US933534A - Rail-joint. - Google Patents

Description

J. DESPOSITO.

. RAIL JOINT. APPLIGAI'ION rI E n Mum, 1soa.

Patented Sept. 7, 1909.

' WITNESSES I UNITED STATES-@ATENT oriucn.

a JOSHUA :nnsrosr'rp, or PITTSBURG, PENNSYLVANTA.

gag a azeme t l j v V ltilmOWItihfit I, Josnui DEsroslro, a

ergen of Pittsburg,

'fgh'e'ny and Stateof Pennsylvania, herein: vented a new and :useful Improvement in Bait-J int scrip io fthereof;

s PI PQ-t iliv the meeting ends of the rails are not located over a tie.

bars used for suspended. joints of -T he object e f-my invention is toriproyi'de ,a simple, strong and efiicient form eta-joint structure which will support the rail ends,

as well as one whichfwill possess the same, or nearly the same propertiesas to stillness, load carry ng capacity and deflection as the rails to be joined, with the least expenditure of metal, and without departing from the i generally adopted type .ofsuch structures.

My invention consists,- generally stated;

in the novel arrangement, construction and combination of parts, as hereinafter more specificallysetforth and described and par- ;.1ticularly pointed outin the claims.

'lo enable othersgskilled in th'e art to which my. invention appertains to construct and-'ilselmy improved -raihjoint, I will describe the 'samemore fully. i referring to the accompanying1 drawing, in which :--o

Figure .1 isa side elevation showing a' portion ofa railway-track provided with my improved. angle or. splice bar. Fig. 2. is a yertical cross-section of the joint. Figs. 3

end '4: are similar sections of other forms of e-join Ljkeisymbols of reference herein indicate likepartsin'e'ach of the figures of the dran 1n V Q1Eks.gillu's'trated in the drawing and referring to Figs. 1 and 2, in which isshown the preferred form,- 1-1 represent the meeting ends of the rails A and 22 the ties on each side of the rail-joint.

The angle-bars on opposite sides of the rail-joint are similar in character and'each consists of an upper vertically-extending portion'3 having a head 4 thereon for fitting under the jinclined'under surface a of the rail-head ti-bygits upper inclined face i and this portion merges into the intermediate and sloping portion 5,. whichjfits on the base,

or flange Z) of the rail; "The portion 5-is I 'hp ilicationhfiletl March 7 1908.

in the county. of Alic and Lido herehydeclarethe. follow ng to he e full clear, and exact de-,

P11131011 relates to railljo'ints andeci al reference. 'to theangle, fish or y -rails,', such as the joints in which RAIL-Joint. 1 I

" Specification of Letters Patent. Patented 7,- 1909- Serial No. 419,788..

projected outwardly and downwardly at an incllne ata point beyond theed'geof the rail flange toform the dependin outwardly inclined portion 6, and it wil 'be'noted that by theposition or direction of said portion 6 .the principal axis of bending moment remains wholly within the body of the angle bar, .as shown by. the axial line cd, while the "horizontal neutral axis is shown by the axial line ef. The axes of bending moment in the angle bars are arranged at an inclination to the vertical axis of the rail andare at a downwardly extending angle between 30 and 35 degrees, or at substantially an angle offilidegrees to said V81; tical axis. It is considered that an axis passingthrough the lower end of the flange on the bar or through the center of the enlargement on said end, and through the cenof the rail through filling in and rounding the angle in the outeroface of the bar; as at the bar as nearly as possible in a straight line throughout the same and along said axis. In the use of these angle bars, the portions 8, 4 and 5 of the same are extended longitudinall over the ties at the ends of the joint and the depending outwardly inclined portion 6 is cut away at the ends in order to fit down between the ties and be free to spring under the strains incident thereto. In the connecting up of these angle bars to the rails such bars are secured in place by the bolts 7 passing through the same and rail ends in the ordinary manner and at the usual height in the rails, and the free flanges or portions 6 will project below the base ot therail.

It will thus be obviousthat in the use of my "improved angle bar the metal is so distribut'ed as to form'a shape having a cross section. in which thef axis passing through thecen'ter m": gravity:of'thesection will remain Wampum o; t1iefsm11 and on account of such an arrangement the stresses 5", as well as by disposing all'the metal of set up in the shape and under loading such as is obtained in the bar in actual service, will be transmitted throughout the body of the bar for its entire length, and as they act normally to such axis, they will not create a buckling tendency in such shape. It will also be obvious that the principal axes of bending moment passing through the center of gravity of the bars being nearly normal or perpendicular to the inclined under faces of the rail head will better support suchhead, and there will not be a. tendency of the tops of the bars to open up and slide away from the head of the rail, as is the case with the ordinary approved constructions of these bars, but such barswill have a tendency to be forced inwardly thereby. It will also be noted that by locating. the portion of thebar between the head and base of the rail away from the web of the rail a greater proportion of metal can be provided at the head of the bar, and so thereby take better care of the reverse bending moments set up in the barunder various locations of the loads. All these advantages are obtained by abar having a depending flange located between the ties, extending below the level of the base of the rail and bent outwardly, so as to be in the same general direction with the bar, and to contain a line passing through the center of gravity of "the bar, such line being at the same time contained for its entire length by the outline of the section, and to be normal or nearly normal to the under side of the railhead.

If desired, the depending flange 6 can terminate in a bulb or'similar enlarged or increasedshape, as shown at 6, "and such an. arrangement will increase the stiffness at a small expenditure, willequalize the amount of metal above and below the neutral axis, as indicated in Fig. 2, and thereby equalize fiber stresses in top and bottom fibers, or in other words, give a uniform section modulus or amount of resistance. I

In Figs. 8 and 4:, the depending flange 6 is shown as being somewhat lengthened over that shown in Figs. 1 and 2, and thereby dispenses with the abrupt shoulder 6 shown in the latter-and on the outer surface of the bar between the sloping portion 5 and said flange for the holding ofthe spike head, while if desired the connecting bolts 7' can be placed in a lower position than the usual one, as shown in said Fig. 4. Various other changes in the form and arrangement of the a'ngle'bar and flange, as well as in the connecting parts may be resorted to without departing from the spirit of the invention or sacrificing any of its advantages.

WVhat I claim as my invention, and desire to secure by Letters Patent, is

1. A splice bar for rails having the'axis of bending moment wholly within the bar and passing through the center of gravity and the upper end and lower extremity of.

the bar.

2. A splice bar for rails having the axis of bending moment wholly within the bar and passing through the center of gravity and the upper and lower ends of said bar, and a dependingiflange on said bar extending belowthe base of the rail and in the same general direction as the axis of said bar.

splice bar for rails having the axis of bending moment wholly within the bar and passing through the center of gravity and the upper and lower ends of the bar, a depending flange on said bar extending below the base of the rail and in the same gem eral direction as the axis of said bar, and an enlarged portion at the termination of said flange.

4. A splice bar for rails having the axis of bending moment wholly within the bar and passing through the center of gravity and the upper supporting face and the lower extremity of the bar, and a depending flange on said bar below the base of the rail and 1n Elie same general direction as the axis of the ar. A splice bar for rails having the principal axis of bending moment wholly within the bar and passing through the center of gravity and the upper end and lower extremity of the bar. 6. A splice bar for rails having the principal axis of bending moment wholly within the bar and passing through the; center of gravity and the u per and lower ends of the bar, and a depenc ing flange on said bar excipal axis of bending moment wholly wlthin the bar and passlng through the center of gravity and the upper and lower ends of said bar, a. depending flange on said bar be low the base of the rail and in the same general direction-"as the principal axis of the bar, and an enlarged portion at the termination of said flange.-

8. A splice bar for rails having a dependin g flange below the base of the rail terminating in an enlarged portion, said bar having the axes of bending moments passin through .the body of said depending flange, through the center bf gravity of the bar as whole,

and .through its upper end and being wholly within the'bar.

In testimony whereof, I, the said JOSHUA DEsrosrro', have hereunto set my hand.

J OSHUA DESPOSITO. WVitne'sses:

J. N. Cooxn, JAMES L. ,WEHN.

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