US1268123A - Wood paving-block and pavement. - Google Patents

Description

H. C. INNES.

WOOD PAVING BLOCK AND PAVEMENT.

APPLICATION FILED JULY 15,1915.

1 ,268, 123 Patented June 4, 1918.

when placed in parallelepipedon, square in cross section and rectangular in longitudinal section. They have a flat top 1 and a bottom 2., and the sides and ends are out in special fluted shape,

the grain of the blocks running parallel with the sides.

The flutes or corrugations in the blocks may be of any desired conformation or multiple. The preferred form, as shown in the drawing, consists in regular waves having crests 3 and troughs 4. As shown, the curves or waves on the ends are of the same conformat-ion as those on the sides, although this is not absolutely necessary. i a

A particular feature of the curves is that they are uniform on any set of blocks so that the blocks will intermesh with each other osition with the crests of one block lying in the troughs of another. The ends of the blocks may be made with one end curved partly oppositely to the other, so that they will partly interlie each other, or else they may be made uniform on both ends so that only the crests will touch. In either case, the plan adopted must be fol lowed throughout so as to give the proper uniformity.

In laying the pavement, the workman can never make a mistake and lay a block with the grain running horizontally of the paved surface, as the curved surfaces will then lie uppermost. Accordingly it is not necessary to out these blocks withthe height greater than the width to prevent this, and thecross section of the blocks may be safely made square, or other dimension, if desired.

The blocks are chamfered or beveled both top and bottom at 7 said bevel running at preferably a steep pitch from the trough of the furrows or corrugations. Thusthe only parts cut away are the extended fluting in the block. This chamfered nature of the blocks provides a good foothold for horses.

It will be understood that the blocks are to be laid lengthwise across the street, in staggered relation with each other. As shown in the drawing, a course 5 of blocks is laid across the street or other surface to be paved, and then another course 6 laid in staggered relation thereto. It is not possible to get absolute accuracy in the laying of blocks, and it is not expected that all of the blocks in any two courses will bear the exact relation to each other.

Specifications for the kind of Wood to be used in a pavement, its percentages of heart wood, determined by the number of rings, and the pounds treatment of creosote oil per cubic footof wood and its classification are variable iii various cities. Dependent upon the above and the age of the treated blocks, also the season whether dry or moist,

must serve as a guide in the laying of the blocksffor best results. For this purpose,

the proposed block can meet such requireclosely interlie each other; see Figs. 3 and 4. Y

If the "blocks are shrunk and dry, which will more often be the case in good weather, then the blocks are to be placed with the curves out of mesh, as shown in Fig. 2. It will be understood that there can be no exercise of judgment in spacing the ends of the blocks, as each f course will be perfectly straight and the space or lack of space between the ends of the blocks dependent upon how they are shaped originally and not upon how they are laid, if the rule is followed that the blocks should contact with each other in all instances. i V l When the unequal expansion takes place of the varied density of the blocks, the pressure of one on the other due to the curves, will be to cause a sliding adjustment of the various blocks into closer mesh with each other, thereby taking up the unit expanout their oils, or buckling the pavement. The fact that crests adjoin crests between sides or ends of blocks will not militate against sliding movement, as the blocks will not move in straight lines.

The relationship of one course of blocks with an adjoining course is possible at all times of starting the. course by cutting or batting a block at the desired place, which will regulate in a measure the space ing between the blocks, as also the breaking of joints. A p

As above stated, the exact relation may vary, and this variation will tend to give a balance to the pavement, which will, in a measure, prevent a general movement of the blocks all in one direction.

The. blocks except in very exceptional cases will always wholly or partly intermesh with each. other, which will tend to support the chamfered edges provided for a foothold for horses. In the event of the blocks being spaced with the greatest opening, the chamfered foothold edge would be protected by means of the extending crests of the blocks.

sion without crushing the blocks, pressing its The space between the blocks, including the portions chamfered away, will befilled with. plastic or granular products in ordinary practice, and the movement of the blocks will not be s-ufiicient under all but exceptional strains to squeeze out an ap the corrugating of an edge does not render it liable to breaking down on lateral sure, and as has been said, a vertical pressure on the blocks will not result in the breaking down of the curved outline, because the freedom of the blocks to intermesh serves as a protection.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is z 1. Wood paving comprising blocks having fluted sides running with the grain, said blocks placed so that the curves do not entirely inter-mesh, whereby a sliding movement will be allowed of the blocks into fur ther mesh Without buckling the pavement or crushing the blocks.

2. A Wood paving comprising blocks of substantially rectangular shape, and having a horizontal fiat upper surface out across the grain and vertical sides cut in complementary curves and reverse curves with the grain of the wood, whereby the space be tween like blocks in laying the same will be possible of regulation to allow for expansion and contraction, while the blocks will abut each other at all times.

HARRY C. INNES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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