US288969A - Contracting car-wheel chill - Google Patents

Description

. G77 WM (N M l.) 2 Sheets'-Sheet 1.

J N. BARR.

CONTRACTING GAR WHEEL CHILL.

No. 288,969. Patented Nov. 27,1883. go 1 II I } M ME INVENTUR.

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CONTRACTING GAR WHEEL GHILL.

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ATTY 5' IlJNirED STAT PATENT EFFICEP JACOB N. BARR, OF MILW'AUKFE, \VlSC-ONSIN.

CQNTRACTING CAR-WHEEL CHILL.

SPECI IFIGATION forming part of Letters PatentNo. 288,969, dated November 27, 183?. Application filed July 16, 1883. (V model.)

To all; whom) it may 001mm.-

Be it'known that I, J goon FC- BARR, of Milwaukee, county of Milwaukee, and State of \Visconsin, have invented new and'useful improvements in Contracting Car-WheelChills;

. and I do hereby declare that the following is a full and exact description of the same, refercnce being had to the accompanying drawings, and to the letters of reference marked thereon. V

This invention consists, mainly, in thecoinbination, with certain segmental chill-blocks, of special means forimparting to the chillblocks, as the metal of the wheel contracts, a positive, simultaneous, and absolutely uniform radial movement, for'tlie'purpose of obtaining a uniform depth of white iron aboutthc tread of the wheel, as will be fully described hereinafter.

In the drawings, Figure 1 represents a partial top view of a flask for molding car-wheels, which is provided with my improved chill; Fig. 2, a'partial vertical sectional elevation of the same; Fig. 3, a plan view of one group of chill-blocks enlarged, and also a side elevation; Fig. 4, a vertical sectional elevation upon 4 the line Y Y, Fig. 3; 'Fig. 5, a vertical sectional elevation upon the line X K, Fig. 3; and Figs. 6, 7, S, and 9, various views of a moditied form of chill.

To enable others skilled in the art to make my improved chill and to properly use the same, I will proceed to describe its construction and the manner of operation.

A, Fig. 2, represents the drag of the flask,

constructed generally in the usual well-known or any other proper manner; and B, Figs. 1 and 2, the cope.

6, Figs. 1, 2, 3, and i, represents a' ring, preferably of brass or other metal having the quality of expanding and contracting quickly under the influence of heat and cold, which is constructed, preferably, with a vertical portion, 0, Fig. 5, having upon its outer side the horizontal flanges 0 0 as shown, and upon its inner side the bent flanges c c, as shown.

Fig. 1, represents one of a series of slots out in the inner face of the ring; and c, Fig. 1, one of a series of openings communicating with the slots, as shown.

D, Fig. 5, represents an auxiliary ring, of any suitable metal, which is provided below ing abearing-face adapted to openings for together to form with a bearingface adapted to rest upon the upper face of the horizontal flange 0, and

above with an overhanging projection, 41, havrest upon the upper face of the horizontal flange a (1' represents a packing of any proper de scription, by means of which the joints between the rings C and D are made tight. The auxiliary ring D is provided with proper the entrance and exit of hot air or steam and water, and also with'thc usual trunnions by means of which the flask is properly handled.

E represents one of a series of chill-blocks, three or other numbers of which are united a group, G, by means of a common base-bar, e, secured to the base of the blocks at their upper and lower edges, as

shown.

6 represents one of a series of rivets or bolts, by means of which the base-bars of each group are united to the flanges c" c of the ring 0. A sufficient space is left between the adjacent faces of the chill-blocks to allow lateral expansion under the action of heat without improper contact. The space between the groups of blocks, it cidc s with the slots and openings in the ring C.

represents a groove in the chilling-surface, which is adapted to receive sand for the purpose of retarding the chilling process in the flange, thus increasing the depth of white iron in the throat.

The manner of employing my improved chill is substantially as follows: Just before the molten metal is ready to be poured into the mold, steam or hot air is introduced from any proper source into the space or chamber between the rings (J and D. In consequence of this the ring is caused to expand in a circumferential direction, and carry with it, of course, the chilling-blocks, thus increasing the diameter of the space in the mold which is designed to receive the metal. The ring having been expanded to its full extent by the action of the hot air or steam, the stream of molten metal is turned into the mold, and in about twenty seconds after the pouring begins a supply of cold water is substituted for will be observed in Fig. 1, coinand thus give to the chilling-blocks at every point a positive radial movement in aninward direction. In consequence of this movement thefaces of the chilling-blocks are kept in intimatecontact with the'face of the metal of the wheel, as the latterv contracts in the act. of

will now be described. In this modification the chilling-blocks E, ring 0,. and auxiliary ring D of the above-described form are formed of one piece, which has in it the annular chamber c for steam or hot air and water, as shown. f represents a hollow trunnion connected with the chamber, and f an opening. Through this trunnion and opening the steam or hot air and the water may be introduced and discharged. The operation in this case is precisely like that previously described. Steam or hot 'air is first'introduced into the ring for the purpose of expanding the same, and then at the proper time this is replaced by cold water, for the purpose of contracting the same. By the substitution of a cooling agent for a heating one the ring is contracted, and by means of its contraction the segments are moved in an inward direction.

The modification, as shown in Figs. 8 and 9, will now be described. G represents a group of segmental chilling-blockssay six in numberwhich are provided with the proper spa'ce'between adjacent blocks and adjacent group of blocks. 9 represents an extension projecting from the outer face of the baseplate of the group. 9, Fig. 9, represents a retaining-ring having a proper opening through which projects the extension 9, as shown. The retaining-ring g is held stationary, but the groups of blocks are free to move upon the ring in a radial direction. Any prop'-: er means may be employed to give the groups their proper radial movement at the proper time-such, for example, as a chuck, the jaws of which maybe applied tothe extension 9. If

. desired, also, a ring capable of expansion and contraction under the action of heat and cold may be applied to the extensions 9, for the purpose of actuating them..

Some of the advantages resulting from the employment of my improved chill are as follows: By means of the positive radial movement of the chill-blocks in an inward direction by the contraction of the outer ring, an intimate contact is maintained between the chill and the tread of the wheel upon all sides of the same as it contracts in coo1ing;hencethe greatest depth of white iron is obtained uniformly about the entire circumference. By means of the positive contraction of the chill, also, the occurrence of chill-cracks is prevented. The importance of segmental chill-blocks is shown in my Patent No. 207 ,794.

Having thusfully described my invention,

what I claim as new, and desire to secure by,

Letters Patent, is

1. I11 combination with the segmental chillblocks, an outermetallic ring and means'applied to the ring for receiving a force and imparting to the chill-blocks an equable and simultaneous radial movement, all as and for the purpose set forth.

2. The combination of chill-segments and an outer expansile and contractile ring, provided with means for receiving heating and cooling agents, substantially as and for the purpose set forth.

3. In combination. with segmental chillblocks, an external supporting frame-work and means applied to the supporting framework for the purpose of imparting a simultaneous and uniform radial movement to the chill-segments, as and for the purpose set,

forth.

4.. An outer segmental chill and means,sub stantially as described, for imparting to the chilling -surface of the segments a uniform and simultaneous radial movementin addition to that caused by the molten metal, as and for the purpose set forth.

This specification signed and witnessed this 13th day of July, 1883.

JACOB N. BARR.

itnesses: 1 RoBr. A. SHAILER,

F. S. BROWN,

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