US1951644A - Tie plate - Google Patents

Description

March 20, 1934. E. H. BELL 1,951,644

TIE PLATE Filed Jan. 15, 1932 T' 'l .J.

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Patented Mar. 20, 1934 UNITED STATES PATENT OFFICE 11 Claims.

This invention relates to tie plates and more particularly to a tie plate of maximum strength and relatively light weight, so constructed that the load carried by the plate will be uniformly i distributed from end to end of the plate.

The plate of the present invention is an improvement on plates such as shown in my United States Letters Patent No. 1,669,441 issued May 15, 1928. The plate shown and described in my 10. aforesaid patent is provided with spaced apart,

initial tie bearing surfaces and recessed ends and median portion, the load being transmitted only tothe initial tie bearing surfaces between said recessed portions during the seating period. An 1'51 important object of the present invention is to transmit the load uniformly from end to end of the plate at all times, beginning with the time of initial seating of the plate on the tie.

In the drawing:'

Fig. 1 is a bottom plan view of a tie plate embodying my invention.

Fig. 2' is a longitudinal sectional view of same. -Fig. 3 is a longitudinal sectional View showing a slightly modified construction.

Fig. 4 is a fragmentary top plan view of the plate.

Referring now to that form of the invention which I have chosen to illustrate in the drawing, the plate is provided with a top rail bearing surface 5 and a transversely extending rail abutting shoulder 6. The rail bearing surface 5 extends from the shoulder 6 toward the other end of the plate to a line indicated at 7. Between the shoulderfi and the margin 7 of the rail bearing surface 5, the top of the plate is provided with two transversely extending grooves 8 and 9, which are spaced apart by a relatively narrow, transversely extending portion of the rail bearing surface indicated at 5. The combined widths of the grooves 8 and 9 are preferably equal to about one-half of the aggregate widths of the rail bearing surfaces 5 and 5', between the shoulder 6 and margin 7 thereof, and said grooves are preferably of the depth and contour indicated by 5 the dotted lines in Fig. 1 and by the sectional view, Fig.2.

In each of the grooves 8 and 9 are a plurality of parallel, arcuate surfaces 10 extending transversely of the grooves and longitudinally of the I plate, said arcuate surfaces intersecting to form a plurality of ribs 11. The lowermost portions of the arcuate surfaces 10 form the bottomsof the grooves 8 and 9, and the ribs 11 are in a plane slightlybelow the rail bearing surfaces 5 and 5.

T While these ribs 11 may be in the same plane as said rail bearing surfaces, if desired, such an arrangement would require slightly more metal than does the construction shown, without add-f ing to the efficiency of the plate. The ends of the arcuate surfaces 10 curve upwardly and but, w'ardly as indicated at l2 to form an arch-like construction between the ends of the groove stirfaces 10 and the rail bearing surfaces5 and 5'. The effect of the construction described isto' largely compensate for the elimination of metal 619 from the top of the plate and to produce an unusually light and eiiicient tie plate.

The bottom of the plate consists of transversely extending tie bearing surfaces 13, 13, located be neath the edges of the rail seat 5, longitudinally 7 0" extending ribs 14 and 15, surfaces 16 intermediate the ribs 14, and surfaces 1'? intermediate the ribs 15.

The ribs 14 and 15 decrease in width from the center and ends of the plate toward the surfaces 1% 13, 13, and the points or lowermost surfaces of the ribs 14 and 15 are in the same horizontal plane as the tie bearing surfaces 13, 13, and together constitute the initial tie bearing surfaces which support the plate, from end to end, on the'tie';

The surface 16 intermediate the ribs 14 streterably fiat from one longitudinal margin of the plate to the other, midway between the surfaces 13; that is, in that part of the bottom l6 indi cated at 18 in Fig. 2. From the surface 18, the 8B" bottom 16 is inclined downwardly toward thesur faces 13, 13, as indicated at19, 19, in Fig. 2. The surfaces 19 are thus flat transversely and inclined longitudinally. d

The surfaces 17, between the ribs 15, are flat It] transversely and inclined longitudinally, up Wardly from the surfaces 13 toward the plate ends, as indicated at 20, and if desired, may be longitudinally fiat at the ends 21.

The ribs 14 and 15 are of greatest depthat the" 96* center and ends of the plate, and decrease depth and merge into the body of the plate be neath the edges of the rail seat.

The blunt ribs 22 which depend from thesu'r faces 13, 13, are seated in the tie promptly after 109 the plate has been subjected to loads, the function of the ribs 22 being to hold the plate against movement longitudinally of the tiewhile seating is taking place. The actual tie bearing surfaces through which the load is transmitted to" the time are the lower surfaces of the ribs 14 and 15 and the surfaces 13, 13.

Referring to the modified plate shown infFig.

3, the surfaces 23, 23, between the ribs 14, in cline downwardly from the center of the plate no toward the transverse ribs 24, and the surfaces 25 between the ribs 15 incline upwardly from said ribs 24 toward the ends of the plate. The surfaces 23 and 25 merge into the ribs 24 by fillets 26, and these fillet surfaces and the lower surfaces of ribs 14 and 15 constitute the initial bearing surfaces and distribute the load from end to end of the plate.

The greatest strain on a tie plate is directly beneath the edges of the rail seat. In the plates herein shown and described, the needed reinforcement under the edges of the rail seat is secured by inclining the surfaces intermediate the longitudinal ribs toward that part of the bottom beneath the edges of the rail seat. The plate is thus supported from end to end, on the tie, the thickness is substantially uniform (except for the difference accounted for by a canted top surface) but the greatest weight is concentrated beneath the edges of the rail seat. The location and arrangement of the reinforced grooves in the upper surface in combination with the described bottom construction produces the advantages herein pointed out.

Changes may be made in details of construction without departing from the scope of my invention and I do not intend to be limited to the exact form shown and described, except as set forth in the appended claims.

I claim:-

1. A tie plate having on its top a rail bearing surface and a rail abutting shoulder, and on its bottom a plurality of longitudinally extending ribs terminating in one horizontal plane and separated between their ends by transversely extending tie bearing surfaces in the same plane as the lowermost portions of said ribs, said tie bearing surfaces being located beneath the edges of the rail seat, and bottom surfaces, located between the said longitudinal ribs, longitudinally inclined upwardly from said tie bearing surfaces toward the median and end portions of the plate bottom.

2. A tie plate having on its top a rail bearing surface and a rail abutting shoulder, and on its bottom a plurality of longitudinally extending ribs separated between their ends by transversely extending tie bearing surfaces in the same plane as the lowermost portions of said ribs, said tie bearing surfaces being located beneath the edges of the rail seat, and bottom surfaces, located between the said longitudinal ribs, longitudinally inclined upwardly from said tie bearing surfaces toward the median and end portions of the plate bottom, said longitudinally extending ribs being tapered in width, and widest at the middle and ends of the plate.

3. A tie plate having on its top a rail bearing surface and a rail abutting shoulder, and on its bottom a plurality of longitudinally extending ribs separated between their enh by transversely extending tie bearing surfaces in the same plane as the lowermost portions of said ribs, said tie bearing surfaces being located beneath the edges of the rail seat, and bottom surfaces, located between the said longitudinal ribs, longitudinally inclined upwardly from said tie bearing surfaces toward the median and end portions of the plate bottom, said longitudinally extending ribs being tapered in width, and widest and deepest at the middle and ends of the plate.

4. A tie plate having on its top a rail bearing surface and a rail abutting shoulder, and on its bottom a plurality of longitudinally emending ribs terminating in one horizontal plane and separated between their ends by transversely extending tie bearing surfaces in the same plane as the lowermost portions of said ribs, said tie bearing surfaces being located beneath the edges of the rail seat, and bottom surfaces, located between the said longitudinal ribs, longitudinally inclined upwardly from said tie bearing surfaces toward the median and end portions of the plate bottom, and a plunt, transversely extending tie engaging rib depending from said tie bearing surfaces beneath the edges of the rail seat.

5. A tie plate having on its top a rail bearing surface and a rail abutting shoulder, and on its bottom a plurality of longitudinally extending ribs terminating in one horizontal plane and separated between their ends by transversely extending blunt ribs located beneath the edges of the rail seat, and bottom surfaces longitudinally inclined upwardly from said blunt ribs toward the median and end portions of the plate bottom.

6. A tie plate having on its top a rail bearing surface and a rail abutting shoulder, and on its bottom a plurality of longitudinally extending ribs separated between their ends by transversely extending blunt ribs located beneath the edges of the rail seat, and bottom surfaces longitudinally inclined upwardly from said blunt ribs toward the median and end portions of the plate bottom, said longitudinally extending ribs being tapered in width, and widest at the middle and ends of the plate.

'7. A tie plate having on its top a rail bearing surface and a rail abutting shoulder, and on its bottom a plurality of longitudinally extending ribs terminating in one horizontal plane and separated between their ends by transversely extending tie bearing surfaces in the same plane as the lowermost portions of said ribs, said tie bearing surfaces being located beneath the edges of the rail seat, and bottom surfaces, located between the said longitudinal ribs, longitudinally inclined upwardly from said tie bearing surfaces toward the median and end portions of the plate bottom, the top of the plate, inwardly of the transverse rail abutting shoulder and opposite edge of the rail seat, being grooved transversely of the plate.

8. A tie plate having on its top a rail bearing surface and a rail abutting shoulder, and on its bottom a plurality of longitudinally extending ribs terminating in one horizontal plane and separated between their ends by transversely extending tie bearing surfaces in the same plane as the lowermost portions of said ribs, said tie bearing surfaces being located beneath the edges of the rail seat, and bottom surfaces, located between the said longitudinal ribs, longitudinally inclined upwardly from said tie bearing surfaces toward the median and end portions of the plate bottom, the top of the plate, inwardly of the transverse rail abutting shoulder and opposite edge of the rail seat, being grooved transversely of the plate and provided with arcuate surfaces intersecting in ribs extending transversely of said grooves and longitudinally of the plate.

9. A tie plate having on its top a rail bearing surface and a rail abutting shoulder, and on its bottom a plurality of longitudinally extending ribs separated between their ends by transversely extending tie bearing surfaces in the same plane as the lowermost portions of said ribs, said tie bearing surfaces being located beneath the edges of the rail seat, and bottom surfaces, located between the said longitudinal ribs, longitudinally inolined upwardly from said tie bearing surfaces toward the median and end portions of the plate bottom, said longitudinally extending ribs being tapered in width, and widest at the middle and ends of the plate, the top of the plate, inwardly of the transverse rail abutting shoulder and opposite edge of the rail seat, being grooved transversely of the plate and provided with arcuate surfaces intersecting in ribs extending transversely of said grooves and longitudinally of the plate.

10. A tie plate having on its top a rail bearing surface and a rail abutting shoulder, and on its bottom a plurality of longitudinally extending ribs terminating in one horizontal plane and separated between their ends by transversely extending tie bearing surfaces in the same plane as the lowermost portions of said ribs, said tie bearing surfaces being located beneath the edges of the rail seat, and bottom surfaces, located between the said longitudinal ribs, longitudinally inclined upwardly from said tie bearing surfaces toward the median and end portions of the plate bottom, and a blunt, transversely extending tie engaging rib depending from said tie bearing surfaces betending blunt ribs located beneath the edges of the rail seat, and bottom surfaces longitudinally inclined upwardly from said blunt ribs toward the median and end portions of the plate bottom, the top of the plate, inwardly of the transverse rail abutting shoulder and opposite edge of the rail seat, being grooved transversely of the plate and provided with arcuate surfaces intersecting in ribs extending transversely of said grooves and longitudinally of the plate.

EDWIN H. BELL.

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