US403191A - Chill-core for casting sash-weights - Google Patents

Description

(No Model.)

.0. S. HUMPHRE-Y 85 H. H. GOOD.

CHILL GORE FOR CASTING SASH WEIGHTS- No. 403,191. Patented May 14, 1889.

qwi/twmw I Ejwmmtom UNITED STATES PATENT OFFICE.

CHARLES S. HUMPHREY AND HENRY H. GOOD, OF BELLEFONTAINE, OHIO.

CHILL-CORE FOR CASTING SASH-WEIGHTS.

SPECIFICATION formingpart of Letters Patent No. 403,191, dated May 14, 1889.

Application filed September 26, 1888. Serial No. 286,469. (No model.)

To all whom, it may concern.-

Be it known that we, CHARLES S. HUM- PHREY and HENRY H. Goon, citizens of the United States, and residents of Bellefontaine, in the county of Logan and State of Ohio, have invented a new and useful Cast Chill- Core for Castings, of which the following is a specification.

Our invention is an improved cast chill-core for use in casting window-sash weights in connection with our improved casting-box, or with other molds, as shown.

Figure 1 is a top view; Fig. 2, a side view; Fig. 3, a view of the molding-box with the movable gate and patterns in position; Fig. 4, a top view of the cast weight with the chillcore yet in place, (shown in dotted lines.) Fig. 5 is a longitudinal sectional view of the flask with gate and pattern therein.

A is the body of our cast chill-core; B 0, two sides cast in arcs of a true circle eccentrio to each other; D, the face of the chill that lies even with the outer face of the weight in casting; E, the neck of the chill; F G, the beginning of the circles; H, plug in which the neck of the chill fits; I, handle of the plug; K, molding box or flask; L, movable gate; M, scale on side of the molding-box; P, patterns for the sash-weight.

The object and operation of our device are as follows: In casting windowsash weights it is desirable to cast them with a small hole through the upper end, (for the insertion of the cord,) which enlarges below and opens out at the side to receive and retain a knot on the end of the cord and enable the knot to hang in the center of the weight, so that the weight can hang plumb. Formerly this was accomplished by means of a baked sand core. Finding this plan. expensive and tedious, we have devised the present invention, which consists of a cast chilljcore tapering on all sides toward the neck, and having two of the sides next to and opposite the opening true arcs of a circle, but placed eccentrically to each other, so as to give the required taper to the core and enable it to be easily withdrawn from the Weight after casting. The other two sides have a gradual taper to the neck. D of the core is rounded and of the same shape as the outside face of the weight. Our cast- The face ing box or flask is made in one part with an adjustable gate. The weights are made to Weigh so much to each inch in length-say one pound for every inch of the sash-weight. On the side of the box is a scale by which to set the gate to get a weight of any desired Weight. Two patterns, P, are shown in the flask, with one endin the adjustable gate and one in the hole in the end of the mold-box. After the sand has been tamped around the pattern the patternis withdrawn through the hole in the box. After the pattern is withdrawn the neck of our chill-core is inserted in the plug H and the plug inserted, with the core, in the'end of the casting-frame, so that the core will be inserted into the mold with the neck centered in the end of the mold and the rounded part D resting against the side of the mold. Before insertion into the mold, however, the core is oiled with some thick or heavy oil and rolled in sand until coated. Without this it could not be taken from the weight after casting. After the core has been placed in position the metal is poured into the gateway, filling the mold and surrounding the core, except where, the part D presses against the side of the mold. Then the weight has gotten cold, the plug H is withdrawn and the flask lifted off. As the metal cools, it shrinks around the tapering core and starts it loose, and enables the operator, when it has cooled, by a tap of a hammer on the projecting end of the neck of the core, to knock the core out of the weight, the coating of oil and sand on the outside of the core facilitating the operation and causing the core to slide backward in the hole, instead of being clamped too tightly by the shrinking iron.

It will be observed that the two sides of the core which come next to and opposite the exithole must be arcs of true circles, else it cannot be taken from the weight after being cast.

By using a chill-core of this form much labor, trouble, and expense are saved, as the burning of sand cores is laborious, expensive, and oftentimes a failure for many trials.

Our core is preferably made of hard cast metal.

WVhat we claim isl. The combination of the pattern, the plug or core support H, and the molding-box h.a'v

ing a hole in the end for the Withdrawal of IQheving' a hole in its end for the Withdrawal the 1)&13t8l11,Wi1311 the horn-shaped core A, haw of the pattern, the movable gate L, the horning the rounded smooth face I), as and for the shaped core A, and the plug II, as and for the purpose set forth. purpose set forth.

5 2. The combination with box K havin a 1 V 1 1 r hole in its end for the withdran al of the bggg pattern, of the hornshaped core A, having T the smooth face D and stem or neck E, as and \Vitnesses: for the purpose set forth. \V. A. FULTON,

10 b. The combination of the pattern, the box \V. M. CLASON.

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