US895605A - Fireproof floor construction. - Google Patents

Description

EMIL UFENAST, OF ZURICH, SWITZERLAND.

FIREPROOF FLOOR CONSTRUCTION.

Specication of Letters Patent.

Patented Aug. 1l, 1908.

Application filed 0ctober-23, 1906. Seriall No. 340,137.

To all whom it may concern:

Be it known that I, EMIL UFENAST, a citizen of Switzerland, residing in the town of Zurich, Switzerland, have invented a new Improved Fireproof Floor Construction, of which the following is a specification.

The present invention relates to a hollow beam made of burnt clay and built up of several pieces or bricks for the construction of ceilings, in combination with iron insertions and cement mortar. Such beams being made before they are inserted between the iron beams of the ceiling can be handled as a whole so that supports in putting them in place are not necessary.

The beam may advantageously be made of a length varying from one to four meters. By laying the beams side by side a continuous ceiling is formed which may be immediately used and loaded. In order to pro'vide for the tensional strains which tend to bend the beam, the latter is armored with longitudinal iron rods or insertions which, as is known, may be very highly loaded in tension. The compressional strains, on the other hand, are taken up by the hollow bricks which possess a comparatively high compressional resistance.

Cement mortar serves well for binding the several bricks with the iron insertions, for as is well-known, this mortar unites intimately both with brick and iron. The abutting joints, that is to say the joints between the separate bricks of which the beam is built up, are also filled with cement mortar.

The invention is illustrated in the accompanying drawings, of which Figure 1 is azlongitudinal section through a beam 5 Fig. 2 is a plan of several such beams laid side by side to constitute a ceiling; Fig. 3 is a cross section through a beam drawn to an enlarged scale, and Fig. 4 is a longitudinal section of the beam also drawn to an enlarged scale.

The beam, which may be of any suitable length, is built up of one or more suitably formed hollow bricks 1 having internal spaces 2 and perforations or channels 3 and 4. The spaces 2 serve for deadening sound and at the same time diminish the weight of the brick.

The lower perforations 3 are for the reception of the iron insertions 8 which are to take up the tensional strain. At their outer ends, rods 8 are bent over the ends of the beam and are then turned inward into perforations 2, to prevent longitudinal displacement of the rods before the ducts 3 have been filled with cement. The upper perforations 4 are also for the reception of iron insertions 9 which, are also turned inwards at their ends and are only intended to give the beam greater strength, so as to facilitate its transport and handling; these insertions therefore do not need to be of any great strength. The sides 5, Fig. 3, of the brick l are channeled and diverge downwardly, so that the upper surface 6 is somewhat narrower than the lower surface 7. Owing to this construction, when the beams are laid side by side to construct a ceiling, longitudinal channels are formed between them into which cement is poured. For the better adhesion of this cement, the sides 5 are fluted as shown in Fig. 3. If necessary, iron insertions can also be introduced in the said longitudinal channels to increase the solidity of the structure.

When the iron insertions 8 and 9 have been introduced into the respective perforations, the latter are filled up with cement mortar. The abutting joints 12 are also filled with cement and as soon as the latter has set and dried, the beam is ready for use.

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 1. A fire proof floor construction, comprising a series of hollow tiles having upper and lower perforations, upper and lower rods engaging said perforations, and a cement filling surrounding said rods within the perforations, substantially as specified.

2. A fire proof Hoor construction, comprising a series of hollow tiles having upper and lower perforations, upper and lower rods engaging said perforations and having bent ends that extend into the hollow bodies of the flanking tiles, and a cement filling surrounding the rods within the perforations, substantially as specified.

In witness whereof, I have hereunto signed my name in the presence of two subscribing witnesses.

EMIL UFENAST.

Witnesses A. LIEBERKNnoI-IT, J KRAUER.

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