US231777A - Chaeles h - Google Patents

Description

2 Sheets--Sheet 1.

0.. H. ELMER. Process of Casting Plow Points, 8L0. No 231,777. Patented Aug. 31, I880.

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, 2 sheets Sheet 2. G. H. ELMER.

Process of Casting Plow Points, 8L9. Np. 231,777. Patented Aug. 31,1880.

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WITNESSES g ATTORNEY rLPETERi FNOTO-LITHOGRAFNER. WAsmNGmN. D C.

UNITED STATES PATENT O FICE.

CHARLES H. ELMER, 'OF ALBION, MICHIGAN, ASSIGNOR TO ,GALE MANU- FAGTURING COMPANY, OF SAME PLACE.

PROCESS'OF CASTING PLOW-POINTS, soc.

SPECIFICATION forming part of Letters Patent No. 231,777, dated August 31, 1880.

Application filed January 8, 1880.

To all whom it may concern:

Be it known that I, CHARLES H. ELMER, of

' Albion, in the county of Calhoun and State of Michigan, have invented an Improvement in Processes of Casting Plow-Points and the Implements therefor, of which the following is a specification.

My invention relates to the process of molding chilled plow'points; and it consists in certain improvements therein, hereinafter more fully set forth, and pointed out in the claims.

Figure 1 is a perspective of that part of the flask ordinarily called the cope, showing it inverted and having the chill adjustably secured thereto. Fig. 2 is a perspective view of the other part of the flask, also inverted. Fig. 3 is a perspective view of the follow-board. Fig. 4 is a view of the chill detached. Fig. 5 is a bottom perspective of a finished point. Fig. 6 is a section showing the pattern placed on the follow-board and the sand rammed in the cope. Fig. 7 is the same reversed, with the addition of the drag, also rammed. Fig. 8 is a cross-section of' the parts in Fig. 7 again reversed, showing the chill in position and the pattern removed ready for casting.

In the accompanying drawings, which form a part of this specification, A represents an inverted cope. It is of the usual form for plowpoint casting, except that it is provided with bolt-holes, through which suitable bolts pass to secure the chill B in place. This chill is provided with two or more lugs, a a, which are slotted, as shown in Fig. at, coincident with the holes in the cope. By suitable bolts the chill is adjustably secured to the cope, which is necessary to enable the operator at all times tocompel the chill to rest against that portion of the pattern where the point, when cast, is required to be chilled.

G represents, as inverted, the other part of a two-part flask, and D the follow-board, of usual construction.

E represents a finished point, provided with a recess, 0, which is ordinarily termed a 6 l k Since plow-points have been made with this look great difficulty has been found in molding them, as, from the peculiar conformation of the point, it was almost impossible to draw the pattern without breaking down the sand which formed the lock. My process obviates this diificulty and enables the operator to cast the points with the face down, (which is the reverse of the present method,) thereby insuring a smooth surface free from sand or air holes and ready for grinding and polishing.

In practice, I lay down the follow-board face up. then lay the pattern thereon face side down, and place the cope on the followboard, if necessary, adjusting the chill against the pattern. Then I fill the cope with sand, rammed in the usual way. Then I cover the cope with a fiat board and turn the whole over, bringing the follow-board on top. This follow-board I then remove and place the drag bottom side up on the cope, till the same with sand, rammed, as is ordinarily done, then lift off the drag and draw the pattern by drawing it obliquely toward the point, so as to leave the lock intact, and form the sprue in the usual manner. When the drag is lifted off, as described, it is turned over right side up, and when the pattern is drawn the cope is turned over right side up onto the drag. The two parts are then secured together by any of the usual methods, and the mold is ready for pouring.

What I claim as my invention, and desire to secure by Letters Patent, is-- l. The process herein described for molding plow-points, consisting in, first, placing the pattern face side down on the follow-board, and applying the cope with the chill attached right side up thereto, adjusting, if necessary, the chill against the pattern, and vfilling and ramming the cope with sand; secondly, in covering the cope with a board, then turning board, cope, and follow-board all over together, next removing the follow-board, and then placing the drag of the flask on the cope,

which is then filled with sand, rammed, re-

moved, and turned over; thirdly, in removing the pattern by drawing it obliquely toward the point, so as to leave the lock intact, and ing bolt-holes in one of its sides, of the adthen turning over the cope and placing it on justable chill B, provided with slotted lugs a 10 the drag, substantially as described. a, substantially as described, and for the pur- 2. The combination, with the cope A, of a pose set fort-h.

5 chill, B, adjustably secured thereto, substan- CHARLES H. ELMEB.

tially as described, and for the purpose set Witnesses: forth. CHARLES J. HUNT,

3. The combination, with the cope A, hav- H. S. SPRAGUE.

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