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317,945 · Hyatt · "Concrete Light for Buildings, Areas, &c." · Page 1 Home  > Prism Glass  > Patent Index  > Page 1

317,945: 1 of 4

Patents: 182 of 530	UNITED STATES PATENT OFFICE THADDEUS HYATT, OF BROOKLYN, NEW YORK. CONCRETE LIGHT FOR BUILDINGS, AREA, &c.	Thaddeus Hyatt 66 of 67
SPECIFICATION forming part of Letters Patent No. 317,945, dated May 12, 1885. Application filed April 7, 1885. (No model.)

To all whom it may concern:     Be it known that I, THADDEUS HYATT, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Concrete Lights for Buildings, Areas, &c., of which the following is a specification, reference being had therein to the accompanying drawings.     My invention relates to the manufacture of "concrete lights" for construction purposes, made in the form of "tiles," (including both the "one-casting" and the "combination tile,") and for the closing of coal-holes in sidewalks, made in the shape of "vault-covers." As commonly made the concrete or cement is keyed to the face of the perforated plate or grating by means of under-cut ribs or fillets cast upon the face of the plate, or by means of a cellular mesh cast thereupon; and the glasses are confined therein by the over-layer of cement, or the glasses, prior to the application of the plastic cement facing, are either cemented within rings cast upon the face of the plate or cemented directly within the light-holes of the grating by means of an entering neck or shank upon the glass that goes into the openings, after which the concrete facing is put upon the grating.     The object of my invention is to save the cost of the cellular net-work and fillets on the face of the grating and to avoid the labor of fixation incident to cementing the glasses in position preliminary to the application of the plastic facing.     My invention consists in a perforated plate or grating made with bayonet-slotted light-holes, and glasses formed to interlock with the same, in combination with a plastic or concrete facing that, when hardened, fixes the glasses permanently in place, the sides of the glasses above the top surface of the plate (preferably "milled" or roughened) forming interglass spaces in the nature of retaining-cells to key the plastic to the face of the grating.     My invention consists in the combined elements as combined that constitute this special form of manufactured concrete lights, the perforated plate made with bayonet-slotted

light-holes and glasses to match having been previously secured to me by English Patent No. 2,788, dated August 23, 1873, and a concrete-faced grating wherein the glasses form retaining-cells to key the plastic over-layer to the face of the grating having likewise been patented to me by the same patent.     In the accompanying drawings, Figure 1 represents a one-casting tile made according to my improved mode of construction. Fig. 2 represents a combination-tile made according to my improved mode of construction. Fig. 3 is a longitudinal section of Fig. 2, but equally illustrative of Fig. 1. Fig. 4 represents in full size an interlocking glass. Fig. 5 represents the same interlocked with a grating. Fig. 6 represents in full size a bayonet-slotted light-hole in a portion of a perforated plate or grating. Fig. 7 is a bottom plan view of glass, Fig. 4.     A, Fig. 1, indicates a portion of the plate with open light-holes.     B, Fig. 1, indicates a portion of the plate as it appears after the glasses are interlocked with the grating.     C, Fig. 1, indicates a portion of the plate as it appears when, the glasses having been interlocked with the grating, the cement facing has been also added thereto.     A B C, Fig. 2, represent a combination-tile similarly conditioned with Fig. 1, the numbers 1 2 3 4 indicating the fractional gratings that compose the tile. The light-holes of Figs. 1 and 2 being small, no bayonet slots are represented around the light-holes; but they are to be inferred, these figures being intended to be taken in connection with Fig. 3, where the interlocking bases of the glasses are clearly shown.     A in Fig. 2 indicates fractional grating 1, the light-holes open.     B in Fig. 2 indicates fractional grating 2, set with glasses.     C in Fig. 2 indicates fractional gratings 3 and 4, this portion of the combination-tile being both set with glasses and concreted.     a indicates the grating or perforated plate.     b indicates light-holes in the grating.     c indicates glasses, and also the top portion of the glass.