US899293A - Sound-deadening construction for elevated railways. - Google Patents

Description

` Middlesex UNITED SrlATlllilS 1;)ATENT OFFICE.

CHARLES HOWARD rgronovl'on, or omissions, AND nfijLLiAii D; MURPHY, oF NEWTON,

.MAssAcHUsnfrTs SOUND-DEADENING CONSTRUCTION son ELEvAmD namwnis Patented Sept. 22, 1908 Application filed September 23, 1907. Serial No. 394,052.

To all whom it 'may concern:

Be it known that we, (IH'AnLns HOWARD CoNovnn, ol' Cambridge, and WILLIAM l). MURPHY, of Newton, both in the county oi and State oll Massachusetts, have invented certain new and useful improvements in Sound-Deadening Construction for Elevated Railways, of which the following is a s ecifcation.

vvhe object of this invention is to materially lessen the noise caused by the runningi of railroad cars and trains, particularly on elevated railways. This desired end we accom plish by interrupting the continuity ot vibration between the rails and they tics or stringers on whichtheyrest in the ordinary construction. We largely prevent the transmission of vibration from thek rails to the supporting structure by interposing between the partsanon-vibrating element adapted to the severe requirements the rails being *held rmly in position thereon,

The main feature of our improvement and the preferred constructim'i is hereinafter de-A scribed and claimed., and is illustrated in the accompanying drawings, in which,"

Figure 1 is a transverse vertical section,1 about full size. Fig. 2 is a longitudinal scction, on line 2-2 of Fig. l, taken on a reduced scale.

The characteristic feature of our invention is the continuous non-vibrating clement or layer 7 introduced between the }.nactically rigid parts of therstructure, as between the base of the rail 8 and its immediate supports. This layer is preferably of firm rubber packing formed of alternate folds of heavy duck and rubber vulcanized together, asin rubber belting.

Another novel fcaturecf our inventimi is a continuous metallic support .l0 for the non vibratin f laver T, bom extending the mi! length o the rail. .ln the drawing such eup-v polt is shown as a broad and sha1 ow l0, its marginal walls giving cflicicnt lateral support to the body of the packing which ex.- tends thc full width of the trough and may be vulcanized in place.

The packing should be of the best quality and practically unyielding under the weight of the car or train, since it rises but above the edge Walls of the trough trough f dispense with .fisbrplates i i i i l i 1 i along rail base should. not come in contact with the Walls. They may even be omltted where the service is not too severe.

under the strains of use secured n1 any'elhclent manner, as by lag screws, bolts or spikes 11, and Will have any.

required lateral from spreading. l

The intimate Contact of the non-vibratin packing wi th the rigid parts between Whic l supports to prevent them it is held. checks the vibrations of cach and prevents the direct transmission of such vibrations from one to the other. The'clinging nature of the packing also tends to resist lengthwise movement' of the rail. The trough forms a continuous metallic support for the packing beneath the rail, bridging over the spaces between the ties. (See Fic, 2.)

Ve disclaim .the construction shown in v,Tinted States Patent to Josiah Foster,- granted March 20, 1877, No. 188,617, and therein said to Lconsist in constructing the rail with a central groove upon the under side of its base, extending its whole length, and. in combining with such a supplementary rail of\a length equal to ordinary rails, having a central iin or rib tovcorrespond with the groove in the main rail. Between these two rail's an elastic acking may beuscd, and wheneverso used t 1e shoe or supplementaryrail may havev side-flanges embracing the sides of the base of the Ina-in rail.

The purpose ol that construction was to It wasl not de# of trains, and each edge and signed to i'ireven t the noise would not do so, because at be in actual contact and the vibrations of one directly transmitted to 4the other, accompanied by noises due to their rictional move nicht. j Y .Y

ln our im `rovcd construction the rail has the usual 'un tomv between its flanges,

is correspondingly flat and continuous,

andy the vnon-vibrating -slightly layer extends from, edge to edge, preventing and. `the metallic Contact. v

an intermediate linesuch rails wouldroken, flat base, the trough boi:-

We claim as our joint invention: 1. In elevated railway construction, a continuous non-vibrating layer interposed longitudinally between the base of the rail and its immediate sup orts, and exten dine unbrokenly the fu width of the rail and from end to end thereof, substantially as set forth.

2. In railway construction, the combination of the rails, a flat-bottomed, longitudi-v nal metallic support beneath each rail, 4extending fromend to end and ed eto edge thereof, and a non-vibrating pac ing layer of corresponding dimensions interposed between sald rail and supportand in continuous contact with both, substantially as set forth.

3. In railway construction, the combina tionV of the rails, a flat-bottomed, longitudinal, metallic, flanged support beneath eachrail, extending from end to end and from edge to edge thereof, and a non-vibrating packing laver of corresponding dimensions interposed between said rail and support and in continuous contact with both, and lying between the flanges of said support, substantially as set forth.

4. In elevated railway construction, the combination ofthe rail, a continuous longi tudinal support beneath the rail, serving to bridge over the spaces between successive ties, and a non-vibrating layer interposed be tween and in contact with said support and 1 rail, the rail base and its support and said interposed layer having continuous, unbroken 'contacting surfaces from edge to edge, preventing metallic contact, substantially as set forth.

5. In elevated railway construction, longitudinal metallic troughs sunken in recesses in the ties, and non-vibrating packing layers filling said troughs and extending higherthan the walls thereof, in combination with the rail ada ted to rest by its base on said packing, an with suitable rail fastenings, substantially as and for the purpose set forth.

6. In elevated railway construction, the composite support for the rail, comprising a longltudinal metallic trou h having between its flanges a continuousv at up er surface,

and a continuous la ver of non-vi rating ma terial as packing, fi ling said trough and securely held therein, substantialy as set forth. l

In testimony whereof we have affixed our signatureain presence of two witnesses.

CHARLES HOWARD COOVER. WILLIAM Il. MURPHY. Witnesses: A. H. SPENCER.,

ARTHUR P. HARDY.

Images