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314,677 · Jackson · "Floor or Area Covering" · Page 2
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from each other, and it is very solid in resisting deflection. Ribs may be formed between these half-bearers which I have described to keep those which are adjacent to each other a certain distance apart to admit of the introduction of cement between them, which will make a water-tight joint to the full depth of bearer.
    Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is--
    1. In a sidewalk or floor, metallic supporting-beams with transverse arched or corrugated plates, in combination with a super-posed surface or sidewalk composed of cement, artificial stone, or concrete, substantially as herein described.
    2. In sidewalk, area-covering, or floor, metallic supporting-beams with transverse corrugated plates to support a sidewalk or surface of concrete, in combination with bars or bearers extending longitudinally within the corrugations, substantially as herein described.
    3. In a sidewalk, area-covering, or floor, metallic supporting-beams with corrugated iron plates extending between them, and having the upwardly-curved arched portions perforated to receive illuminating-glasses, in combination with a filling between the glasses of concrete or artificial stone which is supported by the plates and fixed to the floor or surface, substantially as herein described.
    4. in a sidewalk, area-covering, or floor, corrugated or iron or other metal plates for the reception of a surface of concrete or artificial stone, in combination with metallic projections or bars formed in the depressions or grooves of the corrugated metal, substantially as herein described.
    5. In a sidewalk, area covering, or floor,
metallic beams with corrugated iron plates supported between them and a filling of concrete or other plastic material above the plates, in combination with metallic ties extending longitudinally through the corrugations secured at the ends, substantially as herein described.
    6. In combination with the corrugated plates, bearers consisting of vertical plates or bars secured at the ends of each section, and having projecting ribs or flanges curved to correspond with the depressions and elevations in the corrugated plates, and upon which the ends of the plates rest and are supported, substantially as herein described.
    7. Corrugated metallic plates and bearers having correspondingly-curved projecting ribs upon which the plates are supported, together with lags or projections between the adjacent ribs to form a space for the introduction of a water-tight cement, substantially as herein described.
    8. In a sidewalk, area-covering, or floor, corrugated iron plates having the upwardly-curved arched portions perforated to receive illuminating-glasses, in combination with a filling between the glasses of concrete or artificial stone which is supported by the plates, and with metallic bearers consisting of vertical plates or bars on which the ends of each of them rest, and having projecting ribs or flanges curved to correspond with the depressions and elevations in the corrugated plates, substantially as herein described.
    In witness whereof I have hereunto set my hand.
PETER. H. JACKSON.
Witnesses:
    LINCOLN SONNTAG,
    CHAS. SONNTAG.