โ Scribed by Charles M. Cresson; W.P. Tatham; C. Chabot; H.R. Heyl; Isaac Norris Jr.
No coin nor oath required. For personal study only.
method of carbonizing fabrics and casting therefrom, Reports that Mr. Outerbridge's invention consists essentially in the preparation of organic textile fabrics, such as cloth and lace, and the natural organic structures of ferns, grasses, and the leaves of plants, so that they can be exposed to very high heats without causing a disturbance of their form by destructive distillation.
The material which has been su~ected to this process becomes ~.apable of resisting the action of the heat from molten cast iron, and may be used as a part of the surface, or facing, of a mould, for the purpose of producing an intaglio impression of the material in cast iron, or other metal, and which casting can be employed, in the manner of a die, for the purpose of reproducing the design, or figure, upon leather, wood, or metal.
The material to be used as a pattern, or mould, is first dusted with finely-powdered carbon, and then packed in finely-ground carbon within a refractory case, made of cast iron, graphite, clay, or other suitable material. This case is fitted with a lid sufficiently close to prevent such free access of air as would allow of combustion, but which is loose enough to permit the escape of the vapors and gases which are produced by the after treatment.
The case and contents are then placed in an oven, and subjected to a temperature of about 3oo ยฐ F. for several hours, until the escape of volatile matters from the case has ceased.
The case is then removed from the oven, placed in a suitable furnace or forge, and the temperature gradually raised to and kept
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