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Patents: 464 of 511
UNITED STATES PATENT OFFICE.
JACOB JACOBS, OF BROOKLYN, NEW YORK.

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Jacob Jacobs
52 of 57
VENTILATING VAULT-COVER.
SPECIFICATION forming part of Letter Patent No. 606,554, dated June 28, 1898.
Application filed December 31, 1897. Serial No. 664,931. (No model.)
To all whom it may concern:
    Be it known that I, JACOB JACOBS, of Brooklyn, in the county of Kings, and in the State of New York, have invented certain new and useful Improvements in Ventilating Vault-Covers; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, in which—
     Figure 1 is a vertical section through a vault-cover embodying my invention. Figs. 2 and 3 are perspective views of the ventilating device, showing the same closed and open, respectively. Fig. 4 is a bottom view thereof closed, and Fig. 5 is a detail view in section on the line x x of Fig. 2.
    Letters of like name and kind refer to like parts in each of the figures.
    The object of my invention is to provide a light-transmitting ventilating-cover for vault-openings that will be perfectly water-tight when in a closed position; and to this end said invention consists in the illuminating and ventilating vault-opening cover, having the features of construction substantially as hereinafter specified.
    In the carrying of my invention into practice I place within the vault-opening a ring A, having around its upper edge a horizontal annular flange a to rest on the masonry or brickwork at the edge of the hole and having a circumferential groove or rabbet to form a seat to support a circular open-work or perforated cover-plate B, with its top surface flush with the surface of the walk or pavement. At its lower edge the ring has an inwardly-turned annular flange a', from the inner edge of which rises an annular vertical wall or curb , the space between the latter and the ring A being a gutter or channel for water, which is passed off therefrom through an opening in the flange a', that communicates by means of a pipe C with a sewer or other place of discharge.
    Resting upon the upper edge of the wall or curb is a ring or band D, that has a vertical flange d, which fits over said curb, and to said ring D is attached the outer ends of a number of substantially equidistant bars or rails E and E, that extend in radial lines from a small circular center piece or ring F.
Alternate spaces between the bars E and E are open, and each of the others is glazed by a segment-shaped piece of glass G, that has each of its opposite sides contained within a groove in the side of a bar formed by two parallel horizontal flanges g and g, the joints between the glass and bars being puttied or cemented to render them water-tight. Each bar E is extended vertically well above the top flange g to prevent the passing of water across into the adjacent open or unglazed space.
    Extending through the ring F, at the center thereof, is a vertical shaft H, that, at its upper end is connected to a spider or frame formed of a hub I and a series of radially-extending bars K and K, corresponding in number and position with the bars E and E beneath. The hub I rests upon the upper end of the ring F and has an annular flange i at its edge, that encircles said ring. The lower end of the ring is engaged by a disk or plate I', fastened to the shaft H, and thereby the spider is retained in position against vertical movement. Alternate spaces between the bars K and K are left open and the remainder filled with segment-shaped pieces of glass L and L, each piece being supported between a pair of bars by an inwardly-projecting flange k on each of the bars and there secured and a tight joint formed by putty or cement. The outer end of the flange is bent upward and then inward over the outer end of the piece of glass.
    By the partial revolution of the shaft H, by means of a handle h thereon, the plates of glass L and L may be moved into position directly over the open spaces below them, so as to cover them, or to one side of said spaces, so as to leave the same open, and thus prevent or permit the passage of air. To limit said movement of the glasses L and L, so that their position shall be such as to exactly cover or completely uncover the openings beneath, one of the bars K and K of each glass-supporting pair is projected downward sufficiently far to encounter when moved in either direction the upwardly-projecting parts of the pair of bars E and E, between which the subjacent plate of glass L is supported. Moreover, when in a closed position the