US453373A - And lazard kahn - Google Patents

Description

(No Model.)

J. MoDERMOTT & L. KAHN. OHILL GORE FOR MOLDING LEG SOCKETS FOR STOVES.

.No. 453,373; Pate'ntedJune 2,1891.

6 a Inventors 1 I f. l t orney" UNITED ST TES PATENT OFFICE.

JAMES MCDERMOTT, OF LOUISVILLE, KENTUCKY, AND LAZ ARD KAHN, OF HAMILTON, OHIO; SAID MODERMOTT ASSIGNOR' TO SAID KAHN.

CHILL-CORE FOR MOLDING LEG-SOCKETS FOR STOVES.

SPECIFICATION forming part of Letters Patent No. 453,373,da.ted June 2, 1891, Applicationfiled March 20, 1891. Serial No. 385,731. (No model.)

To all whom it 110.01g concern.-

Be it known that we, JAMES MoDERMoTT, of Louisville, Jefferson county, Kentucky, and LAZARD KAHN, of Hamilton, Butler county, Ohio, have invented certain new and useful Improvements in Devices for Molding Leg- Sockets for Stoves, of which the following is a specification.

Leg-sockets on stoves are generally formed by a pair of ribs cast upon the under side of the stove-bottom, the inner walls of these ribs being angular to form dovetailed recesses to receive the dovetailed shanks of the legs. If in molding these ribs the ribs arefastened permanently to the pattern of the stove-bottom, then the ribs will not draw from the sand. It is therefore customary to dowel the rib-patterns loosely to the pattern of the stovebottom, so that when the bottom-pattern is drawn from the sand the ribs remain in the sand to be withdrawn separately subse quently. This plan involves small loose pattern-pieces, always objectionable, and they are apt to get slightly displaced while in use and destroy the accuracy of the dovetailed socketin the ultimate casting. In some cases the dovetailed sockets have been separately formed and left within the mold,the metal of the stove-bottom uniting with such sockets by process of fusion; but there are many objections to this system. I

Our improvements will be readily understood from the following description, taken connection with the accompanying drawings, in which- Figure I is a perspective new of, our 1mproved chill-core; Fig. 2, a vertical section of a portion of the pattern of a stove bottom ready to be withdrawn from the sand, and shown in in connection with our improved chill-core; and Fig. 3, a vertical section of a portion of a stove-bottom with dovetailed leg-socket, of usnalform and as produced by our improved apparatus.

In the drawings, A indicates a portion of an ordinary stove-bottom; B, the usual ribs cast upon the under side of the stove-bottom to form the dovetailed socket for a leg; 0, the dovetailed leg-socket formed between the ribs; D, the pattern employed by the molder 1 n producing the mold for the stove-bottom,th1s

bottom-pattern being substantially a duplicate of the casting to be'produced; E, the ribs upon the under side thereof to produce the ribs B of the leg-socket, these ribs E of the pattern, however, having their inner walls straight or without any dovetail characteristics, or, if desired, even beveled somewhat the reverse of the dovetail, the ribs being secured permanentlyto the pattern of the stovebottom; F, the sand forming the mold forthe under surface of the stove-bottom, Fig. 2 showing the bottom-pattern as being ready for Withdrawal from the sand; G, a device, herein termed a chill-core, to be used in connection with the pattern and sand to form the dovetailed leg-sockets in the casting of the stove-bottom, this device consisting of a skeleton plate of metal, preferably of cast-iron, having its two opposite edges in dovetail form corresponding with the form of the shank of the leg which is to fit into the leg-socket of the stove-bottom; H, the two side ribs of the chill-core, corresponding in edge contour and in width across from one outside edge to the 5 other to the contour and width of the legshank to be employed in the leg-socket; I, a cross-bar connecting the two edge pieces of the chill-core, this cross-bar being preferably depressed downwardly, as seen in Fig. 1; J, a prong, of which there may be more than one, if desired, projecting downwardly from the chill-core, and shown as projecting from the cross-bar; K, sand in the mold between the stove-bottom pattern and the depressed cross- 8 5 bar and L flanges projecting outwardly from the chill-core at the base of its two dovetailed edges. p

The pattern for the stove-bottom is made, as indicated in Fig. 2, with the ribs E permao nentl y attached to it and having, as explained, no dovetails upon their inner walls. The chill-core is to fit up in between these ribs, as shown in Fig. 2, with the flanges L resting against the lower surfaces of the ribs E to prevent sand from entering the angular recesses formed between the inner Walls of the ribs E and the outer dovetailed walls of the chill-core.

The molder takes his pattern in hand and places the chill-core between the ribs E, the chill-core then becoming a part of the pattern. I

He then rams his mold, tucking sand at K between the plate part of the pattern and the depressed cross-bar I, if the depressed cross bar be employed. It the cross-bar be not depressed, then no tucking will be required. Having rammed the flask in the usual manner and having opened the flask, the molder now lifts the pattern D from the sand. The chill-core remains in place, being held in the sand by the prong J. The flask is now closed and the metal poured, as usual. The metal will fill the mold-spaces formed by the ribs E and will flow up against the dovetailed walls of the chill-core. When the castingis shaken out, then the chill-core is knocked out endwise,-leaving a leg-socket having smooth dovetailed surfaces cast upon a chill and of accurate form. The chill-core may, instead of being open at the center or of skeleton form, be fiat and plate-like, the object of the open center and depressed cross-bar being to permit as much sand as practicable to get to the under surface of the bottom-pattern, so as to reduce the area of bottom-casting which will be chilled.

Fig. 2 illustrates the stove-bottom as being molded bottom downward; but it will be readily understood that the sand shown in Fig. 2 may be the sand of the cope or the sand of the drag, as desired. If the lower surface of the bottom-pattern is molded in the drag, then the cope will be lifted ed, and then the pattern will be lifted from the drag, leaving the chill-core in the drag. If, however, the

upper surface of the bottom is molded in the drag, then the cope will be lifted off, bringing the chill-core with it and-leaving the pattern to be lifted from the drag, as will be readily understood by viewing Fig. 2, turned upside down.

\Ve claim as our invention-- 1. In a device for molding leg-sockets for stoves, a chill-core having dovetailed edges and flanges at the base of the dovetails, and adapt-edfor use substantially as set forth.

2. In a device for molding leg-sockets for stoves, a chill-core having two flanged and dovetailed side bars connected by a cross-bar, and adapted for use substantially as set forth.

3. In a device for molding leg-sockets for stoves, a chill-core having two flanged and dovetailed side bars connected by a depressed cross-bar, and adapted for use substantially as set forth.

4:. In a device for molding leg-sockets for stoves, a chill-core having dovetailed and flanged side edges and having alaterally-projecting prong, and adapted for use substantially as set forth.

JAMES MCDERMO'IT. LAZARD KAHN.

Witnesses as to McDermott:

J AS. FITTON, J. W. SEE. Witnesses as to Kahn: M. S. BELDEN, J. W. SEE.

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