US479783A - Skeleton frame for sand-cores - Google Patents

Description

(No Model.)

W. H. CASS. SKBLETON FRAME FOB. SAND GORES.

Patented Aug. 2V, 1892.

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inventor. JM 7a ttorney.

Witnesses.

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UNITED STATES PATENT OEEIcE.

VILLIAM I-I. CASS, OF BUFFALO, NEW YORK.

SKELETON FRAME FOR SAND-CORES.

SPECIFICATION forming part of Letters Patent N0. 479,783, dated August 2, 1892.

Application tiled April 6, 1892. Serial No. 4=28,011` (No model.)

To all whom it may concern.-

Be it known that LWILLIAM H. OAss, a citizen of the United States, residing in Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Skeleton Frames for Supporting a Green-Sand Core for Railroad Journal- Boxes, of which the following is a specification.

My invention relates to certain im provements in green-sand cores for molding and casting journal-boxes for railroad-cars, and will be fully and clearly hereinafter described and claimed, reference being had to the accompanying drawings, in which- Figure 1 is a vertical longitudinal section through a flask, cuttingthrough the core and skeleton supporting-frame in or about line a d, Fig. 5. Fig. 2 is a back end View of a journal-box similar to that which my invention is adapted to mold with a green-sand core. Fig. 3 is aside elevation of the skeleton supporting-frame. Fig. 4 is a side elevation 0f Fig. 2. It is shown for the purpose of illustrating substantially the form of journal-box to be molded. Fig. 5 is a plan View of the skeleton supporting-frame.

In Fig. l of said drawings, 1 and 2 represent the upper and lower portions of an ordinary cast-iron flask, the parting being at the point 3. The journal-box 4t is shown in section in the sand, a rear elevation of which is also shown in Fig. 2 and a side elevation in Fig. 4.

The green-sand core 5 is shown in Fig. 1 in its proper position in the mold and flask. lVithin the core 5 is the skeleton supportingframe. It is curved so as to conform nearly to the shape of the bottom of the journal-box, as will be seen by reference to Fig. l, and is provided with a series of upper and lower projecting pins '7, the object of which is to more securely hold the particles of sand of which the core is composed together. These upward and downwardly projecting pins 7 are rigidly secured on the three longitudinal curved bars 8, (see Figs. 3 and 5,) which are fastened together by connecting-bars 9 at each end, substantially as shown in Fig. 5, the Whole being preferably east or formed in one piece of cast-iron. At each end of this skeleton frame, on its under sides, is a series of two or more downwardly-proj ectin g pieces l0, which form a portion of each end of the core and rest down upon the edges of the flask at the points 11 and 12,within the openings through which the ends of the core projects, substantially as shown in Fig. 1. These end downwardly-projecting portions l0 are important because they support not only the weight of the core when put in the mold, but also prevent the ends of the core from being broken by the Weight of the core when set in place.

If desired, the usual vent-holes can be put longitudinally through the core while being made in the ordinary and well-known Way.

This skeleton frame can be used for any kind of journal-box for cars by slightly changing its form. I

I claim as my invention- A skeleton frame for supporting a greensand core for molding journal-boxes for railroad-cars, consisting of a series of longitudinal bars secured together by transverse pieces at the ends, each longitudinal bar being curved to conform substantially to the bottom of `the core and provided with a series of upward and downward projecting pins, and downwardly-projecting supporting-pieces at each end, for the purposes described.

WILLIAM I-I. CASS. Witnesses:

JAMES SANGs'rEE, ARTHUR J. SANGSTER.

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