, beams, sills or the like, for supporting rails, baseplates or beams carrying vehicular or other traffic. More particularly, this invention has for an object the effective and additional support for railway rails where they meet. Another object is to give proper spread or bearing in and upon the ballast of the roadbed. This invention is not confined to any size or" rails, or size, material or shape of the ties, or to the character of the ballast employed.

During a number of years of observation and experience this applicant has noted that where rails or base plates are placed on ties regardless, of how they are joined together, they have the result of beating down the cross ties or other supports into the bed below, and he attributes this defect to the lack of proper bearing at certain fixed locations and the present manner of placing the cross ties, sills or beams, which it is the intention to greatly improve "for the carrying of loads above the-same by the practice of this invention.

In solving the problem of permanency and stability of railway road beds, there are factors other than reinforcing and tortitying eftects to be considered. One of the primary causes or contributors to early impairment of railways is the extreme susceptibility of the installation to vibration which results in loosening of the rail fastenings and progresses at a rapid rate coincident with the progress of the loosening action, which latter is thus initiated and continued by the vibratory motion to wiich the track is periodically subjected as by the passage of a raili'ay train. Naturally, any degree of symmetry in the arrangement or disposition of ties will have the effect of increasing susceptibility to amplifying and prolonging vibration.

It is, therefore, an object of the present invention to provide an arrangement of ties tending to reduce the vibratory motion of a track installation presenting maximum assurance against vibration and for damping such vibratory eliect as far as it is possible.

1928. Serial No. 269,935.

In the accompanying drawings illustrating this zinvention, the figure represents a top view of a roadbed having cross ties arranged in accordance with the invention.

Referring to the drawing in detail, the ties are shown as arranged in groups, one group including the regularly spaced single ties 22 which areintei'rupted at predetermined locations by interposed groups of ties including associated pairs of ties made up of the members 23 and 24 "for one pair and 25 and 26 for another pair. The number of spaced pairs of ties is not limited to two pairs. The first group of ties includes, in addition to the regularly spaced ties 22, a plurality of single ties 2'7 and 28 having between them spaces 29 less than the spacing between the other single ties 22.

The arrangement of ties above described is distinctly non-symmetrical by virtue of thedivision of the ties into two groups, one group including ties located at varying intervals and the other group of ties being arranged in pairs. Owing to this non-symmetrical tie arrangement, sympathetic vibration'is prevented and the progress of vibration along the rails in advance of a moving train is interrupted while the continuation or prolongation of vibration of the rails after passage of a train is damped. i

Although this invention is especially designed for improving railroad roadbeds, it may be applied advantageously to the building of any road for vehicular tratfic.

It is believed the above explanation sets out. fully and discloses structural means for preventing dropping or beating ties down at the rail joints; for preventing the pumping of rail joints in the track which is both dangerous and expensive; for preventing the; tics from creeping; for giving more bearing for the ties on the roadbed and ballast; for keeping the rail joints at their original level; for keeping the rail joint bars tight, and for giving a better track bed resulting in added: safety and much reduced cost of maintenance.

Having now described this invention and explained the manner of its use, I claim l A railroad roadbed including cross ties for supporting rails, certain of the ties being arranged in groups and the ties of each group being arranged at regular intervals apart, other of the ties being arranged in groups located intermediate the first mentioned groups, the ties constituting the second mentioned groups being arrangedin pairs and the ties of each pair being located in closer relation than the ties of the first mentioned group.

2. A railroad roadbed including cross ties for supporting rails, certain of the ties being arranged in groups and certain of the ties of said group being located in closer relation to one another than other of the ties in the group, other of the ties being arranged in groups located intermediate the first mentioned groups, the ties constituting the second mentioned groups being arranged in pairs and the ties of each pair being located in closer relation than the ties of the first mentioned group.

In testimony whereof I aflix my signature.

GEORGE T. MULLER.

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