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UNITED STATES PATENT OFFICE
HENRY F. BELCHER, OF IRVINGTON, NEW JERSEY.

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Henry F. Belcher
1 of 20
MOSAIC OF GLASS AND LEAD GLAZING.
SPECIFICATION forming part of Letters Patent No. 303,359, dated August 12, 1884.
To all whom it may concern:
    Be it known that I, HENRY F. BELCHER, a citizen of the United States, residing at Irvington, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Mosaics of Glass, &c., and Lead Glazing; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.
    This invention relates to that class of mosaics formed by casting a metallic frame-work around mineral pieces previously prepared and arranged in position to produce the required design.
    The object of the invention is to reduce the cost of producing such mosaics, to secure a more perfect finish, to gain greater firmness or rigidity in the finished product, and to facilitate the manufacture thereof.
    The said invention consists in the improved mosaic and in the process of producing the same, all substantially as will be hereinafter set forth, and finally embodied in the several clauses of the claim.
    Referring to the accompanying drawings, comprised in three sheets, in which like letters of reference indicate corresponding parts in each of the several figures, Figure 1, Sheet 1, is a plan of a mosaic having projecting jewels, with a cast frame-work therearound, adapted to hold and holding the several parts secure together. Fig. 2 is a section view of the same. Figs. 3 and 4 are respectively a plan and section of a hollow or concaved mosaic, showing a projecting jewel which may be secured therein. Figs. 5 and 6 are respectively a plan and section of a flat roundel with a projecting jewel arranged in connection with pieces placed flush with the frame, and Fig. 6 illustrates a mosaic provided with strengthening-ribs formed on the frame-work. Figs. 8 and 9, Sheet 2, illustrate the arrangement of mineral pieces in molds, and Figs. 10, 11, and 13 illustrate certain processes in the manufacture of the mosaic. Fig. 12 shows a section of a mosaic with strengthening-ribs,
with the addition of wires cast therein. Fig. 14, Sheet 3, shows sections of a mold clamped together in a press. Figs. 15 and 16 are plans of mold or matrix sections adapted to cast a frame around projecting jewels, and Fig. 17 is a sectional view of said sections, showing said jewels therein. Figs. 18, 19, 21, 22, 23 and 24 illustrate a certain form of mosaic and a particular mold therefor. Fig. 20 is a section of a jewel in detail, and Figs. 25 and 26 illustrate certain strengthening-ribs overlapping the glass or mineral parts.
    In carrying out the invention, I arrange the several or many pieces or portions, a, of glass or other mineral plates, which go to make up the desired design, and which may be of any size or shape, between sheets, plates, or molds d, Figs. 8, 13, 14, 17, 22, of suitable material and construction, in such a manner as that each individual piece or portion shall be detached from those laterally adjacent, a passage or passages, b, being formed around said pieces or portions communicating with a supply-opening, c, lying between said plates close to the edges thereof. Through said supply-opening is poured the liquid metal, which, passing through the passages b and finally filling the same, hardens and forms a metallic frame-work, r, the parts of which are integral with one another. The sheets or plates d, pressing against the opposite faces of the glass or mineral parts, prevent the metal from covering the same, so that when the sheets or plates are removed the colors of the glass or mineral parts are exposed to view.
    The preferred methods of casting the frame-work around the portions of glass and the peculiar description of mosaics resulting from such methods I shall now more definitely describe.
    I arrange the glass or mineral portions or fragmentary plates a, glass being used when the mosaics are employed in windows or in other situations where it is desirable that light shall be allowed transmission, upon a table or surface m, Fig. 10, Sheet 2, upon which table may be marked or laid out the pattern of the desired design, to facilitate the adjustment of the plates. Said pieces are set at distances apart equal to the desired width of frame. Upon said pieces, and over the passages or interstices