US96870A - Improved wood pavement - Google Patents

Description

what??? Je. y, uw; WM z N-PETERS, PHDTD-LITNOGRAPNER, WASHINGTON D C ALBERT BETTELEY, OF BOSTON, MASSACHUSETTS.

Letters Patent No. 96,870, dated November 16, 1869.y

IMPROVED WOOD PAVEMENT.

The Schedule referred to in these Letters Patent and making par: of the same.

To all whom it may concern:

Be it known that I, ALBERT BETTELEY, of Boston, in the county of Suolk, and State of Massachusetts, have invented certain new and useful Improvements in \Vooden Pavements; and I do hereby declare that-the following, taken in connection with the drawings which accompany' and form part of this specification, is a description oi' my invention, suiiicient to enable those skilled in the art to practise it..

Pavements of wood are usually composed of prismatic blocks. having the end of the grain or fibre ot' the wood presented to the road-bed and to the travel on4 the paven'lent. Such blocks are usually' cut from large and consequently valuable ltimber, this adding materially to the cost of the pavement.

. My improved pavement is made up of cylinders-or cylindroids ot' wood, of small diameters, such as can be formed from young trees or saplings, of, say, from about four to seven inches diameter, of which a great quantity can be culled out 'from trees ot' larger growth, to the positive benetit of thc latter. Savin trees and cedars may also be utilized in my pavement, as being commonly trees of small growth, which are to he found in great abundance, and are very durable, as being less liable to decay than pine, spruce, and hemlock,or other woods of which wooden pavements are com monly made.

Butmy invention does not consist, broadly, in a paveinent made of blocks in the form of wooden cylinders placed with the grain or fibre in a vertical direct-ion, as such paven'lents have before been made'.

My invention consists in a pavement made up oi wooden cylinders or cylindroids, cut with their ends parallel and inclined in the same direction to the axis of the cylinders, so'that theI grain ofthe wood shall be inclined to the road-bed and to the travel on the pavement, and in scoring vthe cylindroids, or the blocks described, preferably on but one side ofeach block,` though they maybe scored on opposite sides, so that when the rows of blocks are alternately inclined in opposite directions, the blocks of one row interlock with the blocks ofthe rows adjoining on either side, and thusone block supports its neighbors, and is prevented from vertical displacement, and also prevents vertical displacement of the adjoining iuterlocked blocks.

Figure l, of the drawings, shows in side elevation two rows of blocks in a pavement embodyingr my invention, the row nearest the eye being shown in full lines, and the row bevond, in the rear, partly in dotted lines; w

Figure 2, shows an end view of' four rows oi' a pavement embodying my invention; and

Figure 3 shows in plan a portion of my improved pavement.

Figs. 2 and -showing the blocks as interloclied by reason of'being scored on one side.

It will be obvious that within certain limits, the deeper the scoring,Y on the. side or the sides of each block, the closer the rows of blocks will be brought togetherin one direction, and thc smaller will be the interstices left between them, and zthe `,'reatcr will be the area of act-ual wood in the pavement, and thel smaller will be the amount ot' cement or sand or gravelfillingl between the pavement-blocks.

lhe acute-angular edge of the upper end of' each block may be removed, it' desired, to afi'ord additional holding-scores or depressions for the feet of horses.

I claim a wood pavement, composed of cylinders or cylindroids, the adjacent rows of which are scored on one or both sides, and are interlocked and inclined in opposite directions.

A LBERT BETTELEY.

Witnesses J. B. CROSBY,- FnANols GoULD.

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