US278671A - Jambs h - Google Patents

Description

(No Model.)

J. H. THORP; ARTIFICIAL STONE.

Patented May 29,1883.

N. PHERS. Phewutho nalur. wamingxm D, C.

Nrr ED STATES PATENT ARTIFICIAL STONE.

SPECIFICATION forming part of Letters Patent No. 278,671, dated May 29, 1883.

Application filed October as, 1852. (No model.)

To all whom it may concern:

Be it known that I, JAMES H. THORP, of Baltimore, in the county of Baltimore and in the State of Maryland, have invented certain new and useful Improvements in Artifical Stone; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to letters of reference marked IO thereon, making a part of this specification.

This invention relates to an improved plastic compound or pozzolana to be employed for various architectural purposes, paving, and other like uses; audit has for its objects to provide a composition that will possess, when set and hardened, great strength and durability, and which will be capable of effectually resisting the action of moisture, frost, and heat.

My invention consists essentially in a compound composed of the following ingredients, viz: kaolin, plaster-of-paris, soapstone, jute, caustic alkali, litharge, green copperas, carbolic acid, liquor ammonite, and dextrine or 2 5 other gummy substance. These materials may be employed in proportions varying with the uses to which the compound is to be applied. For general purposes, however, I prefer to employ the ingredients in the following propor- 0 tions, to wit: kaolin, ten pounds; plaster-ofparis, twenty pounds; soapstone, ten pounds; jute, one pound; caustic alkali, six ounces; litharge, four pounds; green copperas, ten pounds; carbolic acid, one pint; liquor ammonite, one pint; dextrine, tenpounds.

In preparingthe composition I first make a solution in one hundred gallons of water of caustic alkali, copperas, carbolic acid, ammonia, and dextrine in proportions named,

and mix the other ingredients therewith, forming a compound which readily sets andhardens and which is extremely strong and durable, and which is applicable to various structures and other purposes.

My improved compound may be employed in the same manner as the ordinary plastic compounds used for thepurposes above mentioned but when employed as a pavement or flooring I prefer to lay it in a solid mass and to perforate it at intervals, so as to enable it to give when subjected to the action of frost or heat, and also to provide for ornamentation by filling the perforations with the compound differently colored than the mass forming the body of the pavement or floor. In order to conveniently and uniformly efi'ect this purpose I make use of the apparatus or devices illustrated in the accompanying drawings, in which Figure 1 represents a perspective view of my improved device Fig. 2, a vertical sectional View thereof; and Fig. 3, a perspective view of a modification of my device.

The letter A indicates a slab of metal or other suitable material, perferably of cast iron,

however, and provided on oneside at suitable intervals with suitable angular tapering projections B, and on the opposite side with knobs or hemispherical projections C, as indicated in Figs. 1 and 2 of the drawings;

In the modification shown in Fig. 3, the de vice consists of a cruciform piece of metal having tapering angular projections at the ends, and an opening at the center.

In using my improved device, as above described, the pavement or flooring is laid in mass and allow to set, but before hardening the device is applied, the conical projections being forced into it, so as to form apertures, which may be afterward filled with the composition differently colored, so as to form suitable ornaments, or when. it is not desired a to form the angular apertures the device may be inverted, so as to impress the surface by means of the knobs forming hemispherical recesses, which may be afterward filledas before men tioued.

Havin g thus described my invention, what I claim, and desire to secure by Letters Patent,

The compound herein described, for architectural and other purposes, composed of kaolin, plaster-of-paris, soapstone, jute, caustic alkali, litharge, green copperas, carbolic acid, liquid ammoniee, and dextrine matter, in the proportions and combined substantially as herein set forth.

In testimony whereof I affix my signature, in presence of two witnesses, this 17th day of October, 1882,

JAMES H. THOBP. Witnesses:

J. J. MCCARTHY, WM. ALEXANDER.

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