US222025A - Improvement in pavements for streets - Google Patents

Description

B.,DEVI'LL1ERS. Pavement for Streets.

No. 222,025. Patented Nov. 25,1879.l

' mehr N. PETERS, PHOTO L ITHO UNITED STATES PATENT FFIGE.

EMILE DEVILLIERS,

0E Prints, FRANCE.

Specification forming part of Letters Patent No. 222,025, dated November 25, 1879; application tiled September 13, 1879. -i

To all whom it may concern:

Be it known that I, EMILE DEVILLIEEs, of Paris, in the Republic of France, have invented a new and useful Improvement in Pavements for Streets, Ste.; and I hereby declare that the following is a description of the same, referencebein g had to the accompanying drawings.

This invention relates to pavements of which the surfaces consist of paving-blocks ot' any kind-of stone. Its object is to obtain by simple and practical means the binding together of the blocks of stone, and at the same time to obtain for pavements of this kind a bed more stable andmore resisting than any that has heretofore been obtained.

It is well known that one of the gravest causes ot deterioration of stone pavements consists in the want of solidity of the bed upon which the blocks of stone rest, from which want the blocks sink unequally under the loads which they support; and the examination of a defective pavement shows that the blocks are never broken, but 'that they have yielded unequally under the action ot' the incessant circulation of vehicles and of atmospheric causes. y

It may be understood, then, that a pavement of which the blocks are bound together upon a stable, though elastic, foundation will have very great durability.

In accompanying` drawings, Figures 1 and 2 illustrate in perspective two different modifications oi' my new system of paving.

As may be seen in each ofthe iigures ot the drawings, I arrange under each row ot pavingblocks D a bar, A, which may, as shown in Fig. 1, penetrate slightly into a groove, a, provided t'or the purpose in thelower parts ofthe blocks. rEhese bars, to which I give preferably the transverse sectional form ot a simple inverted T, are secured by means ot bolts or clamps to cross-ties or transverse sleepers B,

which may be made of wood or metal, and each ot' which is long enough to support several ot' the bars A. These longitudinal and transverse pieces A B are, like the blocks G,

embedded in sand, employed as in the ordinary pavements.

To complete the binding together of the blocks arranged as j ust above indicated, they may be bound together transversely by tenons c, as indicated in dotted lines in Fig. 1, or,

more simply, by inserting between the blocks metallic slips e, which prevent all lateral displacement under the action of the passage of the heavy loads which the pavement may receive.

In the modification shown in Fig. 2 the metallic bars A, instead of being placed under the centers ot the stones7 are arranged under the spaces between two ranges or rows of blocks, in which case the central webs of the inverted-T-shaped supporting-bars enter the said spaces, while the blocks rest upon the bottom flanges of the said bars. I consider this arrangement of the bars to enter into the spaces between the blocks, as shown in Fig. 2, to be equivalent to their arrangement to enter grooves in the bottoms ofthe blocks, as shown in Fig. 1.

The cross-ties B, instead ot' being of wood, maybe of any metal whatever that may be desired.

I will remark that generally I prefer to make the bars A ot' no very great length, in order to provide for taking them up When it is necessary to dig a hole in the ground to insert pipes for gas, water, 86e.

What I claim 'as my invention is- 1. In a stone pavement, the combination, with the stone blocks, each separated from the other, of metallic longitudinal bars A, each constructed with a vertical web and two lat- 'eral flanges, or T-shaped in cross-section, for

supporting the stones, and transverse sleepers B, upon which the metallic bars are arranged and supported, all substantially as )and for the purpose described.

2. In a stone pavement, the combination of transverse sleepers B, longitudinal metallic bars A, having vertical webs and two lateral flanges, orl T-shaped in cross-section, and plain stone blocks l), arranged between the T-shaped bars, with the outer edges ot the ybases of the stones resting on the lateral iianges of said bars, and thev vertical web of the same projecting between the adjacent sides of the stones, and serving to separate the stones and maintain them in such position, substantially as described.

EMILE DEvILLIEEs.

Witnesses:

EUG. Duurs, Pozzo DI BORGO.

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