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588,725 · Bruner · "Illuminating Area-Spanning Pavement" · Page 2 Home  > Prism Glass  > Patent Index  > Page 2

588,725 : 2 of 4

H indicates the lenses, which are formed with lateral flanges at their lower edges, which flanges are either recessed or formed with projections to cooperate with converse recesses or projections on the molds, whereby when the molds are in position and the lenses are placed over the openings g with their recesses or projections engaging converse parts of the mold a regular alignment of the lenses is preserved with little danger of its being broken in the laying of the composition material between the molds and around the lenses. This lateral flange around the bottom edge of the lens also serves as a support for the lens in the composition material, as is obvious.     The rows of sectional molds may be spaced by measurement to determine the width of the ribs, as when the area-way is curved and it is desired to have the lenses radially disposed, as shown to the left of Fig. 2, or the molds may be spaced by a removable templet I, (shown in Fig. 2;) but I prefer to employ a permanent templet and strengthening-bar J, as shown in Fig. 2. This strengthening-bar and templet is preferably arranged between each line of molds, and where it is to be permanent I prefer that it should be supported at its ends, as shown in Fig. 1.     In constructing a pavement of this class, the ground supports D, E, and F being in position, the floor of studding is laid as shown. The sectional mold-boxes are now placed in position on this floor and, if templets are to be used, the mold-boxes are placed according to the templets. The lenses are now arranged upon the mold-boxes and the composition material laid between the molds, around the lenses, and upon the templets, if any are used. When the composition material has set, the ground supports D, E, and F are taken away, which permits the flooring to fall. A light blow struck upon the molds, or rather a succession of light blows struck by a small hammer, will loosen the molds, so that they may be easily removed without the use of levers, as has heretofore been employed in all substructures of which I am aware. Upon the removal of the molds the pavement is finished. I might add that molds such as shown in Fig. 5 and to the right of Fig. 1 are identical in construction as the molds shown in Figs. 3 and 4, with the exception that they are much shorter and are adapted to be used in spaces where the regular size molds will not fit.     From the above description it will be seen that when it is desired to span any width within the limits of strength of the composition to sustain the floor-loads the mold-boxes can be used without requiring special lengths to be cut, as has heretofore been the practice where wooden beams were employed. The mold-boxes being arranged end to end enables the train to be made any length, each mold-box or section being a "unit," as it might be termed, so many units being employed to construct the entire line.

So far as I am aware I am the first to employ short sections of independently-movable mold-boxes designed to be arranged end to end to form an unbroken line of individual or disconnected mold-boxes, thus dispensing with the use of wooden beams, which are objectionable for many reasons, chief among which are, first, cost, loss of material in cutting to fit different work, and unreliability as to result, the material adhering thereto and the ribs of the pavement cracking and breaking when the beams are removed. By arranging short sections end to end and spacing the lines so formed by templets no locking or connection between the sections is necessary. In fact, it is desirable that these boxes be independent of each other and remain as individuals, because they are easier to remove from the cavities, requiring no disconnection in such removal, and, being taken out separately, there is no danger of fracturing the pavement-ribs because of the short lengths of the sections.     I am aware that many minor changes in the construction, combinations, and arrangements can be made and substituted for the parts of my invention without in the least departing from the nature and principle thereof.     Having thus described my invention, what is claimed as new, and desired to be secured by Letters Patent, is—     1. The combination with removable supports, of disconnected mold-boxes arranged thereon, said mold-boxes being formed in short lengths or sections which are independently movable, said sections being arranged end to end to make an unbroken line; substantially as described.     2. The combination with removable supports, of disconnected and independently-movable hollow mold-boxes arranged thereon, end to end, to form an unbroken line, and lenses arranged on said boxes; substantially as described.     3. The combination with removable supports, of disconnected and independently-movable hollow mold-boxes arranged thereon, end to end, to form an unbroken line, lenses arranged on said boxes, and means for holding said lenses in position on said boxes; substantially as described.     4. The combination with removable supports, of disconnected and independently-movable hollow mold-boxes arranged thereon, end to end, to form an unbroken line, said boxes being open at their bottoms and having openings formed in their tops, lenses arranged over the openings in the tops of the boxes, and means for holding said lenses in place over said openings; substantially as described.     5. The combination with removable supports, of disconnected and independently-movable hollow mold-boxes arranged thereon, end to end, to form an unbroken line, templets between said lines, to space them properly,