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Patents: 204 of 530	UNITED STATES PATENT OFFICE JOHN W. MARK, OF NEW YORK, N. Y. ILLUMINATING-TILE.	John W. Mark 1 of 8
SPECIFICATION forming part of Letters Patent No. 369,196, dated August 30, 1887. Application filed May 25, 1887. Serial No. 239,334. (No model.)

To all whom it may concern:     Be it known that I, JOHN W. MARK, of New York city, in the county of New York, and in the State of New York, have invented certain new and useful Improvements in Illuminating-Tiles; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which--     Figure 1 is a perspective view of my tile before the lenses are inserted. Fig. 2 is a like view of the same with the lenses in place. Fig. 3 is a section upon line x x of Fig. 2, and Fig. 4 is a like view of the same with the tile constructed in two parts.     Letters of like name and kind refer to like parts in each of the figures.     The object of my invention is to so construct an illuminating-tile as to secure a maximum amount of lens area without impairing the strength of the structure; and to such end said invention consists, principally, in an illuminating-tile which is provided with round light-openings that are each surrounded by an annular curb, which intersects and forms part of each of the adjacent curbs, whereby the space between the light-openings is reduced to a minimum, substantially as and for the purpose hereinafter specified.     It consists, further, in an illuminating-tile which is provided with round light openings that are surrounded by annular intersecting curbs, and between such curbs is provided with recesses for the reception of cement, tiles, or glass or other like material, substantially as and for the purpose hereinafter shown.     It consists, further, in an illuminating-tile which is composed of a base having circular light-openings and a superimposed body that is formed by annular intersecting rings, which constitute curbs for the light-openings, and are each adapted to receive and contain a lens, substantially as and for the purpose hereinafter set forth.     It consists, finally, in an illuminating-tile which is provided with round light-openings that are surrounded by annular intersecting curbs, and between such curbs is provided with recesses, in combination with lenses which are secured within said curbs and with a cement, glass, or tile filling for said recesses,

substantially as and for the purpose hereinafter shown and described.     In the carrying of my invention into practice I employ a metal tile, A, that is provided with a series of round light-openings, a and a, each of which openings is surrounded by an annular curb, a', that interiorly has a larger diameter than its opening, so that at the lower end of said curb there is formed by the upper face of said tile an inwardly-projecting ledge, a².     The curbs a' and a' have their intersecting sides joined together, and at their points of intersection have only the thickness of a single curb, by which construction the space between contiguous light-openings a and a is reduced to a minimum, and the tile is given a maximum illuminating capacity, while the strength of the structure is materially greater than would be possible were said curbs separate from each other instead of being joined. Said tile and curbs are preferably cast together; but for some purposes may be formed separately and united by screws B and B, as shown in Fig. 4.     Within each curb a' is placed a lens, C, which rests upon the ledge a², and is secured in place in the usual manner by means of cement D, that is placed within the space between its periphery and said curb. Between each four of said curbs is left a recess, a', that is preferably filled with a cement, D, plain or colored, but may, if desired, be filled with a fancy tile or glass bedded upon cement; but in either case such filling should come flush with the upper edges of the curbs, so as to constitute part of the walking-surface of the illuming-tile and to afford a firm bearing for the feet.     Having thus described my invention, what I claim is--     1. An illuminating-tile which is provided with round, light-openings that are each surrounded by an annular curb, which intersects and forms part of each of the adjacent curbs, whereby the space between the light-openings is reduced to a minimum, substantially as and for the purpose specified.     2. An illuminating-tile which is provided with round light-openings that are surrounded by annular intersecting curbs, and between such curbs is provided with recesses for the reception of cement, tiles, or glass, or other