US780566A - Fireproof floor and ceiling. - Google Patents

Description

. MG I PATENTED JAN. 24, 1905.

J.F.KLBINE.

PIREPROOP FLOOR AND CEILING. APPLICATION FILED SEPT. 25, 1903.

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EBA-Horne! UNITED STATES Patented January 24, 1905. I

PATENT @FFICE. I,

J OHANNES FRANZ KLEINE, OF BERLIN, GERMANY.

FIREPROOF FLOOR AND CEILING.

SPECIFICATION forming part of Letters Patent No. 780,566, dated. January 24, 1905.

I Application filed September 25, 1903. Serial No. 174,636.

To a/ZZ whom it may concern.-

Be it known that I, J OHANNES FRANZ KLEINE, architect, a citizen of the Kingdom of Prussia, residing at Liitzow-Ufer Berlin, Germany, have invented Improvements in Fireproof Floors and Ceilings, of which the following is a specification.

The present times require imperatively that fireproof floors of large span, slight weight, great strength and safety be constructed as cheaply as possible. The arrangement of metalstays or rods as heretofore embedded in suchstructures, according to which said stays extend from one beam to the other without any further support, is only able to meet the requirements of practice to a certain degree' and require a correspondingly large amount of metal, so that the manufacturing is proportionately high. Moreover, their safety and durability easily suffer when the proportion of the thickness and span are unfavorable. By the present invention these drawbacks are avoided, and by using this invention cheap floors of great strength and safety and up to very large spans can be constructed. With this object metal stays or bars are embedded in the flooringin truss or cantaliver-like arrangement, metal bars of any suitable section, and particularly metal wires, being used for the purpose. The ends of these metal bars are connected either with the beams or to the brickwork or embedded in suitable manner in the neighboring floor. The struts are adapted to the special form of the floor, which is constructed in accordance with the particular requirements. The arrangement of such struts or supports, which .in combination with the ties alone enables the siderable economy of metal and increased strength and safety of the floor are obtained, or, in other words, with the same weight of metal as heretofore necessary for smaller spans the free span of the floor can be extended very considerably, even to dimensions which much exceed the limits possible with the constructions heretofore known, the

strength, safety, and durability being at the ing to the invention are represented by way of example. V

Figure 1 shows one construction with a plane under surface, and Fig. '2 a construction with a cotfered or arched under surface.

When for certain reasons it is considered advisable, the embedded metal stays or rods,

especially in the middle portions of the floor,

may be multiplied. Moreover,the dimensions or section of the metal stays or rods may vary in the separate parts. The described arrangement of the metal stays or rods remains, es-

sentially, the same Whether bricks, concrete, or bricks and concrete are used alternately in constructing the floor.

A suitable horizontalpartition wall or floor is designated by 1, in which two beams 2 2, spaced a distance from each other, are embedded. Inter-posed between these beams is a strengthening-frame having a substantially truss cantaliver arrangement at opposite ends of the same in combination with the beam. The exemplilication of this frame shown in Fig. 1 includes a major stay bar or member 3, extending between the beams 2 2 and connected to the upper ends of the latter by, obliquely-extending stay members 4 4. Strut members 5 5 are interposed between the members 4 4t and the beams, being connected to the central portions. of the former and finding bearings at their lower ends against the latter.

In the exemplification of myinvention shown in Fig. 2 the major stay member is designated by 6 and is provided with end continuations serving the purposes of the members 4 in the form of the invention shown in Fig. 1. The strut members arev also modified in that each pair is formed by the end portions of a single stay member 7.

What I claim, and desire to secure by Letters Patent, is

1. The combination with the beams spaced a distance apart, of a frame including a member connected to the upper portions of the beams, and other members extending obliq uel y in relation to the beam connected to the firstnamed member and finding bearings at their ends against the side of the beam whereby said frame is provided at its ends with sub stantially a truss cantaliver arrangement in combination with the beams.

2. The combination with a pair of beams embedded in a horizontal partition and spaced a distance apart, of a stay-bar extending transversely in relation to said beams and between the same, a downwardly-extending member arranged adjacent to each beam and connecting the upper portions of the latter to the stay-bar, and struts connected to the downwardly-extending member and finding bearings at their lower ends against the sides of the beams, substantially as described.

3. The combination with a pair of beams spaced a distance apart, of a frame including a major rigid member, downwardlycxtending rigid members connecting the first-named member to the top of the beam, and rigid strut members connected to the central por tions of the downwardlycxtending members and finding bearings at the lower ends against the sides of the beams, substantially as described.

In witness whereof I have hereunto set my hand in presence of two witnesses.

J OH A NNES FRANZ KLEINE.

Witnesses:

AUG. Konmmss, lroTTFR. Moses.

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