US530884A - Chill for cast-iron car-wheels - Google Patents

Description

(No Model.)

P. GONNELLY. GHILL FOR GAST IRON GAR WHEELS.

1910.530884.l u Pgtented Dem.- 11, 1894.

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Nrrnn STATES PATRICK CONNELLY,IOF ROCHESTER, NEW YORK.

l CHILL FOR GAST-IRON CAR-WHEELS.

SPECIFICATION forming part of Lettersv4 Patent No. 530,884, dated December 11,1894.'k

Application filed June 15, 1 8 92.

To a/ZZ whom it may concern:

Be it known that I, PATRICK CoNNELLY, a citizen of the United States, residing at Rochester, in the county of Monroe, in the State of New York, have invented certain Improvements in Chills for Cast-Iron Car-Wheels, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to certain improvements in the construction of chills for castiron car-wheels,which improvements are fully described and illustrated in the following specification and accompanying drawings, the novel features thereof being specified in the claims annexed to the said specification.

In the accompanying drawings representing my improvements in chills for car-wheels?" Figure lis a plan View of one half of the mold for casting the chill. Fig. 2 is a sectional view. Fig. 3 is a plan of a portion of the mold with chill cast therein. Fig. 4: is a section of a portion of a mold showing the chill in use. Fig. 5 i`s a detail of one of the chill segments. f

In the manufactureof my improved chill, I arrange a number of cast-iron segments A A radially at suitable distances apart in a suitable annular mold having a trough or channel D around the outer ends of the segments, in which trough I cast the ring B which surrounds the segments and binds them together,-the metal of the ring penetrating between the segments in the spacesC and forming the tongues or projections C. The chill is finished by turning or grinding the inner surfaces of the segments and tongues into the proper shape to form the tread and flange of the wheel cast therein.

The chill may be of any desired dimensions, and is used in connection with a cope and drag in casting car-wheels, the same as the ordinary solid chill.

At their outer ends the segments A are provided with the projections F, which are made of such a shape, (preferably dove-tailed) as to engage in the metal of the ring B and secure the segments in place. On the radial sides, the segments are provided with recesses in which are located the cores e, which preferably project beyond the surface and form openings or Ventilating spaces between the seria 110,436,768. (No man.)

segments and the tongues on the ring. These cores extend to the upper and' lower surfaces of the chill, as indicated at h and t', Fig. 2, so that free escape is permitted for any gases in the openings made by the cores into the sand of the cope or drag. The joints between the segments and the tongues allow the gases to find their way to the cored openings, but in order to facilitate their escape, the sides of the segments inside the coresmay be provided with one or more shallow grooves, n, Fig. 2, which may be l'illed with core-material, and afford passage for the heated air or gases which, except for the joints of the groove,would beimprisoned between the chill and the metal of the wheel, and would cause defects in the surface thereof. The cores e are conveniently baked on the segments so that the segments and cores can be handled as one piece. In arranging the segments in the annular trough D, in the mold J, I place the segments at about equal distances apart,- so that the inner surface of the tongues is of the same width as that of the segments, but this proportion may be varied. I'have found that a width of about an inch on the inner Asurface of the segments answers well in practice. The surfaces of the segments, before insertion in the mold, are preferably coated with black-lead, so that the metal of the tongues does not adhere to them and a joint is made between them which will permit the escape of the hot-air or gases. It will be understood that the number and shape of the segments and cores may be varied. The contraction of the ring B on cooling binds the whole structure together with great force. The chill may be provided with trunnions or projections for handling it in any ordinary way. The segments may have parallel sides instead of being made wedge-shaped as herein shown, and the cores need not project beyond the segments.

I do not claim herein anything shown or described in my Patent No. 427,052, dated May 6, 1890. By my present improvements I am enabled to materially cheapen theconstruction of a car-wheel-chill which will produce wheels perfectly true and entirely free from chill-cracks and sweat-spots.

I claim- 1. The combination, in a car-wheel-chill, of

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the radially arranged chill-segments A, the ring B cast around the rear portion of tle segments and with radial tongnes projecting between the segments, and suitable openings through which the joints between the segments and tongues are ventilated, substantially as described.

2. The combination, in a car-wheel-chilLof the radially arranged chill-segments A, provided With recesses for the reception of the cores e, and the ring B cast around the rear portion of the segments with radial tongues projecting between the segments, substan- 4tially as described.

3. The combination, in a carwhee1-chill,of the radially arranged chill-segments A, provided witb recesses for the reception of the Witnesses:

BENJ. L. LANG, F. E. LYFORD.

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