US789270A - Steel casting. - Google Patents

Description

PATENTED MAY 9, 1905.

G. M. ERVIN. STEEL CASTING.

APPLIOATION FILED JAN. 2, 1904.

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G. M. ERVIN. STEEL CASTING.

APPLICATION FILED JAN. 2, 1904.

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UNITED STATES Patented May 9, 1905.

PATENT OEEIcE.

GEORGE M. ERVIN, OF JOHNSTOWN, PENNSYLVANIA, ASSIGNOR TO THE LORAIN STEEL COMPANY, A CORPORATION OF PENNSYLVANIA.

STEEL CASTING- SPEGIFIGATION forming part of Letters Patent No. 789,270, dated May 9, 1905.

Application filed January 2, 1904' Serial No. 187,555-

To all whom it may concern:

Be it known that I, GEORGE M. ERVIN, of Johnstown, in the county of Oambria and State of Pennsylvania,'have invented a new and useful Improvement in Steel Castings, of which the following is afull, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification.

My invention has relation to steel castings, and more particularly to railway-track-structure castings, the object being to provide a strong and rigid structure which shall be very largely, if not entirely, free from internal strains.

In the application for patent of Frank Na ther, of J ohnstown, Penhsylvaniaofeven date herewith, Serial No. 187,571,there is described and broadly claimed railway-track-structure castings of the general character to which my invention relates and which consist each of a central connecting portion and diverging rail members of substantially uniform section throughout and free from the junction of rela tively thick and thin parts, which have heretofore been the cause of internal strains in the finished casting. In the specific form of structure shown and described in said application the rail members are united in pairs by continuous independent webs extending through and supporting the central portion of the structure.

My invention, which is within and tributary to the broad invention described and claimed in said application, is specifically distinguished therefrom in that instead of employing independent contiiiuous webs extending through the central portion I join the webs of the several rail members by an auxiliary web of substantially uniform thickness with the rail-webs, keeping alsothe junctions of uniform thickness. This auxiliary web ties all the members of the structure without giving rise to strains and forms an additional support for the said central portion.

My invention will be better understood by reference to the accompanying drawings, in which- Figures 1, 2, and 3 are top plan views of difl'erent forms of track-structure castings, showing the application of my invention thereto; Fig. 4, a section on the line 4 4 of Fig. 1; and Figs. 5, 6, and 7, bottom plan views, respectively, of portions of the castings shown in top plan inFigs. 1, 2, and 3.

The letter A wherever seen designates the rail members or extensions of the casting, having the web portions a and base portions (0, and B the central connecting track-surface forming portions thereof. In the structure shown in Figs. 1 and 5 the web portions (0 are all united by a circular web a of substantially the same thickness as the webs a through out. In Figs. 2 and 6 the connecting-web a is of rectangular form, joining the webs a at its corner portions. In Figs, 3 and 7 the connecting-web a is of general rectangular form, with the webs-a joined to the central portions of its sides. In each of these constructions it will be noted that the metal in the connecting-web is so disposed as to avoid any substantialincrease in thickness at its junctions with the webs a, and from Fig. 2 it will be noted that this web is also of substantially uniform thickness with the metal of the portion B. The webs a are preferably thinned somewhat toward their outer ends, as described and claimed in the said application of Frank Nather, to adapt them to be united to the connecting track-rails by the usual joints.

It will be obvious that my invention is applicable to various forms of track-structure castings, and hence I do not wish to be limited to the particular structures which I have here shown.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. A railway-track-structure casting, consisting of a central portion and diverging rail members, the webs of the latter, at said central portion, being united by a connecting-Web of substantially uniform thickness therewith.

2. A-railWay-track-structure casting, consisting of a central portion and diverging rail members, all of substantially uniform thickness in section, the Webs of the latter being thickness as said Webs throughout its length 10 united at the central part of the structure by and also at its points of junction therewith.

a connecting Web, of substantially uniform In testimony whereof I have aflixed my sigthickness with the rail-webs. nature in presence of two witnesses.

3. A railWay-track-structure casting consisting of a central portion and diverging rail ERVIN' members, all of substantially uniform thick- Witnesses: ness of section, and a connecting-web uniting L. OCoNNELL,

all the rail-Webs and of substantially the same H. W. SMITH.

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