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365,306 · Hyatt · "Vault-Covering, Illuminating-Tiling, &c." · Page 1
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Patents: 202 of 530

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Thaddeus Hyatt
67 of 67

SPECIFICATION forming part of Letters Patent No. 365,306, dated June 21, 1887.
Application filed September 21, 1886. Serial No. 214,199. (No model.)
To all whom it may concern:
    Be it known that I, THADDEUS HHYATT, of Brooklyn, Kings county, New York, have invented certain new and useful Improvements in Vault-Coverings, Illuminating-Gratings, &c., of which the following is a specification.
    My present improvement applies more especially to portions of the supporting frame-work which upholds the illuminating-gratings, and more particularly to the cross-bars or rafters which underlie the gratings, and which cross or span the spaces covered by the gratings. These cross-bars or rafters are generally made solid and either of uniform width throughout their length or "fish-bellied," and where they underlie and support the gratings the gratings are either made imperforate with a dead or solid strip or border which admits no light, or, if a row of light-holes occurs on the line of the bar, they are obscured by the bar and become useless as light-inlets, and are hence filled up with dead glasses or cement to cover and conceal the useless holes.
    Now, the object of my invention is to make the light-holes continuous over the whole grating, both over the bar as well as at the clear spaces or panels between the bars, and to obviate dead lines or borders over the bars and enable lines of light-holes directly over the bars to act as effective light-inlets.
    To these ends my invention consists, briefly, in forming the bars with gaps, notches, or openings directly under the light-holes, so as to admit the light through or across the edge of the bars without any serious obstruction, as hereinafter fully set forth.
    In the drawings annexed, Figure 1 gives a fragmentary plan view of illuminating-gratings or tile-work supported on one of my recessed or notched cross-bars. Fig. 2 is a plan view of the cross-bar itself, and Fig. 3 is a longitudinal section of Fig. 1. Fig. 4 is a cross-section on line x x of Fig. 1, and Fig. 5 is a cross-section on line y y. Fig. 6 is a perspective view of a complete supporting-frame formed with the improved cross-bars. Fig. 7 is a perspective view showing beams or rafters of curved form for supporting a curved rear extension-roof made according to my invention. Figs. 8 and 9 show modifications.
    Referring first to Fig. 6, A indicates the supporting-frame for the grating or tile-work, which is usually made with the horizontal rim a and vertical lip or flange b to retain the layer of cement with which the grating is over-laid when the work is complete. This frame is divided, as usual with a number of panels, by the cross-bars d d, and the panels are filled by the gratings B B, as shown in Figs. 1, 3, and 5, having openings f, in which glasses g are set, according to any of the usual systems in use.
    In the drawings I show a novel form of gratings and glasses, which form the subjects of a separate application; but my present improvement is not, of course, confined to such special forms. I also contemplate that the gratings shall be concreted or overlaid with cement flush with the top of the glasses and the top of the lip b on the frame, in the form shown in the drawings; but my present invention is not confined to concreted gratings, and may be applied to any class of gratings set with glasses and having underlying supporting bars or rafters.
    As shown in Figs. 1, 4, and 5, the gratings B, which fill and cover the panels in the frame, will meet and abut endwise on the cross-bars d, and the half light-holes in the abutting ends will meet together and form complete holes over the bars, as fully shown in Figs. 1 and 4.
    It will be seen that the order and arrangement of the light-holes in the gratings is such that they have a regular succession or continuity, both longitudinally of the bar and transversely of it, so that they are not spaced differently or omitted at the cross-bars, and hence the gratings have no dead-work lines or borders to overlie the bars, as has been common heretofore. The light-holes having, therefore, the regular and unbroken continuity shown, a line of light-holes will thus centrally overlie the line of the cross-bar, said holes being that line of holes which are bisected by the line of junction of the plates or gratings on the cross-bars. Now, in order to make this line of light-holes effective as light-inlets, I form the cross-bar with deep curved gaps or notches h h, on its top edge, coincident with the overlying light-holes, said notches being