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603,799 · Sullivan · "Illuminating-Lens for Sidewalks" · Page 1
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Patents: 462 of 511
UNITED STATES PATENT OFFICE.
EUGENE J. SULLIVAN, OF RIVER FOREST, ILLINOIS, ASSIGNER TO THE
BROWN BROTHER MANUFACTURING COMPANY, OF CHICAGO, ILLINOIS.

First: D27,402 · Sullivan · "Design for a Lens for Skylights, &c." · Page 1 Last: 603,799 · Sullivan · "Illuminating-Lens for Sidewalks" · Drawing 2 Prev: D27,402 · Sullivan · "Design for a Lens for Skylights, &c." · Page 1 Next: D27,402 · Sullivan · "Design for a Lens for Skylights, &c." · Page 1 Navigation
Eugene J. Sullivan
2 of 2
ILLUMINATING-LENS FOR SIDEWALKS.
SPECIFICATION forming part of Letter Patent No. 603,799, dated May 10, 1898.
Application filed April 5, 1897. Serial No. 630,895. (No model.)
To all whom it may concern:
    Be it known that I, EUGENE J. SULLIVAN, of River Forest, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Illuminating-Lenses for Sidewalks; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.
    This invention relates to improvements in illuminating-lenses for use in sidewalks, vaults, skylights, and other like places, which are adapted to be mounted in suitable frames to transmit rays of light to the space inclosed by said frame.
    The object of the invention is to provide an improved construction in devices of this character by which the same will have high dispersive power and will be capable of distributing the transmitted rays of light uniformly in all parts of the space to be illuminated.
    The invention consists in the matters hereinafter set forth, and more particularly pointed out in the appended claims.
    In the drawings illustrating my invention in one form, Figure 1 is a perspective view of a tile or lens embodying my invention. Fig. 2 is a front elevation of the same. Fig. 3 is a rear elevation thereof. Fig. 4 is a bottom plan view thereof. Fig. 5 is a section of a frame showing two lenses embodying my invention mounted therein, said lenses being shown in side elevation. Fig. 6 is a plan view showing a fragment of a plate, such as a vault-cover, containing a plurality of lenses mounted therein.
    In said drawings, A designates a metal supporting frame or plate provided with a plurality of openings or sockets within which are adapted to be mounted my improved lenses B. For this purpose the plate is provided with ledges or flanges A', surrounding said openings at the lower sides thereof and upon which the lenses rest when in place therein.     The lens herein shown is cast or molded in one piece, and consists of a top or body portion B' and a relatively long depending leg B². Said top or body portion B' is herein
shown as made of hexagonal shape; but said shape is not essential, as the lens may be made of any form, as seen in plan view, which is found most desirable. Said body portion is provided between its upper and lower surface with a marginal flange B³, which is shown as entirely surrounding the same and which will desirably be of the same shape as the body portion B'. Said flange is adapted to rest upon the ledge A' of the plate and serves to support the lens within the plate, said flange being herein shown as made of considerable thickness to enable it to support any weight which may be brought thereon. Said body portion B' will be made of such width in its part below the flange B² as to fit loosely between the inner edges of the ledges A' of the frame to provide for the expansion and contraction of said metal plate under varying temperatures. As herein shown, the distance between the lower surfaces of said flange B³ and the upper surface of the lens is such that when in place in the plate A the upper surface of the lens will be exactly flush with the upper surface of the said plate. This will be a desirable construction when the lens is used in sidewalks or like places, but will not be essential when employed in places not designed to serve as a walk, such as vault-walls and the like.
    When said lenses are placed in the plate, as shown in Fig. 5 of the drawings, the space between the outer edges and the frame will be filled in with a filling of cement C to prevent accidental displacement of the lens. The intermediate parts of the plate between the lenses will desirably be terminated below the top surface thereof, so as to afford space for a larger body of cement to thereby secure additional strength. The flanges are herein shown and will desirably be made of greater diameter in their lower than in their upper parts, which will increase the horizontal bearing-surface between said cement and flanges and thereby serves as an additional means to prevent vertical movement of the lenses within their seats.
    The depending leg B² has, as seen in side view, the form of a right-angled triangle, the front surface b forming the perpendicular of