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272,383 · Hyatt · "Illuminating Vault-Cover or Grating-Tile and Surfaces Made of the Same" · Page 3 Home  > Prism Glass  > Patent Index  > Page 3

272,383: 3 of 13

of the kind represented by Figs. 10, 11, and 13, where d indicates the cellular or recessed face, this cellular space forming a sunk surface between the glasses that is continuous over all the tiles and joints between the tiles; and my improvement in the construction of illuminating concrete surfaces consists in fixing the glasses in the tiles at the works or manufactory, leaving them with a sunk surface to be filled up and finished at the building, the unfinished tiles being taken to the building and there made fast to the foundation-frame; and Fig. 8 represents the work at this stage, Fig. 9 representing it after the concrete face has been put on, the dotted face in Fig. 9 indicating concrete, and the broken lines across the face indicating the diagonal cross-bars of the frame below, that are not seen.     Figs. 10 to 16 refer wholly to concrete lights and glasses set in iron, by means of hydraulic or Portland cement and illustrate my improvements to make the glasses of this style of light as durable as the glasses of the cement and lead-band lights have proved to be.     Figs. 10, 10a, 10b, 10c represent a method where the glasses are fixed to the iron vault-cover or grating-tile, and made water-tight by means of sulphur-coal-tar cement, the upper section of the glasses standing clear of the face of the cover or tile, thus creating a sunk surface all over the plate between the glasses, for the reception of concrete. To secure the glasses from contact with the wet concrete when it is put on, each glass is encircled by the ring j. This ring I prefer to make of brimstone, which is hard and inelastic, and I prefer to run it hot around the glass before the concrete is put on, the ring remaining permanently in place; but the method represented by the figures represents a process where removable rings of metal or other material are employed, the brimstone ring being subsequently put in. Fig. 10 represents the cover or surface ready to receive concrete. Fig. 10a represents the same after the concrete has been put on. Fig. 10b represents the rings removed, leaving the annular channels k around the glasses. Fig. 10c represents the channels filled with brimstone l, poured in a fluid state around the glasses after the concrete has become hard.     Fig. 11 represents a cast-iron vault-cover or grating-tile, where the rabbeted seats for the glasses are made by the rings r, cast upon the cover or plate, the space d between the rings over the surface of the cover forming a sunk surface to receive concrete, the face of the glasses and tops of the encircling-rings r forming the level to be finished by the filling of concrete. My improvement on this description of cover or tile consists in setting the glasses within the rings r by means of a cement composed of brimstone and coal-tar, poured while in a hot and fluid state around the glasses; also making such covers (when for use as tiles to be combined into extended surfaces) without

dead borders and rims at the edges, the sunk face d between the rings r extending to the very edge of the plate, so that when any number of such plates are joined together the sunk surface becomes continuous over the whole face of the work.     Figs. 12 and 13 represent a cast-iron vault-cover or grating-tile faced with concrete before the glasses are fixed, the concrete itself forming the light-holes and rabbeted seats for the glasses in part or whole-in part as shown in Fig. 12, where the bottom of the seat is iron, n, and the sides concrete m, and wholly as represented in Fig 13, where the seat m n is concrete. My improvement, as illustrated by Figs. 12 and 13, consists in the mode of facing cast-iron vault-covers or grating-tiles with concrete and fixing the glasses, for instead of placing the glasses over the light-holes, as is commonly done, and then adding the concrete, the glasses serving as cores for molding the plastic concrete around, I employ "sand cores" or other cores for the light-holes and mold the plastic concrete around such cores within a proper "flask," somewhat after the manner of casting iron in a flask to make cast-iron gratings or vault-covers to be afterward set with glass, as in cement-light making. The product of this process is a concrete grating, the bottom iron and the top concrete, with proper rabbeted seats, like an iron casting, for the glasses. When the concrete has become sufficiently dry and hard, the glasses are then put in place and fixed by pouring hot coal-tar-sulphur cement around them, as in common cement-light work, and glasses combined with concrete by this method will be as durable as though the grating or cover were wholly of iron, as are the gratings of the cement-lights.     Fig. 14 differs from Figs. 12 and 13 in being an actual stone grating regularly cast out of concrete, as iron gratings are cast in molds or flasks, the metal being tie metals that give to the concrete in compression the tensile strength of the metal. This sort of a grating having been already patented by me, my improvements in it now consist in casting the grating with rabbeted seats and fixing the glasses in such seats by means of coal-tar-sulphur cement poured around the glasses in a hot and liquid state while the glasses are in the seats of the grating, the fluid cement making a water-tight joint with the concrete sides of the seat when the concrete is sufficiently dry; and when it is not I then employ glasses that have been previously belted with brimstone or with a mount made of coal-tar-sulphur cement, as represented by Figs. 16 and 17, such mounted glasses being readily attached to the green concrete by hydraulic grout. The same is true, also, of the cover represented by Figs. 12 and 13, the same method being applicable to them when the concrete face is green. When the stone gratings are designed for making illuminating-surfaces, as represented by Fig. 8, and also when the concrete-faced gratings