USRE3274E - Improved pavement - Google Patents

Description

' designated by the letter G representing the `the street, these blocks being cut square at across the street close against the first tier of square-ended blocks is set up, as before, and

. M. STOW, OIWSAN FRANCISCO, CALIFORNIA.

. IMPRovnn PAVEMENT.

Specijcat'iou jbl-ming part Qf Letters. Patent No. 72,110, arteall December 10, 1867 reissue y No. 3,274, dated January 19, 1869.

To all lwhom 'it Imay'crmcern Be it known that I, HENRY M. Srow, of the city and county of San Francisco, in thel State of California, have invented a new and useful Improvement n Pavements for streets, sidewalks, and ground and cellar iloors and Ido hereby declare that the f "llowing is a full, clear, and` exact description thereof, reference being had to the accompanying drawings, and to the letters andgures of reference marked thereon. l Figure ,A is a perspective view of a section of my street pavement, that part of the ligure The said wedge-shaped blocks No. 2 may be made of the same length asthe blocks No.1,and may be driven down until their upper ends reach about the center of said blocks No. 1, as shown in Fig. A of the drawings, in which ca-sc the open spaces above them, between the blocks N o. 1, are to be filled than the blocks No. l and driven down until their' upper ends are only half or three-fourths of an inch, or thereabout, below the upper ends of blocks No. 1, leaving shallow grooves, merely to give a foothold for horses and other animals traveling on the pavement. The said blocks No. 1 should be from four to six inches long, (or deep,) about three inches thick, and of any convenient width. The blocks N012 may be about one inch thick and of any convenient width. But I do not limit myself to these dimensions.

The blocks should be set so as to break joints. The driving down of the wedge-shaped blocks, as described, packs the sand or earth so compactly that `the most heavily laden wagons passing over'the pavement will never occasion any unevenness in the surface thereof. The sand or earth forming the foundation-bed should be thoroughly wet when the blocks arc put down. The blocks, when of wood, are to be so formed and set in the pavement that the be vertical, and they may be saturated with coal or gastar, or any liquid hydrocarbon or other resinous sub stance which will tend to preserve the wood from decay, before being set in the pavement. When the blocks are suficiently hammered down, the whole surface of the pavement should be thoroughly saturated with boilinghot coal-tar, asphaltum, pitch, oil and asphaltum, or other pitchy substance, and covered with clean sand at least haltau inch in thick ness.

When the foundationbed is composed of sand or loose sandy earth, it will not bc absolutely necessary to bevel the lower ends of the blocks No. 2, as even square-ended blocks will operate as wedges, and on being driven downv into Vthe foundation-bed will pack the same sulciently. I prefer, however, to make pavement in process of construction and that part designated by C' representingit as completed. Fig. B is a perspective view of a section of my improved pavement as adapted to sidewalks, ground and cellar floors.

The nature of my invention consists in putting down a pavement of wood or other suit- .or loose earth, and packing the sand or earth by means of wedge-blocks driven down into the same, and forming a part or the whole of the pavement In constructingthe streetpavement the street is rst filled with clear sand, loam, or loose earth, free from stones, to within about four to six inches of the desired street-grade, (according to the length of blocks,) and smoothed oil" soas to conform to the desired arch or crown ofthe street. Thenblocks of wood or other suitable material, marked No. 1' in the drawings, are seton their ends in a tier across both ends. Next, a tier ot' blocks, marked No. 2 in the drawin gs, made Wedge-shaped at their lower ends by lieveling on c ne side, is set square-ended blocks, and then another tier of so on alternate tiers of square and wedgeshaped blocks are placed until a space of ten the upper ends are below the upper endsA of the square-ended blocks No. 1 and the foundation is of the desired compactness.

with gravel; or the said blocks No. 2 may' be made some two or three inches longer blocks, when ot' wood, be sawed orY dressed similar to those shown in the drawings, or into the form of continuous blocks or r'bs running the blocks to be driven downinte the feunda tion-bed wedge-shaped at their lower ends, as described. l

Nor is it absolutely necessary that lthe `inches long. ,But I do notlmitniyself in either case to any'speciic dimensions. The blocks should be set so as to break joints in all cases, whether for street pavements, sidewalks, or iioors. w j

I do not'elaim leaving a space between the vupper portions of the square-ended blocks No. 1 and llingsaid space with gravel, as 1 am advisedthat is not new, but is covered by the patent granted to Samuel Nicolson, August 8,1854, and the reissues thereof 5 but What I do claim as my invention, `and de'- sire to secure by Letters Patent, is-j- 1. A pavement composed of alternate tiers of square-ended and wedge-shaped blocks, the wed geshaped ends of the latter being driven into a foundation-bed of sand or earth, substantially as and for the purpose described.

' 2. A pavement composed of blocks with lower ends wedge-formed, and all driven down into a foundation-bed of sand or earth, substantially as shown and described. Y

3. A pavement composed of wood, or in whole or in part of other suitable material,

into regular forms andset in regular tiers, as a very` good cheap pavement, involving the principle of my invention, may be made of blocks of split wood, of irregular form, seton their-v ends, and a proper proportion of them, at regular intervals, (as near as may be,) driven down into the foundation-bed, so as to produce the requisite packing of the same.

While I regard my invention as most appropriatelyapplicable to wooden pavements, it is manifest that said blocks No. 1 may be of dressed stone, or 'ot' a concrete composition, molded into the form of blocks, of dimensions clear across the street, or any-portion of said distance, and the blocks No. 2 may ybe of dressed stone, brick, or wood, vor of any suitable material that will bear driving down into the foundation-bed. l For sidewalks and ground or cellar doors, I make all of the blocks ot' the same length and thickness., land make the lower ends all of wedge form, by beveling one side, as shown in Fig.- B. For sidewalks, I make the blocks from two to four inches in thicknessand from vfour to six inches long but for floors of buildings, I prefer to makethem larger, say, from four to six inches wide and from six to twelve earth, as described, and a portion of theblocks driven down into said i'oundation'bed to pack the same, substantially as and for the purpose specified.

HENRY- M. STOW.

Witnesses:

J. J. OooMBs, Jos. L. Cootnzs.

laid on a foundation-bed of sander loose

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