US1458945A - Reenforced-concrete railroad tie - Google Patents

Description

June 19, 1923.

J. KRUTTSCHNITT REENFORCED CON CRETE} RAILROAD TIE Original Filed Sp'b. 29, 1920 2 Sheet-Sheet 1 1110111111111/11/111111111, gz ggimvmuvo w INVENTOR ATTORNEYS June 19, 1923., 1,458,945 v J. KRUTTSCHNITT REENFORCED CONCRETE RAILROAD TIE:

Original Filed Sept. 29. 1920 2 Shets-Sheet 2 ATTORNEYS Patented June 19, 1923. I 1' U KRUTT HNI I, O EW NimN ommensu REENFOBGED CONCRETE RAILROAD 'Application filed September 29, 1920, Serial No.. 413,610. Renewed May 4, 1923.

Toall whomitmqy-concern;y v i B it known th t I, J U US KR T I T, a citizen of the UnitedStates, residing at New Canaan, county of Fairfield, State of Connecticut, have invented new and useful mpro e n n -Renfor. ed-Gon rete Bailroad Ties, of which the following is a speci fication, reference'being had to the accompanyi g awi gs, W Ch'f' Fig- 1 Lean el vation of my i proved tie p rtly in se ion; ig. 2 is a parti l pla he eof,- also partlyin sectionyl ig 3 is a perspective partially brokenaway to show the arrangement of the reinf rcing bars; Figs. st and 5, are sections respectively on Figs. 6- and 'Z, are sectionsrespectively on lines VI?V,L and VIITVII of-Figs 1.

My invention relatesto railroad-ties and comprises a reenforced concrete t1e having therein cushioning blocks to which thetie P ates and iai s are attached, and the scour-1 ing means for which also. act to retain the blocks in position in the tie. My improved tie is so designed that thereinforcing'bars are arranged to. give it. the necessary strength, to prevent the cracking :of the con.-

crate/when the blocks are driven in and to a give it a broad bearing surface and afford a large area to prevent shifting,and recesses or panels 3. in the sides thereof into Winch the ballast is tamped,'and which anchor the tie particularly against endwise movement on curves. The rails are connected to the ties A through the wedge-shaped rail blocks 4, which are preferably made of creosoted' wood. The blocks of each pair meet in the long axis of the tie and are seated in a pocket or recess 5 of double wedge shape in the top of the tie. Each recess 5 also has undercut sides 6, so as to hold the wooden blocks 4 from vertical movement relative to the tie, so that side walls 6 of each recess are tapered both vertically and horizontally.

The rails B are secured to the ties by means of tie plates 7 spiked or otherwise fastened to the wooden blocks, and the wooden blocks 4' are held from outward movement along the axis of the rail by spikes 8 driven through apertures in the tie'plates 7. It will thus be i seen that each tie plate 7.-holds-in position by its spikes the pair of blocks upon which it is The tie is reenforced by the bars 10', 11,- 12,

'13, 14 and 15, all'ofwhich, with the except.- tlon of the bars 15, extend for substantially the length/of the tie. Each bar lies *ina separate vertical plane, except where the barsjll and 13 pass each other in the region f the recess 5;, amdtheends of thebars' l'l and 13, and 10 and 12, areturned to overlap,

each other in the ends ofathe ties, and eiicept that the ends of thebars 14 are turned into a horizontal plane' The-ends of thebars 10, 11, 12 and 13' are turned upwardly or down.- wardly substantially into a vertical plane; The bars 11, are bent in the form ofa truss support immediately under the -.recesses"5.,"=

while the bars lO-and 113 are bent to'rein force the corners of therail seats to prevent splitting of the concrete at these points, and

also to aid intaking care of diagonal tensilestresses. The bars 15Qwhichextend under the recesses'5 and a shortrdistance either,

side thereof,v serve to resist the tensile stresses developed in the bottom of the tie lmmediately under the recesses 5.

The longitudinal barslO, 11, 12,13, 14

and 15 are bound together by tie rods 16, which not only serve to locate and anchor the bars in theconcretc but also to'prevent shearing stresses. 1 Ties constructed in accordance with my invention have the. following advantages:

Fewer tiesare required than where-wooden ties are used, owingto the greaterand more unyielding bearing area provided," which also results in employing a' smaller number of track fasteners; the wooden blocks'i, which are driven and held in the accurately located recesses, make the-gauge easy to maintain; the wooden blocks are of a size sufficient to afford ample insulation where electrical insulation isrequired; the blocks,

act to cushion the'rails and thus lessenthe noise and vibration and add to the comfort of travel; and bolts or other fastenings between tie and'wood blocks are unnecessary and replacement'of the blocks may therefore be readily made. a

In the section of the tie between the rails, the bars 10, 11, 12 and 13 are located as near the surface of the tie as possibleein order to give the maximum lever arm, thus resisting tension in the upper portion of the tie and assisting the concrete to resist com pression in the bottom portion under one load condition, or under a reversal of load conditions to take care of compression in the top and tension in the bottom portion of the tie.

1n the section beneath the rails the bars 10, ll, 12 and 13 are spaced for a maximum leverage, and the bars 15 serve to increase the available steel area designed to resist the tensile stresses developed in the bottom of the tie.

The terms and expressions which I have employed are used as terms of description and not of limitation, and I have no intention, in the use of such terms and expressions, of excluding any equivalentsof the features shown and described, or portions thereof, but recognize that various modifications are possible within the scope of the invention claimed.

What I claim is:

1. A reenforced concrete railroad tie having in its upper surface a plurality of recesses, each recess being adapted to receive a pair of blocks, means on the tie for holding each of the blocks from movement in one direction transverse to the axis of the tie and rail-fastening means secured to the blocks adapted to prevent movement of each said block in the opposite direction.

2. A reenforced concrete railroad tie having in its upper surface a plurality of recesses flaring outwardly toward the sides thereof, a pair of blocks, each of wedge shape, seating in each of said recesses, and rail fastening means securing the said blocks from movement outward of the axis of the tie.

3. A reenforced concrete railroad tie having in its upper surface a plurality of recesses for rail supports, each of the said re cesses being of least width on the longitudinal aXis of the tie and inclining horizontally and vertically therefrom, a pair of similarly shaped blocks seating in each such recess and conforming to the shape of the recess, and means associated with the rail for holding each of said blocks from movement in one direction transverse to the tie.

4:. A reenforced concrete railroad tie havmediate portion bent upwardly into truss form beneath and in the region of a recess, another bar arranged substantially in the plane of the ends of the first mentioned bar, spanning the space under the said intermediate portion in the region of said re-' cess to resist tensile stresses in the bottom of the tie, and reinforcing members securing said bars together.

' 6. A reenforced concrete railroad tie having in its upper surface two recesses, rail supporting blocks seating in said recesses, reinforcing bars arranged respectively in planes near the top and bottom of the tie, certain of said bars in each of such planes having an intermediate portion thereof bent to occupy a different plane in the region of the said recesses to provide reinforcement against tensile and compressive stresses about said recesses, and transversely arranged tie rods securing the bars together.

7. A reenforced concrete railroad tie rectangular in crossse'ction and with a pedestal base having rail supporting recesses in the upper surface thereof extending from side to side of the tie, a pair ofblocks seated in each i of said recesses adapted to be brought substantially into contact in the longitudinal axis of the tie, rail fastening means securing the rail to the blocks and adapted also to hold the blocks from movement longitudi nally of the rail, and. reinforcing bars extending longitudinally of the tie, certain of the bars being angled in the region of the recesses to prevent cracking of the concrete thereabout and to resist compressive and tensile stresses, and transversely arranged tie rods securing the bars together.

JULIUS KRUTTSCHNITT.

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