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20,721 · Leonard & Jackson · "Illuminating-Cover for Vaults, &c." · Page 1
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Patents: 24 of 530

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Peter H. Jackson
1 of 14

Specification of Letters Patent No. 20,721, dated June 29, 1858.
To all whom it may concern:
    Be it known that we, ELIJAH P. LEONARD and PETER H. JACKSON, of the city, county, and State of New York, have invented, made, and applied to use certain new and useful Improvements in Lights for Vaults, Decks of Vessels, in Sidewalks, Pavements, Roofs, &c.; and we do hereby declare that the following is a full, clear, and exact description of the construction thereof and the nature of our invention, reference being had to the annexed drawing, making part of this specification, wherein--
    Figure 1, is a plan and Fig. 2, a vertical section of our said invention, as applied to a frame for receiving two flat glasses, one of which is detached and shown separately in Fig. 3.
    Similar marks of reference denote the same parts.
    The front portion E, of my improved riser is a metallic plate which has a series of parallel rows of apertures d d, formed or cast therein substantially as represented in Figs. 1, and 3.
    Deck lights for vessels, and lights in floors have heretofore been made of glasses of various sizes, shapes, and thicknesses, and the same have been used either separately or two or more together; and have been contained in metal, or wood frames; and in a metallic rim or vault cover. But the pieces of glass used were of large size, and for the purpose of giving strength, as they were supported at the edges or circumference only, were necessarily made of great thickness, and thereby the light was very much obscured; subsequently vault lights were made by a metallic plate perforated and thus receiving many small glasses, or lenses of glass, supported by their edges only, upon said metallic plates, which said metallic plates were cast with knobs as part thereof, and rising above them. The effect of this mode of construction was that numerous joints were made that could not conveniently be kept tight, and also that but little light comparatively was admitted; our object has been to dispense with metallic plates, and to discover a mode of using larger and thinner surfaces of glass, and supporting the same beneath in such a manner that they would be safe, and sufficiently secure to bear the weight of travel and support, when necessary, heavy burdens, while at the same time a larger space and more free passage for light would be given, and the whole made tight and water proof.
    Our invention does not consist in the use of any particular size, shape or thickness of glass or in multiplying the number of lights so as to have several lights in one frame, but it consists in the manner of using plates of glass, for pavements, vault lights, deck lights, floors, &c. and the manner of supporting and sustaining the same from beneath. We prefer the use of perforated plates of glass, and have described the mode of using this more particularly in our specification.
    In the drawing we have shown a light to be applied in a deck, floor, platform, steps, vault cover, or other desired position, and either separately, or where several are contiguous to each other, or more or less remote, and contained in a wooden or metal sash, or frame work and the glass itself we prefer to be about eight inches square, but the same may be any other size or shape adapted to the peculiar circumstances.
    a is the framework around the glass b in which glass holes are formed at suitable distances apart and passing through said glass.
    c, c are cross bars beneath the glass b, passing from one part of the frame a, to the other, and said cross-bars occupy such a position in relation to the holes in the glass, as to be immediately below said holes, and at a more or less distance below the glass, or said glass may rest upon the upper surface of said bars c, their entire length or only at intervals.
    d, d, are thimbles or pins from said crossbars c, c, passing through the aforesaid holes in the glass, and rising sufficiently above the surface of the same to to give a foothold to persons walking over the same and prevent slipping or falling on the smooth surface of the glass. These thimbles or pins are to be formed of the desired size and shape, and may be either formed on the bars c, c, or rest thereon, although we prefer to use such thimbles of pins as are shown in the drawing, with a head 1 above the glass, and a screw 2, passing through the bar c, with a nut 3, below as by this construction, the glass is bolted into place in the frame, to secure the same to the cross-bars, or said thimbles or pins might be formed on the cross bars c, and the glass slipped over them, at the same time suitable cement is to be inserted within the holes in the glass, and also beneath the head 1, to make the parts water-tight, and small washers, or strips of rubber or other material, may be used between the bars c and the under side of the glass either the whole length of the bar or only at intervals.