Up: Patent Index

365,306 · Hyatt · "Vault-Covering, Illuminating-Tiling, &c." · Page 2 Home  > Prism Glass  > Patent Index  > Page 2

365,306: 2 of 5

preferably deeply beveled on each side of the bars, as seen in Figs. 3, 4, and 6, so that the, rays of light are thus readily admitted from the glass over said bar in slanting lines on either side thereof, as indicated by the rays in Figs. 3, 4, and 5. This construction thus renders the line of light-holes over the cross-bars almost equally as efficient as any other line of holes, and at the same time preserves a uniform appearance all through the tile-work at the top or exterior of the same, and gives the effect of one continuous uniform panel or grating, which are very important advantages in illuminating tile-work. In addition to these is advantages, it follows that, since my improved cross-bars do not materially obstruct the light, a greater number of cross-bars can be used than heretofore, thus imparting much greater strength and rigidity to the structure, and which is particularly desirable where concrete is used as an over-layer, whereas heretofore the bars have been as few as possible and placed as far apart as practicable, in order not to obstruct the light-holes, thus tending to weaken the structure.     By reference to Figs. 2, 3, and 6 it will be noted that the cross-bars are formed with a secondary series of smaller notches, or rather recesses, k k, between the main notches h, which correspond to the lines of light-holes which are next adjacent to those which overlie the bars, as seen in Fig. 1, and which are formed where the circle of the light-hole cuts or runs tangent or secant to the bars, thus removing the metal of the bar slightly on each side, so as to give the adjacent lines of light-holes their full light-admitting value, as will be understood.     It will be seen on reference to Figs. 1 and 5 that the gratings which abut or junction on the cross bars are fastened thereto by counter-sunk-headed screws m, which are screwed into the cross-bar and the heads of which bear jointly on the abutting sections, which are formed with bisected screw-holes to receive said heads, as will be understood from Figs. 1 and 5, thus fastening both gratings to the bar by one line of screws. This feature I have, however, claimed in a separate application filed the same date as this.     It will be understood that the underlying notched bars d may be formed separately from any frame and may be suitably secured to the walls, girders, or other parts for supporting the gratings; but I generally prefer to form a continuous cast-iron frame having a series of the notched cross-bars formed integral therewith, as seen in Fig. 6.     The cross-bars may be formed separately in wrought or cast iron for rear extension-roofs, as shown in Fig. 7, in curved, arched, or other suitable forms, in which case one end will generally be supported on the back wall, n, while the other end is bolted to a girder, p, which rests at each end on the side walls of the building, as will be understood from Fig. 7.     Many other obvious forms and arrangements

of the improved cross-bars will readily suggest themselves, as they may be used in any situations where the common bars are now used, and in many other places where such bars would not be admissible, and I do not of course limit myself to any particular shape or situation of the bars.     It will be seen that the essential principle of my invention is to isolate the top edge of the supporting-bars from the under side of the gratings at points coincident with the overlying light-holes, so as to allow free inflow of the light slantingly over the edge of the bars, with points of support extending between the isolating spaces from the bars to the gratings, or vice versa; hence the bars may be made, as shown in Fig. 8, with small posts or feet m rising therefrom to support the gratings at points between the light-holes, and the isolating spaces or gaps h between the posts m will admit the light with the same effect as the notched bars shown in the other figures. To reverse this, the gratings may be formed with the feet or posts m, as shown in Fig. 9, extending from the under side at points between the light-holes, which feet will rest on the straight top edge of the bar, and be secured thereto, thus leaving isolating spaces h between the points of support under the light-holes with the same effect as in the other constructions.     What I claim is--     1. In illuminating tile-work, the combination, with an overlying metallic grating and glasses set in the openings thereof, of underlying supporting-bars, isolated at the top edge from the gratings at points beneath the light-holes and glasses, with points of support extending between the bar and gratings, and arranged between the isolating spaces, substantially as and for the purpose set forth.     2. In illuminating tile-work, supporting-bars underlying the gratings beneath lines of light-holes having gaps, notches, or openings coincident with said light-holes to admit the light from said holes without material obstruction, substantially as shown and described.     3. In illuminating tile- work, supporting-bars underlying the gratings beneath lines of light-holes having gaps or notches in its upper edge coincident with said light-holes, and beveled on the sides whereby the light is admitted freely in slanting lines across the edge of the bar and down its sides from said light-holes, substantially as shown and described.     4. In illuminating tile-work, the combination, with gratings having series of light-holes arranged in regular succession and uniform continuity, of a supporting bar or bars under-lying the grating beneath one line of holes, having its edge formed with light-admitting gaps, openings, or notches coincident with said holes, substantially as set forth.     5. In illuminating tile-work, the combination, with sectional gratings adapted to junction end to end, and having half light-holes on said end which are completed when the sections are junctioned, of supporting-bars