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257,712 · Hyatt · "Constructing and Repairing Illuminating-Roofs, &c." · Page 1
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Patents: 129 of 511

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Thaddeus Hyatt
45 of 67

SPECIFICATION forming part of Letters Patent No. 257,712, dated May 9, 1882.
Application filed April 14, 1882. (No model.)
To all whom it may concern:
    Be it known that I, THADDEUS HYATT, a citizen of tile United States, and a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Constructing and Repairing Illuminating-Roofs and Roof-Pavements, of which the following is a specification.
    In the drawings attached hereto and making part of this specification, like letters refer to like parts in all the figures.
    Figure 1 represents a foundation-grating, the openings of which are meant to be each about one foot square. A, the grating; a, main bars at the sides of the grating; a', intermediate main bars; b, cross-bars at the ends of the grating; b', intermediate cross-bars; c, lugs cast upon the under side of the main side bar, a, to underlap and give support to the abutting cross-bars of an adjoining grating, Fig. 1 being an end or starting grating.
    Fig. 2 represents a foundation-grating, A', made to match A, Fig. 1, and formed with an open side of abutting cross-bars designed to be supported at their ends upon the underlapping lugs c of the adjoining grating A. Fig. 3 represents the two gratings A and A' united, and illustrates the invention of grating A formed with the lugs c, in combination with grating A' formed with an open side of abutting cross-bars, the result being a combined grating, A A', having the appearance of a single casting, the line of dead material a'' a'', where the two gratings meet, being no thicker than the intermediate parallel bars, a' a', of the gratings.
    Fig. 4 represents several features of the invention, viz: first, in the form of a curved foundation-grating for making rear-extension roofs; second, as a foundation-grating formed with ventilating-scuttles, and, third, as a concreted foundation-grating. B shows the ventilating-scuttles; d, curbs around the scuttles; e, hinged cover to scuttle; the dotted surface indicates concrete. C, concrete illuminating-gratings or quarry glass holders cemented to the foundation-grating by a bond of hydraulic cement.
    Fig. 5 represents a foundation-grating cast in stoop and step shape for making illuminating area-coverings.
    Fig. 6 represents a hand-size illuminating-grating or quarry glass holder designed for closing the openings of foundation-gratings in constructing illuminating rear-extension roofs and area-coverings, the quarry being formed with no dead material at the borders, the sides f of the glasses D being bare at those points.
    Fig. 7 represents a concrete quarry glass holder formed with no dead border.
    Fig. 8 represents a quarry set with glasses formed with shoulders that rise above the face of the quarry. D shows the glasses; g, shoulders or surplusage of the glasses shown in Fig. 9.
    Fig. 9 is a cross-section of Fig. 8, designed to show the necks or surplusage of the glasses, one of the glasses being shown by itself.
    Fig. 10 represents a foundation-grating, two of the openings of which are closed by quarries set with shouldered glasses. The dotted surface of the construction represents a facing of concrete put between the shoulders of the glasses and over the grating.
    The object of my invention is to make patent light-work not liable to leak, to prevent sweating, to obtain ventilation by simple and inexpensive means, and to make the work handsomer and cheaper than heretofore.
    Figs. 1, 2, 3, and 6 illustrate the essential features of my invention as a new system of illuminating construction.
    The main feature of the system consists in employing two sets of gratings, one within the other, for the construction of illuminating-roofs and roof-pavements, the larger gratings representing the mechanical strength of the roof or pavement, and taking the place of the rafters or supporting-bars of the old construction, and the smaller gratings (being the glass-carriers) representing the weather-surface of the constructions. The larger gratings I call "foundation-gratings," and the smaller gratings I call "illuminating-quarries." The most prominent feature of the system as a result of the double-grating construction is its monomorphous character. This feature is illustrated by Figs. 3 and 9, where a number of glass-set quarries are combined with foundation-gratings in a way to make the construction appear like a single casting.
    The new features of the foundation gratings