US40998A - Improvement in casting the andrews - Google Patents

Description

ihvrTnn STATES PATENT Ormea.

A. C. EMMICK, OF COLUMBUS, OHIO.

IMPROVEMENT IN CASTlNG THE ANDREWS & KALBACH WATER-WHEEL.

Specification forming part of Letters Patent No. 110,998, dated December 22, 1863.

To all whom, t may concern:

Beit known that I, A. C. EMMIcK, of Columbus, in the county of Franklin and State of Ohio, have invented a new Mode of Casting the Andrews & Kalbach Vater-Vheel; and I do hereby declare that the followingisafull, clear, and exact description thereof, reference being had to the accompanying drawings,making a part of this specification, in which- Figure l is a top view of the core-box in which the cores are made for casting the buckets of the wheel. Fig. 2 is a side elevation of Fig. 1. Fig. 3 is a top view of one-half of the core-box for casting the inner wall ofthe wheel. Fig. et is a side elevation of Fig. 3. Fig. 5 is a perspective view of one of the semicircular false cores of the box of Figs. 3 and i. Fig. 6 is a perspective of the central core produced by the box, Figs. 3 and 4. Fig. 7 is a plan view of the cores set up in a iiask and prepared for the casting. Fig. 8 is a top view of the pattern for a six-bucket wheel. Fig. 9 is a side elevation of Fig. 8, showing the two halves of this pattern. Fig. l0 is a perspective view showing the shape of the buckets.

Similar letters of reference indicate corresponding parts in the several figures.

This invention relates to a new and useful improvement in casting t-he cast-metal wheel patented by Abraham Andrews and Harrison Kalbach, AngustSO, 1859. This wheel is provided with curved concave buckets, and they have hitherto been formed by casting the buckets separately and thon placing or setting them up in a mold and casting the rim and center or hub of the wheel around the buckets. This plan or mode of casting does not form a durable wheel, as the buckets are liable to be come detached or knocked out, in which event the wheel is rendered useless.

My invention consists in cast-ing all the parts composing the wheel-z'. c., rim, buckets, and hub-in one solid piece and at one operation of cast-ing by forming, by means of a suitable mold, cores for the buckets, or, rather, for the spaces between the buckets, and setting these cores up in a mold, as will be hereinafter fully explained.

In the accompanying drawings, Figs. l and 2, I have shown the mold-box in which the cores are made for the spaces between the buckets of the wheel. This mold or core-box is made up of three detachable parts, c a a', screwed together, so that it can be taken apart for removing the core, which is made of sand rammed into the .curved space in the box, in the usual manner of making cores. These cores,when produced from their mold, present on their upper andlower surfaces the form of the upper and lower surfaces, respectively, of the buckets which are produced in casting the wheel, as will be hereinafter described.

The core-box in which the core is made for casting the central wall or hub of the wheel consists of two halves, one half, A, of which is represented in Figs. 3 and 4 of the drawings. The central hole, b b, is intended for producing the axis of the wheel, and the annular projections c c around this hole produce in a cast wheel projections corresponding to them, which thicken, and consequently strengthen, the wheel at these points. These annular projections (one-half of each is shown in the drawings) are removable and attached to the core-box, orhalves thereof, by means of dovetail tenons d d, fitting into corresponding recesses, as shown in Figs. 3, et, and 5. This attachment of the pieces c c or false cores to each half of the core-box allows the core to be drawn, leaving corresponding depressions in it, as represented in Fig. 6 of the drawings. The cores being thus formed, the pattern (represented in Figs. 8 and 9, Sheet 2) is placed in a suitable iiask, which is afterward filled with sand tamped down, in the usual manner of molding patterns. This pattern, which consists of two parts, D E, is now withdrawnfrom the sand, leaving the sand mold in a proper condition for receiving the cores,which Ihave above described. This pattern D E forms a mold ofthe shape and size of the external surface ofthe buckets, hub, and the rim of the wheel.

The pattern D E is made for a wheel having six buckets. This will require a core (made from the box of Figs. l and 2) for each bucket; and these cores are arranged in a circle in such a relation with each other as to leave spaces between their curved upper and lower curved surfaces, the widths of which spaces are equal to the thickness of the buckets. The central core, Fig. 5, is now introduced within the central space inclosed by the bucketcores, leaving a space all around this central core and the inner edges ofthe bucket-cores to receive the metal which forms the hub of the wheel. A like space is also left between the cores B B, Fig. 6, forreceiving the metal which forms the rim of the wheel, (indicated by letter e, Fig. 6.)

The plan View7 Fig. 7, represents the mold7 produced as above described7 with all the bucket-cores in it. The white spaces represent that portion of the mold which is to receive the metal in casting the wheel7 and the dark spaces inclosed by the outer white circle represent the cores arranged n their places, as above described. Thesandsurroundiugthe whole is supposed to be confined in aiask.

rlhe old inode of casting the buckets separately and then placing them in a inold and casting the rim and hub around them does not forni a strong and durable wheel. The buek- E ets of the old wheels are liable to be forced out from the rim or ease and hub by the action oi" l drift-wood or other substances Which are lial blc to pass into the wheel and strike forcibly against the buckets. In the perfect casting, where the entire wheel is of one homogeneous piece, there is no liability of any of its parts becoming detached or deranged from the above causes.

I do not claim, broadly7 casting the several parts of a water-wheel in one piece, for there are some kinds of wheels which are thus cast, the forni and arrangement of the parts admitting of it without any difficulty whatever.

I claim,therefore,as new and desire to secure by Letters Patent- Casting `the Andrews Kalbach waterwheels in one homogeneous piece and at one operation,v in the manner and by means of a mold or molds constructed and arranged substantially as described.

A. C. EMMIGK.

XVi tn ess es ADAMs STEWART, S. W. SrmsoN.

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