US363598A - oonwat - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

- J. N. CONWAY.

PATTERN FOR GAR WHEELS. No. 363,598, PatentedMay 24, 1887.

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ATTORNEY.

(No Model.) 2 Sheets-Sheet 2.

J. N. CONWAY.

- PATTERN FOR GAR WHEELS. I

No. 363,598. Patented May 24, 1887.

Fig- 8- WITNESSES INVENTOR BY CAM ATTORNEY.

N. FETER5. FhoQo-Jlhugmphar. Washington, D t:v

. UNITED STATES PATENT OFFICE.

JOHN N. CQNW'AY, OFBALTIMORE, MARYLAND, ASSIGNOR OF TWO-THIRDS TO JESSE CONVVAY AND GEORGE R. OTT, BOTH OF SAME PLACE.

PATTERN. FOR CAR-WH EELS.

SPECIFICATION forming part of Letters Patent No. 363,598, dated May 24,1887.

Application filed February 18, 1887. Serial No. 228,048. (No model.)

To aZZ whom it may concern-.-

Be itknown that 1, JOHN N. CONWAY, a citizen of the United States, residing at Baltimore,

in the State of Maryland, haveinvented certain new and useful Improvements in Patterns for Oar-Wheels, of which the following is a specification.

My invention relates to improvements in patterns for car-wheels which are cast in a chill, and is illustrated in the accompanying drawings, in which- Figure 1 is a sectional view of the drag and one of the two parts composing my pattern, being that part which forms the side of the wheel having the flange, and which is cast in the drag portion of the flask, and showing it in the position it has while the drag is being filled with sand and rammed. Fig. 2is an inverted plan of one-half of the pattern and the flask part shown in Fig. 1. Fig. 3 is a sectional view of the cope and chill and one of the two parts of the pattern, being that part which forms the outer side of the wheel, and which is cast in the cope portion of the flask. Fig. 4 is a top view of the cope and pattern shown in Fig. 3. Fig. 5. is a diametrical section of the cope part of the pattern, and Fig. 6 is a diametrical section of the drag part of the pattern, both parts in these two figures being in proper relative position to represent the two surfaces of the car-wheel. Fig. 7 shows a section of the flask, sand mold, and core complete, ready for the metal to be poured. Fig.

' 8 shows a section of the car-wheel.

This invention consists in making the pattern of a wheel which is to be cast in a chill in two parts, which together represent all the surface of the wheel that is molded in sand, and providing the cope part of the pattern with shoulders to supportthe chill-ring when molding.

The letter A designates one of the parts of the pattern being that part which includes the wheel-flange I), and embraces one side of the wheel. This part of the pattern forms the mold in the drag O of the flask.

pattern A is placed upon the floor face side up. The drag O is placed over it, as seen in Fig. 1, filled with sand, rammed, and then the pattern and drag are turned over and placed in the position the drag is designed to have when poured. The pattern A is then removed.

In molding, the

The letter D designates the other partof the pattern and embraces the outer side-of the wheel. This pattern has four brackets, I, each of which has a vertical part, m, and a sloping shoulder, a. The said vertical part representsthe tread-rim m of the car-wheel, and the said shoulders receive the part a of the chill when molding and support the chill and cope. By employing the four brackets Z instead of a full rim, the pattern is much lighter. Over the part D of the pattern is placed the chill-ring E and cope part of the-flask, F, both secured together. This part of the flask includes the sand edge which forms the outer edge, g, of the tread of the wheel, which edge it is desirable shall not be chilled. The cope is filled with sand, rammed, and the pattern D removed, and then the cope and chill are placed in position on the drag-mold, the cores h and Zr (see Fig. 7) having been inserted and secured by clamps z. The moldis then ready forpouring, the metal entering at the pour-hole k. The flat sand face 0 at the rim of the drag-mold receives the flat face 0 of the iron chill when the parts of the mold are put together ready for pouring.

It will be seen that my car-whecl pattern of two pieces forms all the outer surface of a carwheel and renders unnecessary the expensive patterns that have heretofore been used, and which, when made in one piece composed of wood and metal representing the entire wheel, are difficult to handle in molding and soon be come so battered and indented as to be incapable of producing a perfect mold. My pattern being in two parts, and each part representing one surface of the wheel only, may be made of metal and still be light and durable.

Every molder in a car'wheel fou'ndryhas an assistant or helper, whose duty, among other things, is to fill sand in, ram, 820. WVhere the wheel-pattern is in one piece, it follows that either the molder-or his helper are unavoidably idle much of the time, the onefbeing delayed while the other is doing his work. It

will be seen, therefore, that an important advantage resultlng from my improvement in therefore, is very materially lessened. In first cost these patterns are cheap, and will wear much'longer than the usual wood patterns.

Patterns of this kind,1nay be used for molding chilled Wheels known as single plate,

double plate, arm, solid or hollow arm.

These patterns may be used with the flask in general use or with any flask.

Having described my invention, I claim and which includes the wheel-flange, and the cope part D, representing the side of the wheel which includes 'the Outer edge of the wheeltread, and said cope part provided with brackets 7, each of which has a sloping shoulder, a, to support the chill-ring when nolding, as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN N. CON'WAY. Witnesses:

J OHN E. MoRRIs, JNO. T. MADDoX.

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