US29745A - Improvement in flasks for casting iron columns - Google Patents

Description

kwere imperfections.

lJNrrn` Shares PATENT Ormea.

HENRY DEMMIOK, OF N EV YORK, N. Y., ASSIGNOR TO HIMSELF AND PETER H. JACKSON, OF SAME PLACE.

IMPROVEMENT vIN FLASKS FOR CASTING IRON COLUMNS.

Specification forming part of Letters Patent No. 29,745, (lated August 2l, 1860.

To @ZZ whom, it may concern Beit known that I, HENRY `DEMMICK, of the city and State of New York, have invented and made a certain new and useful Improvement in Flasks for Molding Columns and Similar Articles; and I do hereby declare that the following` is a full, clear, and exact description ofthe construction and operation of the same, reference being had to the annexed drawings, making part of this specification, wherein- Figure l is a plan of my said flask. Fig. 2 is a side elevation of the same. Fig. 8 is a cross-secti0n thereof, and Fig. 4 is a cross-section showing one of the sides laid over ready for dressing.

Similar marks of reference denote the same parts.

In molding columns it has been usual heretofore to .pack the sand around the pattern, and then take out the same, dress the surface of the mold, and then lay in the core.

In the dressing of The sides of the mold as they stood in a vertical position, particularly with square or box columns, great inconvenience is experienced on account of the small amount of room and the unhandy position; hence the sides of the mold have been fitted to lift off with a crane, in order to expose the face to inspection and dressing where there This was always done at the risk of the whole sand face falling off by any jar, and also at the risk of not returning it exactly to the former position. Besides this, great difficulty was experienced inintroducing the core, particularly with box-columnsiinished or paneled on all four sides, and

said core had to be parallel, or nearly so, orl

it could not be lowered into place between the two standing sides.

The nature of my said invention consists of cheek-pieces hinged onto the bottom part or the nowel,whereby the sides can be turned down when molded, the surface inspected and dressed, the core put in place after one side is turned up, and then the other side is turned up, and the eope7 is laid in place, andthe casting made in said iiask. l

In the drawings, a is the nowel formed of the desired size and shape. b b are the cheekpieces, hinged to a at c c, and cl is the cope. These parts are to be provided with the necessary ring-bolts or eyes e e, by which they may be hoisted or lowered, and the nowel and cope have lthe usual cross-bars to sustain the sand. y The cheeks b b are to be formed of two pieces, as shown, so that by the removal of one therlask could be used for avery small column; but by the separation of these pieces a bar, 0, as seen in the section, Fig. 6, of greater or less width, can be introduced, and the whole secured by the clamps and screws ff.

g is a sand-cleat introduced on theinner face of the cheeks b b, near the bottom edge thereof. Said cleats g g are attached by bolts, so that I can raise them up, in order to mold columns of less size by bringing the pattern 7c above the cope a, thereby extending the capacity of my mold and avoiding the necessity of having a separate flask for each column; and-h h are flanges, made with ribbed edges and dovetail bases, setting between ribs cast on the inside of the cheeks b b. (See plan, Fig. 5.) By this mode of connection these sand-lianges can be removed and others substituted, either longer or shorteuwider or narrower,according to the size of column, so as to come sufficiently near the pattern; and in cases where projecting ornaments occur these metallic sand-cleats may be removed entirely, or shorter ones substituted.

t z' are holes in the flanges of the cheeks, nowel, and cope, by which they are attached firmly by keybolts to resist the force of the melted metal when poured.

The operation is as follows: rIhe side k of the pattern is molded in the nowel in the usual way,and turned over onto the base Z. The sides or cheeks b b are then set up in place, the hinges cc being united. rIhe side patterns, m m, are put in place with a center block to support the patterns. Parting sand is spread between c and b, and the molding-sand filled in and rammed as usual, the dowels being withdrawn, so that after the top pattern, u, has been molded the cope d may be lifted off with its pattern, then turned over, the pattern removed, the surface inspected and dressed. The sides or cheeks b b are then to be laid down horizont-ally, as seen in Fig. 4, said cheeks turning on the hinges, and the sand being supported by the cleats g. The respective patterns m m are to be removed, the surfaces of the mold inspected and dressed. One side is then turned up into place, the sand or other lcore introduced and properly positioned, rIhen the other cheek is turned up into its former position, the cope d is placed on the cheeks, the parts are keyed togetheigand 'the whole is ready for casting. By this inode of opening the ask I am enabled to introduce an irregular-shaped core, corresponding to the shape of the external surface, as seen by red lines in Fig. 3, thereby obtaining the same thickness of metal throughout thc casting, 'which is a great advantage, because, il the Styles are thicker than the panels, the latter are often cracked bythe contraction of the metal. It the moldwere not fitted to open, as aforesaid, it will be apparent this core could not be introduced, ecause it is not parallel, butwider in someplaces than the main body ef the mold. From the foregoing description it will .be understood that there is no risk of the sides not coming to their exact place, no chance of jarring and injury to the sand, and the workmen are greatly facilitated in inspecting the mold and dressing the saine; hence I am enabled'to produce better castings with a less expenditure of labor than with any Iiask before invented with which I am acquainted.

I do not claim hinging the respective parts of molds to each other, as that is well known; but

Vhat I claim, and desire to secure by Letters Patent, :is-

1. The ilasl; for casting columns, composed e f f, ittcd in the manner specified, so that the flask can be enlarged by separating said cheekpieces and introducing a bar between said parts, as specified.

In witness whereof I have hereunto set my Signature this 15th day of June, 1860.'

HENRY DEMMIGK.

Nfitnesses:

LEMUEL W. SnnnnLL, THos. Guo. HAROLD.

Images