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314,677: 1 of 4

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Patents: 177 of 511

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Peter H. Jackson
7 of 14

SPECIFICATION forming part of Letters Patent No. 314,677, dated March 31, 1885.
Application filed December 1, 1884. (No model.)
To all whom it may concern:
    Be it known that I, PETER H. JACKSON, of the city and county of San Francisco, State of California, have invented an Improvement in Floors or Area-Coverings; and I hereby declare the following to be a full, clear, and exact description of the same.
    My invention relates to certain improvements in fire-proof floors, pavements, or area-coverings; and it consists of a surface of artificial stone or concrete, either with or without illuminating-tiles set therein, together with corrugated metal plates, strengthening bars, or ridges in connection with said plates, and metallic ties for the same, together with certain details of construction, all of which will be more fully explained by reference to the accompanying drawings, in which--
    Figure 1 is a perspective view of my floor or covering. Fig. 2 is a view showing one form of strengthening ribs or ties. Fig. 3 is section taken transversely to the corrugations, and showing one form of strengthening-rib. Figs. 4 and 5 are sections taken through the axis lengthwise of the corrugations, showing the inclined strengthening-rods.
    In my present construction I employ corrugated iron plates a, formed in sections which are suitably supported at the ends, and when it is necessary to illuminate the space below bull's-eye or other thick glass may be fixed in suitable openings formed in the ridges or upwardly-curved portions of the plates. Above this corrugated iron and around the glasses, when they are used, I fill Portland cement, concrete, or other suitable material, which will form a surface upon which passers may walk, while the under surface of the corrugated iron and the glass forms a ceiling to the apartment beneath.
    If desired, that portion of the corrugated plates which extends upwardly may be whitened, painted, or otherwise coated, so as to form a reflecting-surface by which light will be better diffused within the apartment.
    In some cases I form the corrugated plates with transverse bars extending from side to side of each corrugation, or with vertical plates extending across in a similar manner, and having holes through them, or with projections which may extend into each side of
the corrugations, as shown in Figs. 1 and 3, so that when the cement is filled in from above it enters the depressed portions of the corrugated plates and fills in around these plates and bars and projections, so as to form a solid union or bond, which will prevent the cement from being loosened from the iron. These projections also serve to strengthen the plates as well as to unite it with the concrete.
    In some cases I employ beams or bars which lie in the grooves formed by the downward curve of the corrugated plates. These bars being either extended along the grooves without fastening to the plate, or, if desired, they may be attached to the lower portion of the plates, and the concrete will be filled in around them, as before described.
    Figs. 2, 4, and 5 show still another method of strengthening these corrugated sections by the use of metallic ties which may extend either longitudinally through the depressions formed by the downward grooves of the corrugated plates, or they may be bent downward in the center, the ends rising, as shown in Figs. 4 and 5. These bars may be secured or not at intervals to the bottom of the corrugated plates, and their ends may pass through bearers or supports where they can be tensilely strained by nuts upon their outer ends, or by other means. In connection with this construction of corrugated plates I employ metallic bearers, which consist of deep vertical ribs having horizontally-projecting ledges or shoulders. These ribs may fit against the corresponding ones of the next bearers of the adjacent section, to which they may be bolted when in place, as shown in Fig. 2. The shoulders of these bearers follow the outline of the corrugations or ends of the plates, so that the latter may rest upon them, and the metal is thus strengthened in a direction at right angles with the corrugations. These metallic bearers may be connected with the direct metallic ties, as shown in Figs. 2, 4, 5. These ties extend from one bearer to the next and are secured to them as shown, thus holding the bearers rigidly in position, and when the whole is filled in with the plastic material with ties extending through the corrugated plates, it forms a net-work which secures the whole of the parts at their relative distances