US226672A - John o keepb - Google Patents

Description

J. OKEEFE. Molding Stove-Lid Bowl, 8vo

No. 226,672' Patented April 20,1880.

F191, A. Y x Fig, 2, n

UNITED STATES PATENT OFFICE.

JOHN OKEEFE, OF ST. LOUIS, MISSOURI, ASSIGNOR TO EXCELSIOR MANU- FACTURING COMPANY, OF SAME PLACE.

MOLDING STOVE-LID BOWLS, 84.0.

SPECIFICATION forming part of Letters Patent No. 226,672, dated April 20, 1880, l Application filed February 16, 1880.

To all whom t may concern: segment from the core, and is moved so as to Be it known that I, JOHN OKEEFE, of St. fill out the core to the curvature of the n- Louis, Missouri, have made a new and useful ished bowl, vand when thus filled out and Improvement in Molding Stove-Lid Bowls and formed the core is uniformly of the proper de- 5 other Articles, of which the following` is a full, gree of hardness, and the casting can then he clear, and exact description, reference being made without defects. A had to the annexed drawings, making part of The method is illustrated in the annexed this specification, in whichdrawings, A, Fig. l, representing the form of 6o Figure l is a vertical section taken through bowl-pattern usedin carrying out the improved 1o a stove-lid pattern used in carrying out the method. Instead of having upon its inside a,

improvement; Fig. 2, a vertical section taken the shape of the intended bowl, it has a prothrough the core-pattern and follow-board; tuberance, ct,the contents of which are equiv- Fig. 3, a sectional view of the core, Fig. 4, a alent to the contents of the bowl-nibs. The sectional view, showing the two parts of the pattern A is then placed on afollow-board, B, 15 mold and the pattern; Fig. 5, a view similar and the sand C rammed in the usual way, to that of Fig. 4, the pattern being removed; leaving a core of the form shown in Fig. 3. Fig. 6, a sectional view of the core in position The other part, D, ofthe mold is then formed for being punched; and Figs. 7, S, 9, respectin the customary manner, and as shown in 7o ively, a side elevation, a plan, and a sectional Figs. 4, 5. The part D is then removed, leavzo view (taken on the line x :v of Fig'. 7) of the ing the core O in the position of Fig. 6. The core after having been punched. punching device (the desirable form of which The same letters denote the same parts. is described in an application for Letters Pat rl`he present invention has relation to that ent therefor of even date herewith) is then form of stove-lid bowl wherein the means for brought into use, and the nib-cavities E E, 25 holding the lid-lifter therein consists in nibs Figs. 7, 8, 9, are formed in the core O. As projecting from the sides of the bowl. the cavities are punched the form of the core Heretofore in casting such bowls the custom changes from that shown in Fig. 6 to that has been to first form a core the exact shape shown in Figs. 7, S, 9, being at the surface c 8o of the inside of the bowl, and then, and by the exact shape of the inside of the intended 3o means of a suitable apparatus therefor, to bowl, and the sand throughout the core is of punch cavities in the bowl-core of the shape the proper degree of hardness for casting, and and size of the intended nibs. Now, the efthe bowl when cast is free from blow-holes. feet of this practice is to cause the sand in the The improvement is especially adapted to core immediately over the points where the stove-lids of the kind named; but it is also 3 5 cavities in question are formed to be comuseful, in molding other articles,in forming they pressed too much and to such a degree of molds for which cavities or depressions have to hardness as to cause blow-holes to occur in the be punched in the sand. casting, onethird ofthe lids, in practice, being I claim- 9o spoiled in the casting. The herein-described mode of molding a core 4o To obviate this diiiculty is the aim of this having cavities for stove-lids and other artiimprovement, which consists in an improved cles, which consists in forming the core with mode of molding the bowl-core, as follows: In a depression the capacity of which is equal place of molding the bowl-core the exact shape tothe sum of the capacities of the cavities to and size of the inside of the bowl, the core is be formed in the core, and then filling out the 45 formed with a depression above the points core to its final shape hy punching the caviwhere the nib-cavities are to be formed, the ties, substantially as described. capacity of which depression is equal to the Witness my hand. sum of the capacities of the intended cavities. The latter are th en formed bypunching the core 5o in the usual way, and in so doing the sand, /Vitnesses:

instead of being compressed, nds vent by OHAS. D. MOODY, reason of the space left by the removal -of the SAML. V. BOYD.

J N O. OKEEFE.

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