US2064664A - Railway tie-plate - Google Patents

Description

Dec. 15,1936. H, L, KEEN 2,064,664

RAILWAY TIE PLATE Filed July 27, 1934 l 7 I I] T :Lcufi. F W I 1 l V W I INVENTOR I4 m H W I Harold L. Keen BY I 1 ATTORNEY Patented Dec. 15, 1936 UNITED STATES PATENT OFFICE I 4 Claims.

This invention relates generally to apparatus for fastening railroad rails to the cross ties usually set in the road-bed for supporting them, and more particularly comprises an improved form of slotted plate and a pair of cooperating, bifurcated dogs set in such slots to grasp the base flange of such rail having the standard form of T-shaped cross-section.

The invention is designed to produce simple forms of such plate and dogs which can be easily made by a drop-forging process and which, when assembled under and about the rail flange on the tie, can be securely fastened to the latter by two spikes of ordinary form; said spikes, when driven into the tie for said purpose, also wedging the dogs into gripping engagement with both rail-flange and plate.

The best form of apparatus at present known to me embodying my said invention is illustrated in the accompanying sheet of drawings in which,

Fig. 1 is a plan view of a rail resting on two plates supported on wooden ties, parts being broken away;

Fig. 2 is a cross-section on line 2-2 of Fig. 1, on a larger scale and Fig. 3 is a detail, fragmentary section on irregular line 33 of Fig. 1.

Throughout the drawing like reference characters indicate like parts. Numeral l indicates generally the T-rail of standard section, and 2, 2 the wooden ties for supporting it. 3 indicates generally a substantially flat plate resting one on each tie and having a shallow groove 4 in its upper surface into which the bottom flange [4 of the rail fits quite snugly, 5, 5 are spaced-apart slots in plate 3, preferably extending along one and the same straight line transversely of the rail flange l4 resting therein. If desired said slots 5.5 may each extend a little way under said flange as shown in Fig. 2.

In said slots 5. 5 are seated bifurcated dogs indicated generally by numerals 6, 6 each having a lower jaw l projecting under plate 3, and an upper jaw 9 resting on the upper surface of the rail-flange I4.

The parts are so proportioned that when said dog jaws have been shoved toward the rail-flange far enough to produce an initial engagement between the upper jaw 9 and the upper surface of the rail-flange, and between the lower jaw l and the under surface of plate 3, enough open space will be left in each slot behind the tail of the dog mounted therein to receive the lower portion of a wedge-shaped spike H) as shown at the left hand side of Fig. 2. When thereafter such spike is driven down into the position shown at the right hand side of Fig. 2 the dog 6 will have been forced into firm wedging engagement with flange l4 (the upper surface of which slopes downwardly and outwardly from the web I l of the rail in the usual manner, as shown) and also with the under surface of plate 3. This firmly clamps the plate and railflange together, and at the same time and in one operation fastens the plate and dog to the tie 2.

Preferably the plate 3 is grooved as shown at 8 to receive the lower dog jaw l and the bottom of said groove is slightly inclined in a direction opposite to the inclination of the upper surface of rail flange M. This divides and increases the wedging action of the dog jaws on the assembled plate and rail flange. Preferably, also the upper jaw 9 of each dog is undercut so as to form a relatively sharp under lip I2 at its extremity which may bite into the upper surface of railfiange M. The tail of each dog may also be slightly inclined from a vertical plane as shown at I3 to conform to the wedge-shaped longitudinal section of each spike l0 and give a better bearing for the latter. Similarly the upper surface of each lower dog jaw 1 may be inclined to conform to the inclination of the bottom of groove 8 in which it lies, so as to get broader bearing surfaces for the wedge action of the under jaw on said plate.

Various changes could be made in the details of construction and arrangement above described, so long as the resulting apparatus is within the definition of one or more of the appended claims. The ends of two rails might meet over plate 3 between the dogs, or two pairs of dogs and slots might be used for each plate so as to respectively grasp the abutting ends of two rails.

Also the extent to which the jaws 9, 9 overhang flange I4, may be varied to any desired extent so long as a flrm grasp on the rail is maintained.

Having described my invention, I claim:

1. Apparatus for fastening railroad rails to their supporting tiescomprising, in combination, a substantially flat plate adapted to rest on such tie and provided with two longitudinally aligned slots therethrough extending in a direction substantially parallel to such tie and spaced apart a suflicient distance to extend on either side of the flange of a railroad rail of standard crosssection, resting on said plate, together with two bifurcated dogs of metal adapted to fit one in each of said slots with its upper jaw establishing substantially line contact with the top surface of such rail-flange along a line parallel to the edge of the rail-flange and its lower jaw extending under and in surface contact with the under surface of said plate, said jaws being so proportioned with reference to said slots and the thicknesses of the said plate and rail flange that when they are placed in said slots and pushed toward said rail far enough to have their said jaws initially engage said flange and plate there will be an open space left at the outer end of each such slot large enough to receive the lower end of a. wedge-shaped spike inserted therein from above; whereby, when the parts are so assembled and such spikes are driven down far enough into the tie to; fasten said plate thereto, said dogs will be thereby wedged into closer engagement with the rail-flange and with said plate, thereby firmly clamping the two together, and also fastening both to the tie.

2. A combination such as defined in claim 1 in which the non-bifurcated ends of said dogs are slightly beveled to conform to the taper of the particular wedge-shaped spike to be so used.

3. In a railway tie-plate assembly, a dog for clamping the rail to the tie-plate comprising a shank portion, and a bifurcated portion having upper and lower jaws, the lower jaw having a flat inner surface adapted to coact with the under side of the tie-plate, the upper jaw having an undercut inner surface forming a linear bearing edge .adapted to coact with the upper side of the rail-flange along a line parallel to the length of the rail.

4. A dog as defined in claim 3 in which the shank portion has a tapered end adapted to coact with the body of a wedge-shaped spike in clamping the tie-plate and the rail-flange between the jaws of the bifurcated portion of said dog.

HAROLD LLEWELLYN KEEN.

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