US1052442A - Tie-plate. - Google Patents

Description

UNITE STATES PHILIP W. MOORE, OF EVANSTON, ILLINOIS, ASSIGNOR TO THE P. & M. CO., OF CHICAGO,

ILLINOIS, A CORPORATION OF ILLINOIS.

TIE-PLATE.

Specification of Letters Patent.

Application filed March 13, 1911.

Patented Feb. 4,1913.

Serial No. 614,149.

To all whom it may concern Be it known that I, PHILIP W. MooRn, a citizen of the United States, residing at Evanston, in the county of Cook and State of Illinois, have invented new and useful Improvements in Tie-Plates, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to tie-plates.

One of the objects of the invention is to provide a tie-plate having a body portion adapted to sink into a tie to aid in anchoring said tie-plate on said tie and of such a configuration as to exclude water from beneath the tie-plate.

Another object is to provide a tie-plate of simple configuration which may be manufactured economically.

In the accompanying drawings I have illustrated two embodiments of my inven tion which have certain practical advantages, other embodiments, of course, being contemplated. Referring to the drawingsz-Figure 1 is a bottom plan view of one form of tie-plate embodying the invention. Fig. 2 is a section on line 2, 2, of Fig. 1. Fig. 3 is a section on line 3, 3, of Fig. 1. Fig. 1. is a bottom plan View of another form of tie-plate embodying the invention. Fig. 5 is a section on the line 5, 5, of Fig. 4:.

The main characteristic of both forms of tie-plate illustrated, is that the under side is more or less concave or arched. hen the tie-plate is in position beneath the rail, it is pressed into the soft wood of the tie without causing any special damage to the wood fibers. The extent to which the body of the tie-plate sinks into the wood is determined in the main by the degree to which the under surface of said tie-plate is arched or hollowed out. The tie plate sinks into the wood until substantially the entire under surface thereof is in contact with the adjacent upper surface of the tie. This upper surface therefore becomes slightly crowned and may project upwardly above the normal surface of the tie. The periphcry of the tie plate does not cut the fibers, but depresses them. Hence there is no rapid deterioration at these points. Instead the useful life of the tie is increased as the embedding of the periphery in the wood of the tie forms a seal and prevents the entrance of water or excessive moisture between the tie plate and tie. Furthermore the crowned upper surface of the tie insures the absence of water or excessive moisture between the tie-plate and the tie. Where the tie has been creosoted or otherwise treated with a preservative, which penetrates as a general rule only a slight distance beneath the surface of the tie, the extent to which the tie plate seats itself in the tie is not sufficient to cause penetration below the portion so treated and therefore water does not have the access to the untreated portion.

In Figs. 1, 2 and 8, the body portion 1 is preferably provided with a fiat upper surface for receiving the rail base and with walls or ribs 2 completely surrounding each spike hole, preventing water from reaching the tie through these openings. Additional inclosing walls or ribs 3 are preferably provided on the base of the tie-plate around each hole. although I do not limit myself to this construction. These lower ribs are adapted to sink into the tie and thereby increase the hold of the tie-plate with respect to the tie. Downwardly extending ribs 5 are preferably provided which depress the fibers of the tie and thereby augment the amount of resistance which the tie-plate offers against movement in a horizontal plane. These ribs may be of any suitable configuration as long as they perform this function.

The form of tie-plate 6, illustrated in Figs. 4 and 5 is similar to that just described except that no additional projecting ribs are provided. When the tie-plate is firmly seated on the tie, its end hold is relied on to prevent movement of said tie-plate along the tie. This hold or anchorage may be augmented by the downwardly projecting walls surrounding each spike hole.

Although in the forms illustrated the tieplate is thinner at the center portion than at the edge, the hollowing out is not great enough to appreciably weaken the tie-plate. In the first form illustrated the provision of the intersecting ribs results in stiffening the tie-plate at the most effective points. Both forms of tie-plate are illustrated as having fiat upper surfaces. Of course, it is apparent that the top of the tie plate may be of any suitable configuration and may be provided with any of the well known shoulders, grooves, jaws or other means for cooperating with a rail.

The wood fibers of ties would disintegrate rapidly if subjected frequently to moisture for considerable periods. The exclusion of moisture therefore from beneath the tieplate lengthens the useful life of the tie. In the construction described the tie-plate rests upon practically dry wood.

The invention is not to be limited to the particular embodiments described, nor to the details thereof as these forms were selected for purposes of illustration only.

It is apparent that the invention may be embodied in numerous forms and therefore I desire to include broadly all suitable equivalent means for accomplishing the desired result as long as theyfall within the scope of the appended claims.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. A tie-plate having its under surface arched both longitudinally and transversely whereby it is adapted to seat itself on a tie by the penetration of the body portion thereof into said tie, the penetration of said body portion being greatest around the outside edges of the tie-plate and gradually decreasing toward the center portion of said tie-plate.

2. A tie-plate having a central area adapted to rest on the normal upper surface of a tie, said tie-plate gradually increasing in Copies of this patent may be obtained for thickness in all directions toward its periphery whereby the remaining portions of the tie in contact with the under side of said tie-plate are depressed below normal surface of said tie.

3. A tie-plate having a substantially spherical under surface of slight curvature adapted to bear at all points against the upper surface of a tie and having additional projecting portions adapted to be pressed into the tie to increase the anchorage of said tie-plate.

4. A tie-plate having a curved under surface and having a plurality of radially arranged, sharpened, projecting ribs which decrease in height as they approach the periphery of the tie-plate, said ribs being adapted to be pressed into the tie to aid in anchoring said tie plate.

5. A tie-plate having spike holes and having a concave under surface, the upper surface of said tie-plate being provided with projecting ribs which completely surround each spike hole, the base of said tie-plate being provided with projecting ribs which surround each spike holeand are adapted to be pressed into a tie to increase the anchorage of said tie-plate;

In witness whereof, I have hereunto subscribed my name in the presence of two witnesses.

PHILIP W. MOORE. l/Vitnesses E. R. KING, GEo. B. JONES.

five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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