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270,132 · Ross · "Illuminating-Tiling for Vaults, &c." · Page 2 Home  > Prism Glass  > Patent Index  > Page 2

270,132: 2 of 3

It may also be given a wedge shape or any other form desired. In all cases, however, it is broadened at the base so as to be wider than the opening in the frame. It will be seen at once that this lens must be inserted in the frame from the bottom. This is accomplished by holding the lens so that its flange will conform to the polygonal section of the opening, and then thrusting the main body up through the opening. The flange will pass up through above the seat, and then by giving the lens a slight turn in the proper direction the corner of the flange will be brought over the side portion of the inclined seats, and, at the same time, being forced up by the inclines, will draw the lower section of the lens up tightly against the bottom of the frame, thus securely fastening the lens in place. The position of the lens when thus secured in the frame will be seen at a in Fig. 1 of the drawings, in which the full lines represent the seat and the dotted lines the flange of the lens which turned upon the inclines to fasten it in place.     It will be seen that there is space for the seat between the flange on the lens and the broadened section below, this space being like a circular groove running around the lens. The space between the body of the lens and the sides of the opening is filled with cement, as usual, so as to make a water-tight joint.     Obviously more rays of light will pass down below the fame with a lens of the construction described above than in the old form, as represented in Fig. 6, for the lens there stops at the seat, and some rays of light will be obstructed by the portion below the resting-point of the lens.     With my improvement it is obvious that as the lens continues down through the opening, as shown in Fig. 3 of the drawings, the refraction of the light will continue through the opening, and so more light will pass below the frame than in the old form. It is also obvious that the enlargement of the lens below the frame provides for a continuation of the refraction of the rays of light and a better diffusion of these rays in the space below the frame.

In addition to the advantages named above, the tiling made under my improvement is much more durable, for the reason that the lens is fastened in the frame securely, without dependence upon the cement alone. In the old construction shown in Fig. 6 the lens D sets loosely upon its seat e in the frame E, and is held in place only by the cement F, surrounding it. A blow from below will readily loosen this lens but this defect is entirely remedied in my improvement, for it is obvious that the lens cannot be loosened without breakage, as it is fastened in the frame without any cement, so that it can be moved neither up nor down, and is held from turning by the cement afterward put in.     I do not limit my improvement to any special form of the lens-projection below the frame, nor to any particular number of sides for the flanges, as these are details of construction which may be varied without departing from the principle of my invention; and the enlargement of the lens below the frame may be employed with some other fastening device, though the one herein shown and described is expecially adapted to this purpose, and this fastening may in some instances be used without inclined faces.     Having this described my invention, what I claim as new, and desire to secure by Letters Patent, is--     1. In illuminating-tiling, the frame A, provided with opening B, with polygonal seats b, in combination, with the lens C, provided with polygonal flanges c, and a section, c', below the frame broader than the opening therein, substantially as and for the purposes set forth.     2. The polygonal seats b in the openings of the tiling-frame, having inclines b' on their upper faces, in combination with a lens, C, provided with a polygonal flange, c, and a section, c', below the framer broader than the opening therein, substantially as and for the purposes set forth. C. HANSEN ROSS. Witnesses:     GEORGE K. DAUCHY,     F. GEBHARD.