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286,542 · Hyatt · "Illuminating Vault-Covers or Grating-Tiles and Surfaces Made of the Same" · Page 2
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286,542: 2 of 4

seams between the plates, planks, or bars between the glasses, the figure being designed to illustrate specially a construction where the floor-plates are made of wood or wood material, and an area-covering construction.
    A indicates the floor plate, tile, grating, or glass-holder; a a, screw-threads in the sides of the light-holes; B, a glass, (seen in side elevation;) B', glass in section; e, bottom part of the glass; b b, screw-threads on the shank of the glass; c c, screw-threads, corrugations, or serrations above; f f, projections, stop, or shoulder on glass, to regulate its descent into the floor-plate. C indicates the concrete facing; D, mount of lead or material around the glass; d d, screw-threads, serrations, or corrugations on mount; E, border of the cast-iron foundation frame; F, cross-bars of foundation-frame; g g, lugs on the cross-bars, to fasten floor-plates to; h h, screws that take into the lugs.
    Like letters refer to like parts in all the figures.
    In carrying my invention into practice, I prefer to make use of an iron foundation-frame made, substantially in the way they are commonly constructed, of sections, and put together at the building where the work is to be laid. E F, Fig. 7, represent such a frame. The floor-plates, in the form of slats, planks, or long plates, are laid crosswise to and over the cross-bars in the manner of laying floor-plank in making floors of wood. The screws h pass through the illuminating strips or planks into the lags g g by being screwed to them, or they may be screw-bolts with nuts. After the floor-plates are all in place the glasses are applied and screwed into the matched half-holes at the junction-lines, as well as into the whole holes in the body of the plates or planks, and all being brought to a uniform surface-level, the facing of concrete is then troweled in, as shown at C, Fig. 7, which represents a portion of the work completed.
    Vault-covers or coal-hole plates I make substantially as represented by Fig. 7, an external cast-iron ring being employed as the border, but no cross-bars required, a ledge only being needed on the inside of the ring to fasten the perforated plate or slats to.
    What I claim as my invention, and desire to secure by Letters Patent, is--
    1. A concrete light, vault-cover, or construction composed of bars, slats, plates, planks formed with half-holes along the junction-edges, to give light, put together laterally or joined to make whole light-holes, and set with glass, in combination with a facing of non-slipping material-- hydraulic cement or concrete-- substantially as and for the purpose herein set forth and illustrated.
    2. A concrete light, vault-cover, or construction
wherein the floor plate or plates are made of wood or wood material and set with glasses, to give light, as set forth in my Patents No. 272,551, 1883, and No. 286,012, 1883, as aforesaid, in combination with an over-layer or facing of concrete put between the glasses, substantially as and for the purposes herein set forth and illustrated.
    3. A concrete light, vault-cover, or grating-tile wherein the floor-plate is made of bars, slats, plates, or planks formed with half-holes along the junction-edges, to give light, put together laterally or joined to make whole light-holes, when the holes of the same are formed with screw-threads, in combination with glasses screwed into the same, and a facing of non-slipping material-- hydraulic cement or concrete-- is put over the seams and between the glasses, substantially as and for the purposes herein set forth and illustrated.
    4. A concrete light, vault-cover, or construction wherein the floor plate or plates are made of wood or wood material and set with glasses, to give light, as set forth in my Patents No. 272,551, 1883, and No. 286,012, 1883, as aforesaid, when the holes of the same are formed with screw-threads, in combination with glasses screwed into the same, and a facing of non-slipping material-hydraulic cement or concrete is put over the floor-plate between the glasses, substantially as and for the purposes herein set forth and illustrated.
    5. A concrete light, vault-cover, or construction wherein the glasses are formed with screw-threaded shanks, in combination with one or more projections or a fillet made upon the glass to act as a stop, substantially as and for the purposes herein set forth and illustrated.
    6. A concrete light, vault cover, or construction wherein the glasses are set in mounts formed externally with screw-threads, corrugations, or serrations, in combination with screw-threads upon the shanks of the glasses for fastening them to the floor-plate, substantially as and for the purposes herein set forth and illustrated.
    7. A concrete light, vault-cover, or construction wherein the glasses are set in mounts formed externally with screw-threads, corrugations, or serrations, substantially as and for the purposes herein set forth and illustrated.
    8. A concrete light, vault-cover, or construction wherein the glasses are set in mounts formed to act as stops, substantially as and for the purposes herein set forth and illustrated.
    In testimony whereof I affix my signature in presence of two witnesses.
THADDEUS HYATT.
Witnesses:
    T. C. BRECHT,
    L. W. SINSABAUGH.