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458,849 · Jacobs · "Illuminating-Tile" · Page 2 Home  > Prism Glass  > Patent Index  > Page 2

458,849: 2 of 4

surface of an annular rib b4, projecting below the face of the part of the lens which is to rest upon the tile-frame ledge a. With the described concavity on the lens-bottom, the round-surfaced rib b4 projecting down through the light-opening in the frame, and the rounded ribs b² b² in the lens side I can secure a thorough distribution of the light passing through the lens. By an illuminating-tile containing lenses with such features illumination not only of the space immediately below the tile, but also that extending in all directions beyond the closed opening, can be obtained.     The form of lens which I prefer with its scallop-edged top, besides securing the desired distribution of light, also gives the tile an ornamental and attractive appearance, as will be seen from Fig. 1 of the drawings.     The shape of the lens with the rounded ribs b² b² projecting successively farther and farther outward as the bottom of the lens is approached, makes the molding of the improved form simple and easy, so that the finished article need not be any more expensive than the ordinary and well-known ones heretofore used in illuminating-tiles.     Having thus described my invention, what I claim is--     1. A lens for illuminating-tiles, having its side periphery provided with a series of ribs of which each lower one projects out beyond the one next above it, substantially as and for the purpose specified.     2. A lens for illuminating-tiles, having its bottom made concave and provided with an annular downwardly-extending rib around the concavity and having its side periphery provided with a series of ribs, of which each lower one projects out beyond the one next above it, substantially as and for the purpose set forth.

3. A lens for illuminating-tiles, having the lower portion to be received and supported within the light-opening in a tile-frame, its upper portion formed so as to have a scalloped outline, and its side periphery provided with rounded ribs, of which each lower one projects out beyond the one next above it, substantially as and for the purpose described.     4. A lens for illuminating-tiles, having its lower portion adapted to fit within a light-opening in the tile-frame, its top with scalloped outline, and its side periphery having the series of ribs scalloped like the top, of which each lower one projects out beyond that next above it, substantially as and for the purpose specified.     5. An illuminating-tile in which the light-openings contain lenses, each having its side periphery provided with a series of ribs projecting farther outward as the bottom of the lens is approached, substantially as and for the purpose described.     6. An illuminating-tile in which the light-openings in the frame are provided with lenses having tops made smaller in diameter than the bottoms and their side peripheries provided with ribs, of which each successively lower one projects beyond that above it, substantially as and for the purpose set forth.     7. An illuminating-tile in which are lenses having the upper portion of their bodies provided with numerous peripheral scallops, whereby the reflecting capacity of the lens is augmented, substantially as and for the purpose specified.     In testimony that I claim the foregoing I have hereunto set my hand this 14th day of January, A.D. 1891. JACOB JACOBS. Witnesses:     FRANKLIN LYNCH,     GEO. W. TICE.