US508537A - Paving-block - Google Patents

Description

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PAVING BLOGK No. 508,537. Patented Nov. 14,1893.

UNITED STAT-Es:

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PATENT @unica HORACE BRUN SON, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO CLIFFORD CHARLEY COULTER, OF MANSFIELD, OHIO. 1

PAVING- BLOCK.

SPECIFICATION forming part of Letters Patent No. 508,537, dated November 14, 1893.

. Application filed July 14, 1893. Serial No. 480,517. (Nomodel.)

.To all whom it may concern/b Be it known that I, HORACE BRUNsoN, al citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvementsin Paving-Blocks, of which the following is a specification.

My invention relates to artificial blocks of cement building stone or similar material, such for instance as is used in side walks, street paving and the like, and it has for its object to provide such a block as can be laidV down, taken up and replaced, and which when laid will retain its proper and desired contour and be practically unaffected by the elements, and to these ends my invention consists in a block made u p of suitable cement or composition and provided with internal strength ening devices which are embedded in the material tending to maintain it in a rigid and uniform condition under all conditions.

My invention is in the nature of an improvement on my prior patent, No. 469,229, dated February 23, 1892.

Referring to the accompanyingdrawings, in which I have illustrated the preferred embodiment of my invention-Figure 1, is a perspective view, the outlines of the block being .shown in dotted lines andthe strengthening The blocks may be of any desired shape or contour, but I have shown them in the accompanying drawings of rectangular 'form about one and a half times as long as they are broad, and of sufficient thickness to be readily used under the desired conditions. The blocks may be composed of any cement, compound or artificial stone or the like, and in order to strengthen the block I embed in the cement the strengthening ribs or rods, and while these rods may be of any suitable material, I preferably make them of iron and bent or shaped substantially as indicated and more particularly pointed out hereinafter. The rods preferably do not extend to the outward edge of the block but are so arranged as to be inclosed in the material of the block,

exposing only the cement, stone or other surface. "lhus in the drawings I have shown three longitudinal ribs, a, b, c, and these are made of fiat bar iron, as shown at a, or of angle iron as shown at c, or of any other similar and desirable merchantable bar or other form of iron. It Will be seen that the outer bars cr, c, are curved in one direction so that their ends approach nearly to the under side of the block, while their central portions approach nearly to the upper side, While the bar l), is curved in an opposite direction and is similarly arranged.

Extending transversely substantially the VWidth of the block is the bar d, and this is 'also formed of any desired material and configuration and is curved inthe manner shown so that its ends extend nearly to the under surface between the curved portions of the bars a, c, While its central portion extends nearly to the upper surface above the bar b. This is the preferred arrangement and I nd that these four bars in a block of ordinary size are sufficient to accomplish the purposes desired, but it is evident that I can use more or less bars, both longitudinally and transversely, depending upon the size of the blocks and other considerations, without departing from the spirit of my invention. The bars being curved and arranged with their curves extending in opposite directions, tend to resist any tendency to Warp or heave.

It will be understood that in forming the blocks the bars are arranged in the desired relation in the mold and the' material in its plastic condition is molded around the bars and allowed to set, and when this is accomplished the block is all ready for use and can be laid and taken up and relaid and arranged to meet the requirements of any particular case without dangerof destroying or injuring them and they will serve to produce a smooth and even surface and form a desirable sidewalk or pavement.

l. A paving block comprising a mass of cement orsimilar material having embedded therein the separate bars, the bars being curved and arranged out of contact with each other substantially as hereinbefore described.

2. A paving block comprising a mass of IOO lo out of contact with each other and with their curves extending in alternate directions and a transverse curved bar interlocking with the longitudinal bar, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of I5 two subscribing witnesses.

HORACE BRUNSON.

Witnesses:

HORATIO G. KIMBALL, WILLIAM P. KIMBALL.

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