US172611A - Improvement in plates for desiccating eggs - Google Patents

Description

UNTTEE STATES PATENT GEETCED PETER COOPER, OF NEW YORK, ASSIGNOR TO CHARLES A. LA MONT, OF TURNERS, N. Y.

IMPROVEMENT IN PLATES FOR DESICCATING EGGS.

Specification forming part of Letters Patent No. 172,611, dated January 25, 1876; application led February 18, 1875.

To all whom it may concern Be it known that I, PETER COOPER, of the city and State of New York, have invented an Improvement in Apparatus for the Desiccation of Eggs, &c., of which the following is a specification My invention relates to an improvement in the construction of that class of apparatus for the desiccation of eggs, glue, and similar duid or semi-Huid substances, wherein a dim ofthe liquid egg or glue is taken up upon a revolving plate, and dried thereon by exposure to a current of heated air, until it can be removed in the form of hard thin scales or iiakes. It has been found, in practical operation, extremely difficult to obtain a pure and merchantable article of desiccated egg upon snspended and revolving metallic plates, of sufticient thickness to admit of heilig scraped and cleaned by machinery, because of the chemical action of the uid egg upon the metal, which produces a decomposition, and consequent discoloration, of the egg; and, moreover, it has been likewise found impossible to dry either eggs or gine upon such plates, when revolving, in sufcientquantity, With sufficient rapidity, to render the process profitable, because of the eXtreme tenuity of the lm obtained thereon at a single dipping. Hence, in practical use, desiccatingmachines containing revolving metallic dipping-plates have proved unavailable for the preservation of egg and glue for commercial purposes, and experimental tests with plates made of porcelain, glass, and other materials presenting a hard, smooth, and highly-polished surface, as a substitute for metal, have resulted in estabbakedV clay, as a medium for taking up and retainingthe liquid egg or glue until it has been dried by a current of heated air, produced and introduced into the desiccating apparatusin any suitable manner. By means thereof I obtain a desiccating-surface of precisely the quality needed for a thoroughly practical suspended revolving' plate-viz., of sufficient roughness to take up a comparatively large volume of the liquid egg or glue at each di pping, and yet smooth enough to permit a ready detachment therefrom of the dried film, while at the same time entire purity and healthfulness of the egg product thus obtained at a low cost of manufacture is secured.

In the accompanying drawings, Figure l is a plan view of a desiccating-disk 5 and Fig. 2 is a section of a dipping-shaft, illustrating` one manner of arranging the desiccating-disks thereon.

In manufacturing these improved desiccating disks or plates from slate, it is only needful to take the rough slabs as delivered from the quarry, and dress and polish the same into plates of suitable thickness-viz., a thickness of about one-half of an inch fora disk thirty-six inches in diameter. The surface thereof should be left perfectly smooth and true, and yet without high polish. VThe form of the plate is to be adapted to the description of machine in which it is to be used. For the La Mont apparatus they are cut into circular form, (see Fig. 1,) and a central aperture' is formed therein to receive the supporting-shaft, by which they are made to revolve. In manufacturing them from clay, the clay is first properly tempered, as for the manufacture of fire-brick, and then molded into plates or disks of the required dimensions, but of a thickness somewhat greater than in a plate made of slate. These slabs are then baked or burned in a suitable kiln, at such a temperature as shall thoroughly harden and temper them without glazing the surface thereof, so that they shall remain hard and perfectly smooth, and yet to a certain degree porous. Where they are to be placed upon a central shaft the central aperture is formed in each disk in the process of molding, so that the plates, when baked, are ready for use. In using these improved disks ofslate or unglazed earthenware upon a revolving shaft, a packing of canvas, felt, or other elastic material is interposed 'between the several disks or their cious surfaces, adapted to eoileet and retain in intermediate.collars, (see Fig. 2,) and also betheir revolution the liquid film for clesieeutlion, tween. each disk and the shaft upon which it substantially as herein set forth.

revolves.

I claim as my invention- PETER COOPER. As an improvementin bhe art of desieeating Witnesses: eggs, glue, 85e., a revolving non-metallic miu- S. R. GOODALE,

eral plate or disk, formed with uuglalzed tena- DAVID LAUGHLIN.

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