US718267A - Fireproof floor. - Google Patents

Description

PATENTED JAN. 1s, 1903. H. MARING. PIREPROOP FLOOR.

APPLICATION FILED 0UT.27, 1902.

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N0 MODEL.

PATENTED JAN.l 13, 1903.

E. MARING. PIREPROOP FLOOR.

APPLICATION FILED 00T. 27, 1902.

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UNTTED STATES PATENT Cri-FICE.

HERMANN MARING, OF DARIEN, CONNECTICUT.

FIREPROOF FLOOR.

SPECIFICATION forming part of Letters Patent No. 718,267', dated January 13, 1903.

Application led October 27,1902. Serial No. 128,985. (No model.)

To @ZZ whom it may concern:

Be it known that I, HERMANN MAKING, a citizen of the Empire of Germany, residing in Darien, in the county of Fairield and-State of Connecticut, have invented certain new and useful Improvements in Fireproof Floors, of which the following is a specification.

This invention has reference to certain improvements in reproof oors which are constructed of slabs or blocks that are inserted between the beams of the floor, said slabs or blocks being provided with longitudinalopening and reinforcing metallic skeleton frames of connected longitudinal and transverse portions in the lower half of each slab or block, said transverse portions being shaped to conform to the general contour of the openings in the blocks, as will be fully described hereinafter and iinally pointed out in the claims.

In the accompanying drawings, Figure lis a perspective view of a portion of my improved reproof floor. Fig. 2 is a plan view of Fig. 1. Fig. Sis a perspective view of one of the blocks shown in connection with the wire screen for protecting the base of thev Figs. 4, 6, and8 represent verticalY beams. transverse sections through the blocks, showing cross-sections of different forms of openings and reinforcing metallic skeleton frames of the same. Figs. 5, 7, and 9 are vertical transverse sections of the skeleton frames employed,respectively,in connection with the blocks shownin Figs. 4., 6, andS; and Fig. l0 is a plan View of the skeleton frame for each block.

Similar letters of reference indica-te corresponding parts.

In the drawings, A represents a block ernployed for my improved fireprooffloor. The block is preferably made of cement'and is parallelepiped in form, with opposite oblique and obtuse corners, so as to be conveniently dropped between the I-beams of the floor. Each block is provided with longitudinal openings a of hexagonal, round, octogonal, or other polygonal cross-section, as shown, respectively, in Figs. 4, 6, and 8, so as to diminish the weight of the block. In the upper and lower portions of the block or solely in the upper portions, intermediate the' larger openings a, smaller openings a may be arranged,said openingsabeingformed by means of a mold provided with longitudinal sheetmetal tubes the cross-section of which correspends to the shape of the openings to be produced, which tubes are supported at the ends on a suitable bed-plate, so that the cement or other plastic material can be firmly rammed around the tubes in the mold, after which the tubes used in the mold are withdrawn when the block has been formed and dried. The lower half of each block is reinforced by means of a skeleton frame B, composed of connected longitudinal and transverse metal straps. The transverse straps b are bent into angular shape at regular intervals, so as to conform with the general contour of the openings a, the angular portions being disposed between the openings and having forked portions b. The longitudinal straps b2 are supported in the forked position h' of the transverse straps b either loosely or by being sol dered or otherwise fastened thereto, as shown in Figs. 5, 7, 9, and l0. The transverse straps b, that are arranged at the ends of the prismic block, are inclined obliquely to the transverse straps, which are arranged at right angles with. .the longitudinal straps, so, as to reinforce the ends of the block in the same manner as the Amiddle is reinforced by the transverse skeleton frame B. This arrangement of the skeleton frame is shown in Fig. 10. The sheetmetal skeleton frames arranged in the lower portion of each block impart the required degree of strength to the same, so as to resist the tensile strains which may be exerted on the lower half of the block.

When making the blocks, a bottom layer of cement is first spread over the bed-plate of the mold, after which the transverse skeleton frames are pressed into the mold and held in position by their longitudinal straps. The tubes for the openings are then placed in position between the skeleton frames, in proper relative position thereto, by being supported at the ends outside of the mold proper, after which the final pouring in and ramming of the cement aroundthe skeleton frame andv tubes is accomplished until a block of the required height is obtained. The top is leveled off by a scraper and the tubes removed after the block is sufliciently set. The cement holds the metallic skeleton frames firmly in position, the latter imparting strength to the ICO body and resistance to the tensile strains that may be exerted upon it, and thus the block can be readily completed in the factory and shipped to the place where it is to be used. 'Ihe adjacent ends of the blocks are preferably provided with grooves and tongues c, so that the blocks interlock each other. The blocks are dropped into the I -beams in the usual manner and set up, triangular forms of blocks being used at the ends, the ends of the blocks fitted upon the base of the I-beams by being formed with a recess c', and embedded in the ends are wire screens or aprons d, as shown in Figs. l and 3, which overlap below the base of the beam and serve to support the plaster or other fireproof material for protecting the base of the I-beanis. The wire screens or aprons d are inserted into the ends of the blocks while the same are formed in the mold by molding a portion of the screen into the base of the block, as shown in Fig. 3.

My improved reproof' floor blocks are made comparatively light in weight by reason of the longitudinal openings formedin the same, so that a comparatively small quantity of cement is required for making the same, while owing to the transverse skeleton frames and their longitudinal connecting straps great strength is imparted to the lower portion of the blocks at the points where tensile strength is required, while by the arrangement ofthe wire aprons an eective protection for the base of the I-beams is supplied.

Having thus described my in vention,I claim as new and desire to secure by Letters Patentl. A slab or block for iireproof floors, coninsges?` sisting of a cement body provided with longitudinal openings, a metallic skeleton frame arranged below said openings in the lower portion of the block, said frames having transverse portions approximately to the shape of the cross-section of the lower openings, and longitudinal straps connecting said transverse portions, substantially as set forth.

2. A block for reproof Iioors, consisting of a body of cement provided with larger longitudinal openings and smaller longitudinal openings between the same, transverse metallic straps embedded in said blocks below the larger openings and corresponding in shape approximately to the lower portion of the saine, said transverse straps being provided With forked portions, and longitudinal straps attached to said forked portion, and located in the solid portions between the openings, substantially as set forth.

3. A block for fireproof floors, consisting of a cement body provided with longitudinal openings, a skeleton frame in the lower portion of the block below and with raised an gular portions intermediately between said openings, and wire screens or aprons inserted into the ends of the blocks for extending over the under side of the base of the I-beams of the floor, substantially as set forth.

In testimony that l claim the foregoing as my invention I have signed my name in presence of two subscribing witnesses.

HERMANN MARING.

Witnesses:

C. BRADWAY, HENRY J. SUHRBIER.

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