US319670A

US319670A - Fire-proof floor

Info

Publication number: US319670A
Authority: US
Publication date: 1885-06-09
Anticipated expiration: 1902-06-09

Description

(No Model.) v

J. BOSSYNS.

FIRE PROOF FLOOR. No. 319,670. Patented June 9, 1885.

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NITED STATES ATENT risica.

JOSEPH BOSSYNS, OF BALTIMORE, MARYLAND.

FIRE-PROOF FLOOR.

SPECIFICATION forming part of Letters Patent No. 319,670,1dated June 9, 1885.

Application tiled January 8, 1885. (No model.)

To all whom it may concern:

Beit known that I, JOSEPH BossYNs, a citi- Y zen of the United States, and a resident of the city of Baltimore, in the county of Baltimore and State of Maryland, have invented certain new and useful Improvements in Fire- Proof Floors, of which the following is a full, clear, and exact speciiication, reference being made to the accompanying drawings, such as will enable any one skilled in the art to which my invention appertains to construct the same. y

In the drawings similar letters of reference are used to indicate the same parts in different gures.

Figure l represents one arch andv a section of two girders. G G are girders. S S are skewbaoks of the arches set upon the girders. B is a block, and K is the key of the arch.

ln Fig. 2 the arrangements of the parts of the arch are reversed-S, Fig. l, beine a short skewback, and in Fig. 2a long one; S in Fig. l being long, and in Fig. 2 short. So, also, one block B is on the lett of the key in Fig. 1 and on the right in Fig. 2, whereas B B are on the right in Fig. 1 and on the leftin Fig. 2.

Fig. 3 is a top view offthe floor, showing the alternate arrangement of the blocks.

My invention relates to that class of floors made ot' iron girders and arches of a Jrire-proof material; and the special feature which constitutes my invention is the arrangement of the blocks forming those arches in such a position in relation to the blocks forming contiguous arches as to cause the door composed of a number of arches combined together to be much stronger than any heretofore used.

H eretotore tire-prooi iioors have been made oftlat arches constructed in many ways, prominent among which is a floor consisting ot' a series ot' identical hollow arches, the hollows being perpendicular to the girders or in the direction of the thrust of the arch. The result of this arrangement was to produce a iioor consisting of a series of hollow arches, in which the keys were all in the middle and the blocks in the same relative position on either side, so that the joints between the blocks ran in a continuous line from one end of the floor to the other parallel to the girders. Experience has shown that this form of arch will settle and the joints separate under heavy pressure.

My invention is designed to remedy the defects in this floor, and may be said to be an improvement upon it, because I use the essential 'feature of that door-namely, the hollow perpendicular to the girder, and which is p atented to A. Beckwith, No. 151,826, June 9, 1874, Improvement in Fire-Proof Floors.77

I construct my floor with the hollowsinthe blocks running at right angles with the girders, in such a way that the joints between the blocks of the arches will never fall together, but always against the solid side of a block in the arch on either side of it. By this method I accomplish a twofold result: by making an arch ot' a cylinder of cement placed at right angles with the girders and with its ends .resting upon them a given quantity of materlal is used to the greatest possible advantage, and, secondly, by arranging the blocks ot' the adjacent arches in such a manner as to break joints with one another. This combination, which has never been made before, makes a floor which is capable of sustaining a much greater weight than any other in use.

The method ofapplying my invention shown in the drawings is one which in practice I have found successful, and I therefore give it as one method by which my invention may be successf'ully put into practice.. y

What I believe to be new, and desire therefore to secure as my invention by Letters Iatent, is

A lire-proof floor consisting of iron girders, incombination with two or more sets of independent arches of suitable size and material, and having hollows running at right angles with the girders, in which the blocksvforming adjacent arches break joints with each other.

In witness whereof I have hereunto set my hand and signed my name this 29th day of November, 1884.

JOSEPH BossYNs.'

Witnesses:

CHAs. D. STIGKNEY, Jr., JAMES L. STEUART.