US1239927A - Inner rail for railroad-track curves. - Google Patents

Description

J. W. McMANAMA. INNER RAH; FOR RAILROAD TRACK CURVES.

APPLICATION Fl LED JAN. 30, I91].

I Patented Sept. 11, 191?.

T R? NM UNIT I ST rs PATEN march.

JoHIv 'w. 'MGMANlZXMA, or WALTHAM, ivrAs'snoi-rusnfrs, ASSIGNOR or ONE-THIRD :TOYSAMUEL snvronns AND"ONE3THIRD To mariners 'A, BARBEY, "BOTH or CAMBRIDGE, MAssAoHcs'E'T'trs.

INNER RAIL 1 FOR RAILROAD-TRACK CURVES.

1 "Specification of Iietters Patent.

Patented Sept. 11, 191 *7.

Application' 'filed January 30, 1917. SeriaI'NO. 145,385.

T0 (ZZZ whomz't may concern:

Be it known that 'I, J OHN WV. MCIVIANAMA,

citizen of the UnitedStates, residing at.

lValtham, in the county of h/Iiddlesea and State of Massachusetts, have invented new and useful Improvements in Inner Rails for Railroad-Track Curves, of which the following is a specification.

This invention relates to a railroad-track curve of the character disclosed by Letters Patent of the United States, No. 1,006,579, and including a curved inner rail having its tread face reduced in width from the standard size, for purposes set forth and described by the specification of said patent.

The chief object of the invention is to improve the design of the inner rail in such manner that first, the wear and reduction of height of the tread face, due to the grind ing action of wheels thereon, will not result in any substantial increase in the width of said face, and secondly, the base portion of the rail head, including the downwardly facing bearing surfaces which contact with the upper edges of the angle plates connecting the ends of the rail with other rails, has a width equal to or approximating that of the base of the head of a standard rail. Another object is to otherwise improve the design as hereinafter pointed out.

To these ends the invention consists in the improvements hereinafter described and claimed.

The accompanying drawing is a transverse section of a rail embodying the invention.

In carrying out my invention, I provide the head 12 of the rail with a base, preferably of standard width, said base including the downwardly facing bearing surfaces 18 projecting from opposite sides of the web 14:, a relatively narrow tread 15, and diversified sides'characterized as follows:

Said sides include substantially parallel upper portions 16 extending downwardly from the tread 15, and forming therewith the wear-sustaining portion of the rail head,

base, and intermediate portions 18 joining said upper and lower portions. As here shown the intermediateportions 18 are inclined and preferably curved, downwardly and outwardly from the portions 16 to the portions 17, said intermediate portions forming fillet surfaces between said upper and lower portions.

The following are suitable dimensions of portions of the rail head:

Distance between the side portions 16, 16, one and thirteen sixteenths inches.

Distance between the side portions 17, 17, three inches. 1

lVidth of side portions 17 approximately one-fourth of an inch.

These dimensions may, of course, be varied.

WVhile the side portions 17 are shown as transversely flat, they may obviously be transversely curved or convex.

The distance between the bearing surfaces 13 of the head and the opposed hearing surfaces 20 of the rail flange 21 is preferably the same as in a standard rail, to permit the interposition of standard angle plates between said surfaces. The distance .between the tread 15 and the base of the rail head is preferably greater than in a standard rail, to permit reduction of the height of the tread surface by wear, without unduly sacrificing strength. This results in a height or distance between the tread and the under side of the flange which is greater than in a standard rail. This increase of height over that of a standard rail, joined to the end of my improved curved rail, may be compensated for in practice by raising the standard tangent rail by means of shims, or like well known contrivances.

I claim 1. A railroad rail, the head of which has a relatively wide base, including downwardly facing bearing surfaces at opposite sides of the web, a relatively narrow tread, and sides including substantially parallel. upper portions extending downwardly from the tread, and adapting the tread to be worn down without substantial increase of its width, lower portions joining said bearing surfaces, and outwardly and downwardly inclined intermediate portions forming fillet surfaces between said upper and lower portions.

2. A railroad rail, the head of which has a relatively wide base, including downwardly facing bearing surfaces at opposite sides of the web, a relatively narrow tread, and diversified sides extending from the tread to the base, and including upper portions adapting the tread to be worn down without substantial increase of its width lower portions defining the width of the head base, and intermediate portions joining said upper and lower portions.

3. A railroad rail, the head of which has a base including downwardly facing bearing Copies of this patent may be obtained for five cents each, byaddressing the Commissioner oi Patents.

surfaces at lopposite sides of the web, and a 'surfaces, and the height of the rail, or the distance between the tread and the bottom 0f the rail flange, being greater than the standard height.

In testimony whereof I have afiixed my signature. I

JOHN W. MGMANAMA.

Washington, D. G.

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