US1383858A - Bumping-post - Google Patents

Description

A. ROBERTSON.

BUMPING POST.

APPLICATION FILED JUNE 23, 1917.

Patented July 5, 1921 2 SHEETS-SHEET I.

A. ROBERTSON.

BUMPING POST.

APPLICATION FILED JUNE 23, 1917. Patented July 5., 1921.

2 SHEETS-SHEET 2 AL X NDE mmsommmmm CITY, Ass1 noar a-a1vmmcm amma:

I {a licationfiledqunees, 1917;: gseriei-no. 176,456. l

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'Beit known that IQA'LEXANDER RO ERT- SON, a citizen of the United State's and resident of Granite City, in the'countyrof Madison and State of I1linois,' have .invented certain new and useful Improvements in Bumping-Posts, of which the following is a specification.

My present invention relates to improvements in bumpers and similar devices for use on railroads.

The principal objects of my present invention are to provide means for more gradually retarding the momentum of a car or train of cars than can be accomplished by the bumpers or buffers heretofore ordinarily arranged at the terminals of railway tracks, to provideimproved means for preliminary retarding of the cars before they receive their final check, to provide improved means for supporting the bumpers,

to provide improved means for connecting the bumpers to the track, and generally to improve, simplify and cheapen the construction of railroad bumpers.

In attaining these and other objects and advantages to be hereinafter set forth I have provided a construction two embodiments of which are illustrated in the accompanying drawings, in which:

Figure 1 is a side elevation of bumping device. constructed in accordance with my present invention;

Fig. 2 is a plan view of the same;

Fig. 3 is a section on the line 33 of Fig. 1;

Fig. 4 is a section on the line 44 of Fig. 1; and I Fig. 5 is a section of a modified form of construction.

The bumping device illustrated in the drawings comprises a series of bumpers 10 mounted on the track. At one end of the series is a bumper 11 of greater height. than the others designed to bring the car to a final stop if the car has not been stopped previously. The bumpers are mounted on inclined portions 12 of the track rails. The track is upwardly inclined at this point to aid the bum ers in checking the movement of the cars. The bumpers 10, shown in Figs. 1 to 4 are formed with upper tread surfaces 13 comprising a central fiat portion 17 and two downwardly inclined segmental portionsql8 These segmentalportions are preferably formed so that the adjacent: portions :18 of two adjoining bumpers form a part of lPatenteil thev same circle. The trea'd surfaces 13 are providedon their innenside-wi'th flanges 14:.

The flanges 15 of the car wheel's rest on the tread surfaces 13 and are kept in position laterally by the flanges 14:. In the form of construction shown in Fig. 5 the tread portion of the wheel rests on the tread surface 13 of the bumper and the flange engages the inner side of the bumper as it does the inner side of the track rail under normal conditions.

The form of construction shown in Figs. 1 to 4 is preferable under certain conditions.- For example the upper portions 17 are apt to catch the brake shoes unless the tread surface of the car wheel is raised above the tread A surface of the bumpers by the height of the wheel flange 15.

The bumpers are formed with downwardly projecting portions 19 having slots therein of substantially the same contour, as the head and web of the rail so that the bumpers can be slid along the rail longitudinally. The portions 19 are arranged to rest on the flange of the rail and so support the bumper laterally and prevent tilting.

Longitudinal movement of the bumpers under buffing strains is prevented by bolts 20 passed through the web of the track rail at each end of the series of bumpers and also by the spikes 21 which are driven close against one side of the projections'19.

By mounting the bumpers on the rails there is little danger of the bumpers being torn loose from the track by the bufiing strains which are transmitted directly to the track itself. In this connection it will also be observed that each section of the bumper is slightly spaced away from the adjacent sections so that the bufling strains on each section are not transmitted to adjacent sections. This greatly reduces the chances that the spikes 21 or bolts 20 will be sheared ofl".

Having thus described my invention and illustrated its use, what I claim as new and desire to secure by Letters Patent is:

tread surfaces, said projections extending above said track to a substantially uniform height. i

'2. The combination with the track of a bumper comprising a member having a lower surface adapted to rest on the track rail head and having an upper treadsurface comprising a series of undulating portions' 3; The combination With the track of a bumper mounted thereon and having a s e' ries of undulating tread surface portions for engagement With the tread portion-0f a car Wheel. v e. The combination with the track of a series of bumpers mounted upon the said track'and spaced apart from each other,

preventing movement of each bumper relatively to the track, whereby buifing strains on one bumper are not transmittedto the others.

Signed at Sharon, Pa., this 21st day of May, 1919.

.Witnesses:

ALBERT H. SAU'ER, A. 0. JAMES.

ALEXANDER'ROBERT'SON. a

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