US2420A - Improvement in the method of casting statues - Google Patents

Description

UNITED STATES PATENT- OFFICE.

LAWRENCE MYEBS,OF PHILADELPHIA COUNTY, PENNSYLVANIA.

IMPROVEMENT IN THE METHOD OF CASTING STATUES. I

Specification forming part of Letters Patent No. 2,420, dated January 8, 1842.

To all whom it may concern:

Be it known that I, LAWRENCE MYERS, of the county ofPhiladelphiaand State of Pennsylvania, have invented a new and useful improvement in the art of making statues ofiron and allothercastingsoffusiblesubstances,however complicated the form, without joints in the mold or any opening therein whatever, except the usual ones for receiving the fluid metal and for the escape of the air, whereby thecastin g is free from the protuberances and unevenness of surface incident to the ordinary mode.

My invention consists in making a model or pattern of wax exactly corresponding with the object required to be cast, which I cover all over with a liquid blacking composed of one pintof pulverized charcoal, one gill of rye-flour, one gill of molasses, one gill ofsour beer,which are to be well mixed together and then diluted with sufficient water to make it a rich liquid blacking, to be applied to the model or pattern several times, as the weightof the casting may require. While the blacking thus put on is moist I apply my facing-sand to the model or pattern, thereby causing the sand to adhere more firmly to the blacking. To the model or pattern I apply very small tubes, of a funnel shape, of tin or other metal, from one-eighth to one-half an inch in diameter at the small end, for the purpose of conveying away the melted wax from those parts of the model from which it would not otherwise escape, which I close up after the wax has been discharged. The model or pattern thus prepared is then placed, as usual, in a flask large enough to embrace the whole, in which I put my sand and ram it hard around and close to the model or pattern until the whole thereofis incased. The flask, with the model or pattern, is then placed in an oven sufficiently heated to dry the mold entirely and melt the wax, by which operation the wax escapes through the main aperture aforementioned, and through tubes for that purpose from every partofthesand mold,which is left entire. After the wax is withdrawn, as before mentioned, the blacking adheres to every particular part of the sand mold, and presents a most perfectsurfaee and faithful delineation of the figure or model, and produces a handsome smooth casting, far excelling any now in use.

Having since myinventionof the wax model or pattern, as before described, been informed that a model or pattern of wax has been in use in foreign countries, I claim only as my invention and desire to secure at this time by Letters Patent- The mode of preventing oxidation on the surface of the metallic casting and obtaining a finer and smoother surface and delineation of the figure by means of the aforesaid compound or any other substantially the same, applied to the wax model in the manner set forth.

LAWRENCE MYERS.

Witnesses:

J OHN THOMSON, J. MITCHELL.