US345379A

US345379A - Fire-proof floor-arch

Info

Publication number: US345379A
Authority: US
Publication date: 1886-07-13
Anticipated expiration: 1903-07-13

Description

(No Modl.)

I c. c. GILMAN. PLRE'PROOF FLOOR ARGH.

Patented July 13, 1886.

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NITED STATES j PATENT OFFICE.

CHARLES CARROLL GILMAN, OF ELDORA, IOlVA.

FlRE-PROOF -FLOOR=ARCH.

SPECIFICATION forming part of Letters Patent No. 345,379, dated July 13, 188 6.

Application filed October 15, 1885. Serial No. 179,919. (No model.)

To all whom it may concern.-

Be it known that I, CHARLES CARROLL GIL- MAN, a citizen of the United States, and a resident of Eldora, Hardin county, Iowa, have invented a new and useful Improvement in Fire-Proof Floor-Arches, (Case G,) of which the following is a specification.

The object of my invention is to construct a floor-arch which shall be light as well as exceedingly strong; and to this end my invention consists in combining with iron floorbeams blocks or joists of porous terra-cotta or terra-cotta lumber strengthened by rods or cores of iron cast in ahole or holes therein, as fully hereinafter described and claimed.

In the accompanying drawings, forming part of this specification, Figures 1 and 3 represent two forms in which my invention may be embodied; and Figs. 2 and 4 are cross-sections,respectivel y, of the blocks or joists shown in Figs. 1 and 3.

Referring to the drawings, A represents iron I-beams connected by tie-rods B, provided with screw-nuts. In the space between said beams I place blocks or joists of porous terracotta or terra-cotta lumber. I employ this material for the reason that it is an excellent non-conductor of heat, and will not crack like ordinary terracotta when subjected to the action of heat and water. Possessing these properties, and being absolutely fire-proof, it is far superior to other materials for the purpose in view. It can also be sawed and worked with ordinary carpenters tools, and thus it is possible to secure accurately-fitting joints.

The blocks or joists O, of terracotta lumher, are made from three to five feet in length, though they may be made shorter or longer, if desired. Their depth is preferably from eight to fourteen inches, and their width from three to five inches. These blocks or joists are provided with one or more iron cores or rods, which are cast in one or more of the longitudinalpassages or holes therein.

-By casting the iron in said holes it becomes thoroughly united to the porous terracotta, and takes up at once any strain imposed on the latter, thus greatly strengthening said blocks have one only or several cores.

In Fig. l I have shown the arch between the beams to consist of two joists, C, placed at an angle from the horizontal. Each joist is provided with an iron core, D, the ends of which, as well as the ends of the joists, abut against each other and against the webs of the iron beams. Instead of casting the iron core in the central hole, a-core may be cast in each of the outer holes, as shown in Fig. 4, or all of the several holes may be provided with iron cores. v

In Fig. 3 I have shown the arch between the beams to consist of one joist, 0, provided with two iron cores, D; but said joist may In this construction the joists are placed in position by slightly spreading the beams to permit their insertion, and finally causing the beams to approach each other and clamp the joists be tween them by tightening the nuts on the ends of the tie-rods.

In both of these constructions the iron cores add greatly to the strength of the joists, so that greater weights than were heretofore allowable can be sustained by the floors laid over said joists.

I am aware of the patent to J. J. Schillinger, No. 182,717, dated September 26, 1876,which describes anchors connected by tie-rods around which plaster-otparis is placed so as to cover and inclose the same, the whole forming an arched tile; but this construction differs essentially from my invention, and to it I lay no claim.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. The combination, with iron beams, of an arch consisting of porous terra-cotta or terracotta lumber strengthened by iron cast therein, substantially as described.

2. The combination, with iron beams, of an arch consisting of two blocks or j oists of porous terracotta or terra-cotta lumber strengthened by rods or cores of iron cast in holes therein and placed in an inclined position, substantially as shown and described.

3. The combination, with iron beams, of an arch consisting of porous terracotta strength- 50 or joists. ened by iron cast therein said iron extending 10G from end to end of each block or piece, sub- In testimony whereof Ihave signed my name stantiaily as described. in the presence of two witnesses.

4. The combination, with iron beams, of an arch consisting of porous terracotta strength- CHARLES CARROLL GILMAN.

5 ened by iron cast in longitudinal passages therein, said iron abutting against the Webs \Vitnesses: of the iron beams, and tie-rods provided with SAML. G. SLOAN, screw-nuts, substantially as described. H. H. GALUSHA.