US1473753A - Joint bar - Google Patents

Description

Nov. 13, 1923. 11,473,753

. I C. D. YOUNG JOINT BAR Filed .May 25 1921 CHARLES D. YOUNG, OF PHILADELPHL JOINT Application fled Mayflii, 19,231.

To all. io/wnt it may concern Be it known that 1, CHARLES D. YOUNG, a citizen of the United vStates, residing at Philadelphia, in the county of Philadelphia and Stat of Pennsylvania, have invented certain new andv useful Improi'cments in Joint Bars. of which the following is a specification.

My inventionrelates to joint bars or fishplates for rail joints, and one or the objects is to make such joint I barsv stronger and more durable than heretofore.

Another object is to. provide an improved bar which secures allot the advantages of the so-called continuous type of bar but which is of minimum size and mass and is not characterized by certain ob ections in-' cident to standard forms of continuous bars.

Still another object of my invention is to provide an improved bar which in service is not subjected to reverse bending stresses during wheel passage over the last half of a joint.

How these and other advantages can be secured through my invention will appear from th following description of the best form of embodiment at present known to In the drawings, Fig. 1 is a side elevation o a joint having a bar embodying my invention; Fig. '2 is a plan View of Fig. 1; Fig. shows a transverse section through a rail and bar applied thereto, taken as indicated by the line 33 in 1; Fig. 4 is n. fragmentnry side view, partly in section, taken as indicated by the line 1 111 Fig.

appropriately beveled for engaging between" and with the lower and upper surfaces of the rail head 13 end base 14. As shown, the head and foot portions 11 and 12 are appropriately varied in cross section to distribute the fiber stress substantially uniigs. 1 to at comprises e of the r 5 -.test at the middle so The wide c5 ations 01 dimensions and cross-section are To such as to distr; ute the etl'ects of the load substantially uniformly throughout the of the bar, so to avoid localization of fibre stress and make such stress substantially uniform, under deflection, from end to 75 end oi the bar. This allows thebar to be made as light as possible, and thus reduces the mass andmomentuni of the whole joint when it rebounds after depression and elastic deflection of the rail by a passing wheel, and minimizes the idbration and the hammering effects.

In addition to the features described, the bar has an extension 16 of its foot portion 1 inward beneath and engaging the lower r of the bases 'll, 1 oi the meeting rail sections or long s at their junction, in the region of the ex ne lateral extension 15. its shown in z 2, this in 21rd extension 16 is relatively narrow, and has the 101111 of a triangle withits apex 1n the line or plane 01" meeting of the rail ends, close to the vertical central plane oi' the rails. About in the plane of the rail ends are transverse webs or flanges 18, 1-), 20 by means of which the web 10, the bend at the extremity oi the extended toot portion 15, and the inward extension 16 reinforced a st deformation under the asses due to the wheel load and the passage of the wheels over the rails. The upper surface of the inward extension 16, the bottom of the groove between the parts 15 and 16, and the lower surface of the part 15 are all eased or hollowed out at 22 about the outer portion V15 of the rail base 1d, to afford breathing space at this point and confine the transmission ol stresses between the rail bases and the bar to the inner portion of the base 1 In the case or" the parthe breath- 11.0

ing space extends clear across it, and is thus coextensive, transversely of the bar, with its overlap with the rail base in the middle region of the bar, as indicated at. 23 in Figs. 3, at, and 5, etc.

The purpose of this breathing space is to relieve the bars of reverse bending during additional reverse bending seriously affects the bars and rapidly produces strains and resultant breakages, particularly at the bolt holes. 3637 the provision of this breathing space, the rail end is left free to take the reverse bend without imparting a similar bend to the bar. The relative narrowness of the extension 16 lengthwise of the bareconomizes metal, and may in some cases also help to obviate undesirable stressing oi the bar. The reverse bending of the bar is thus largely, it not wholly eliminated, and its lite correspondingly increased. g

In the form of bar shown in Fig. 7 the flanges 18 reinforcing the web it) is in the plane of the meetin rail ends, but the flanges 19 and 20 of 1 andfZ are replaced by duplicate reinforcing webs or flanges 19*, 19, and 20, 20 at either side of the plane of the meeting rail-ends.

In the modification shown in Fig. 6, reinforcement of the bar web is dispensed with altogether, though the bend 21 and the inward extension 16 are reinforced with flanges 19 My bar can be made by forging or other methods and when forged, the plane of partingot dies employed is indicated by the line 25-25 in Fig. 3. lVhen the bar is thus diepressed, however, the dies are made to give the part 16 the form and position indicated in dotted lines at 16 in Fig. 3, in order that it may be possible, to remove the piece from the, dies. The part 16 is bent to its full-line position in a separate, operation after removal from the dies.

I claim:

1. A rail joint bar comprising a web with head and foot portions for engaging between the heads and the bases of the meeting rail lengths, and relatively narrow extension of the foot for engagingbeneath the base oi the rail lengths at their junction, said foot portion having a breathing space above the rail base in the middle region of the bar coextensive" with its overlap with said base transversely of the bar, and extending over. the whole of said extension.

.2. A rail joint-bar comprising a web with head and foot portions adapted to engage between and against the heads and the bases .01 the meeting rail lengths at the ends of the bar, and a relatively narrow extension on the foot for engaging beneath the bases ot the rail lengths at their junction, said foot portion having a breathing space above the rail base coextensive with its overlap with the latter, transversely ofthe bar, and extending to either side beyond said extension.

3. A rail joint bar comprising a web with head and base portions adapted to engage betweenthose of the meeting rails, the massand cross-section of the bar diminishing gradually at either side'from its middle in such wise as to make the fiber stress in service substantially uniform throughout the length of the bar, with an extension of the base of the bar beneath the bases of the rail lengths at the middle of the bar only.

4. A rail joint bar comprising a web with head and base portions adapted to engage between those of the meeting rails, the mass and cross-section of the bar diminishing gradually at either side from its middle in such wise as to make the fiber stress in service substantially uniform throughout the length of the bar. with an exmnsion of the base of the bar beneath the bases of the rail lengths,the base portion of the bar ha ving a breathing space above the rail base coextensive with its overlap with the latter, transversely of the bar, and extending over the whole of the aforesaid extension.

In testimony whereof,I have hereunto signed my name.

CHARLES o. YOUNG;

Images