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Jacob Jacobs
24 of 57

SPECIFICATION forming part of Letters Patent No. 436,083, dated September 9, 1890.
Application filed March 9, 1889. Serial No. 302,593. (No model.)
To all whom it may concern:
    Be it known that I, JACOB JACOBS, of New York, in the county of New York, and in the State of New York, have invented certain new and useful Improvements in Illuminating-Tiles; 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 perspective view of the exterior and interior lenses separated from each other. Fig. 2 is a like view of the same combined and in position within a supporting-frame, and Fig. 3 is a section upon line x x of Fig. 2.
    Letters of like name and kind refer to like parts in each of the figures.
    My present invention is an improvement upon an illuminating-tile for which Letters Patent No. 364,113 were issued to me upon the 31st day of May, 1887, and is designed to remedy certain difficulties that have been encountered in the manufacture of said tile; to which end my said invention consists, principally, as an improvement in illuminating-tiles, in a lens having two recesses in it, in combination with a separately-formed lens fitted to and secured within the upper of said recesses, substantially as and for the purpose hereinafter specified.
    It consists, further, as an improvement in illuminating-tiles in which the light-openings are covered by lenses that are each provided with two recesses and combined with a separately-formed lens having a different color, said colored lens being contained within the upper of said recesses, substantially as and for the purpose hereinafter shown.
    In the carrying of my invention into practice I usually employ a metal tile A, in which the light-openings a and a are square and arranged in parallel lines, as shown, and each of such openings is provided around its lower edge with an inwardly-projecting supporting-ledge a'.
    Within each light-opening a is placed a correspondingly-shaped glass lens B, which substantially fills the space laterally, and is held in place therein by a cement joint C, that is made in the usual way between the inner walls of said opening and the outer sides of said lens. Within the upper side of the lens B is formed a recess b, which preferably
is round and extends downward about one-half the thickness of said lens, and within such recess is placed a second lens D, that corresponds thereto in size and shape, and is secured in place by a cement joint E, which is formed between its periphery and the wall of said recess. Either or both of the lenses B and D may be colored, and they are preferably formed from different-colored glasses, while the cement used for the joint E may also be colored, if desired, by which means the appearance of the tile both from without as well as from within is materially enhanced and beautiful effects rendered easy of production. When one of said lenses is made from uncolored glass, the light-transmitting capacity of the tile is but slightly diminished. The lower side of the lens B is preferably recessed, and the top of such recess b' is preferably made convex and ornamental, as shown in Fig. 5. As thus constructed it is found that the light-transmitting capacity of the combined lenses is but slightly less than in case of a single solid lens, and fully equal to the lenses shown in my hereinbefore-named patent, in which the outer lens had an open center, while in the construction of said outer lens the recessed form is much more easily made and costs less than does the open center form.
    Having thus described my invention, what I claim is--
    1. As an improvement in illuminating-tiles, a lens which has two recesses provided in it, in combination with a separately-formed lens fitted to and secured within the upper one of said recesses, substantially as and for the purpose specified.
    2. As an improvement in illuminating-tiles, a lens which has two centrally-disposed recesses arranged one above the other, in combination with a separately-formed lens placed within the upper recess, entirely filling the same, and having its upper face flush with the upper face of the inclosing-lens, substantially as and for the purpose shown.
    In testimony that I claim the foregoing I have hereunto set my hand this 2d day of March, 1889.