US819919A - Reinforcement for concrete railroad-ties. - Google Patents

Description

PATBNTED MAY 8, 1906.

LR-UAD TIES,

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airain srarEs earner ESE.

HERBERT E. PEEeivAL,` or eALvEsron, TEXAs, .issienon or chE-'HALF ro BREWER w. KEY, `or woonwnan, oirLaHonA rEeEironr.

FlElNFORCEWlENTFQR GlllCRETE RAlLFD-TlES.

Specification of Letters Patent.

Eatentefiaiay e, ieee.

Applioain'on iilerl Inly17, 1905. Serial No. 269,959.

To 'Ir/ ZZ u/'hm/n it nutty concern: y

le it known that l, HERBERT E. PEiioivAL, a citizen of the United States, and aresident of Galveston, in the county of Galveston and vState of Texas, have invented a new and useful Improvement in Reinforcements for Concrete Railroad-Ties, of which the following is a full, clear, and exact description, reference being, had to the accompanying drawings, forming a part of this specification, in explaining its nature.

The object of my invention is to provide a.

reinforcement for a' cement or concrete tie like that shown and described in my application for Letters Patent of the United States, entitled Railroad-ties, filed July l1, 1904, Serial No. 215,974, allowed January a, 1905. As described in said application the form of the tie-is such as to relieve it from becoming centerboniid. For this purpose the head of the tie is made relatively broad. The ends of the tie are made broad with relatively' wide bearing-surfaces in order that when pressure or weight is applied they may withstand it Without undue sinking, While along the center of the tie the sides converge or slope inwardly in such manner that they present a narrow, almost sharp, cutting bottoni edge or surface to the filling or balla'sting in which the tieish and ri idity may be given it to cut through,

the filling in which the tie is laid.

it is accordingly the special object of my invention to provide the tie with as simple and inexpensive a reinforcing means as possible without resorting to any 'expensive and elaborate truss-support.

The invention can best be seen and understood by reference to the drawings, in which Figure l shows .the tic in side elevation. Fig. 2 shows the saine in plan. Fig. 3 shows a cross-section on the line 3 3 of lig. l. Fig. 4 shows in perspective a portion of the tie, illustrating especially the reinforcement. Fig. 5 shows in perspective the reinforcement apart from the tie 5 and Fig. 6 shows a modi-- or wires.

. single base-bar fied method of constructing the same, to which reference will hereinafter be made.

Referring to the drawings, A represents a forni of tie which is the ysiibiect-matter of my said for-nier application. The tie has the broad head a, the wide bearing end portions a a2, and the narrow cutting central portion a3.

The inode of reinforcing the tie is as follo'ws: There are laid longitudinally in the cement along the head of the `tie rigid metal bars B B' B2, preferably of steel. ln the base of the tie is alsoplaced longitudinally another bar B3. lfor bracing and reinforcing these bars that they when combined may forni a frame, as it were, l. unite them by stiff rods These rods or wires for convenience in understanding their method of connection l have lettered b, b', b2, Yb3, and b, the rods Z; l," `ioii'iing or connecting the head-bars B and B, li'" am. El, respectively, and the rods b2 b3 b4 joining or connecting the headbars B B B2 with the base-bar B3 laid along the bottom of the tie. These sets of connecting rods or wires are located or arranged substantially as shown in the dotted lines of Fig. 1, one at about the middle of the tie, other sets at the ends of the tie, and one or more sets intermei'liately arranged at periodicaldistances along the same. This arrangement, may of course be varied, and in this connection attention is called to the fact that. the .rods may have turned or preformed ends or heads bf by which thcyniay be slipped over the ends of the reinforcing-hars and then arranged individually in such places as to give the most structural strength. The operation of these bars and connecting-rods is that the bars, set longitudinally in the cement of the tie, reinforce the same, and the connecting rods or wires reinforce and strengthen the bars. In other words, they strengthen the bars, so that they cannot easily become bent, holding them, so that they cannot bend away or toward one another. T his may be said especially of the base-bar B3, which is located at a. point where a single re-l inforcing-har only can well be employed and where also a maximum amount of reinforcing strength is required. Now the three. headbars B B l provide a maximum of strength and rigid ity and they, through the coi'iiiectingrods, impart their strength and rigidity to the In Fig. C l have shown a slight modification ofthe reinforcemenh in IOO that there is Wound around the metal bars a sheet of Woven or meshedyvire B4. This not only assists in reinforcing and stren thening the bars7 but also gives a base to W ich the cement may adhere in the formation of the tie.

Having thus fully described my invention, I claim and desire to secure by-Letters Patent of the United States- 1. A tie of the character s ecied having a reinforcement consisting o a lurality of rigld metal bars inserted 1n the ead of the tie, a reinforcing-bar inserted in the base of the tie, and rods or Wires connecting said top bars and each of said top bars with said bottom bar.

2. A tie of the character specified havin a reinforcement consisting of a triangu ar frame, the same comprising a bar inserted in the base of the tie and a plurality of bars inserted in the head thereof, and means connecting said head and base bars for imparting to the base-bar a reinforcing strength and rigidity as against force or pressure acting to move or bend the same in the directionof said head-bars.

3. A tie of the character specified having a reinforcement consisting of a series of bars set into the head of the tie, a bar set into the base thereof, and se arate rods or Wires connecting each of said cad-bars with said base- Y exams A bar, each' rod or Wire making such connection with the bars which it connects as to be ad j ustable along the same.

4. A' tie of the character s eciiied having a reinforcement consistinr o a lurality of rigid metal bars inserted in the ead of the tle, a reinforcing-bar inserted in the base of the tie, rods or Wires conneetin said bars, and a screen of Woven Wirewon around the same, substantial] as described. A

5. A tie of the c aracter s eciied having a reinforcement consisting oi' a plurality of rigid metal bars inserted in the head of the tie, a reinforcing-bar 'inserted in the base thereof and rods or Wires connecting each of said top or head bars with said bottoni or base bar for imparting added .rigidity and strengtli'thereto. l

6. A tie of the character specified having a reinforcement consisting of a series of bars .set into the head of the tie, a bar set into the base thereof, separate rods or Wires connectlng each of said head-bars Wlth said baseoar,

each rod or Wire'inaking such connection with the bars which it connects as to be adjustable along the same.

HERBERT E. PERCIVAL.

In presence of- J. E. KAUFFMAN, W. BALDRIDGE..

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