US1127A - Improvement in the mode of molding, preparatory to casting - Google Patents

Description

`UNITED STATES STEPHEN PARSONS, OF EDGECOMB, MAINE.

IMPROVEMENT IN THE MODE OF MOLDING, PREPARATORY T0 CASTING, CURVED VENT 0R REACTION WATER-WHEELS.

Specification forming part of Letters Patent No. LHT?, dated April 1S, 1339.

To @ZZ whom, it may concern,.-

Be it known that I, STEPHEN PARSONS, of Edgeco1nb,in the county of Lincoln and State oi Maine, have invented a new and improved mode of molding and casting very powerful water-wheels on the centrifugal principle, the power of which is given by the action of the iiuid operating upon a particular angle, curve, and size of the vents, also from the form of the partitions between the vents and the size for the inlets of the water, and by the exact proportion of all the parts in the construction of said wheel, so ,that the propelling-power shall be applied to the interior of the wheel; and I do hereby declare that the following is a full and exact description of the same.

The nature ot my invention consists in a peculiar mode of molding and casting iron water-wheels that can bc applied to any kind of water-works ,and in any position, either vertical,horizontal, or oblique, and even when wholly immersed by iioods.

To enable othersto make and use my said invention, I will proceed to describe its construction and operation, reference being had to the annexed drawings of the same, making part of this specification, in which- Figure l is a plan ot' the trestle-plate; Fig. 2, a plan of the core; Fig. 3, a perspective view of the oven; Fig. ek, a perspective view of the wheel cast, and Fig. 5 a side elevation of the core placed on the furnace.

I construct my centrifugal curved ventwheel of any size by providing a cast-iron plate of the requisite diameter', usually about iive-eighths of an inch in thickness, with a circular hole in its center ot sufficient size to let the heat pass through while the core is baking. On said plate, Fig. l, T sweep the dotted circle Aior the diameter of the wheelsay fortyinches. l then make a second circle B-say twenty-six inches diaineter-for the size oi the inlet of the water. I then make a third circle Csayfourtecu inches in diameter-to set one foot ot' the dividers in when sweeping the curve ot' the vents. I then divide said circle C into sixteen equal parts a. I then open the dividers thirteen inches fora wheel of the size designated, set one foot in a on circle C, and sweep the curve b from circle B to circle A, so as to make the chord ot the curve?) nineteen and one-halt inches, and thus proceed until sixteen curves arc completed.

Then drill two holes through said plate in each curve IJ of an equal distance from each end of said curve at c to receive the dowels in the lower edges of the curve-plates D to hold them in their proper places when molding. a furnace E about one foot high, and provide sixteen iron platesD,eight inches high, curved so as to conform to the curve b, their lower edges somewhat smaller, so as to draw easily from the mold, having two holes cl in the inner edge of an equal distance from each end for dowels, agreeing with and conforming to the holes c in the curve lines b. (The reason why the holes in the curves b and in the plates D should be at equal distances fromw each of the ends is in order to use either side of said trestle-plate, which will reverse the turning of the wheel.) Said curve-plates D above specified are nineteen and one-half inches in the chord of the curve and about iive-eighths of an inch thick in the middle of the upper edge, and their ends are brought nearly to an edge, in order that the iiuid may have fr ee passage in its egress from the center to the periphery of the wheel. T then erect the curve-plates D on the trestle-plate with the dowels d in the holes c conforming to the curves l). T then take conic hoops F and G as high as the curve-platesD and of suiiicient strength to raise the core by, which hoops must be perforated with holes to give vent to the gas that will arise while casting. rllhe conic hoop F should be three inches less in diameter than the inlet of the water or iiuid inside of the curve-plates D and set with its large end downward. The hoop G should be about three inches larger in diameter at the smallest end and be set with its small end downward outside ot' said plates D, as in Fig. l. I then fasten said hoops F and G so as to form concentric circles, said plates D being arranged between them, as shown in the draw ings, Fig. l.. proceed to lill the core, and while filling the same insert a sui'ticient number of curved nail-rods between each plate to strengthen the core when the plates are withdrawn, and when the core is finished (of which Figx represents a top view and 5 a side View) cover it with a cylindrical oven, Fig. 3, and bake it. Said core is lifted from the plate, Fig. 1,by the conic hoops F and G and placed I then place the trestle-plate, Fig. l, on

T then fasten said plates D andN in a sand mold made in the usual )my by n. The Within-described manner of casting n block pattern prepared for thatpurpose. The 1 centrifugal curve vent;` Water- Wheel conlnold is now ready,and the process of casting struebed as herein set forth.

is performed as usual, which Will produce the centrifugal curve vent-Wheel represented by STEPHEN PARSONS.

Fig. 4. Witnesses:

That I Claim as my invention, and desire HAZARD KNOWLES,

to Secure by Letters Patent, is XVM. H. BREWSTER.

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