US295610A - Eobeet albeecht - Google Patents

Description

(N0 Model.) v

R. ALBRECHT.

WOOD PAVEMENT.

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ROBERT ALBREQHT, OF IlLSllv PRUSSIA, GERMNY.

woon PAVEMENT.

SPECIFICATION forming part of Letters Application iil'ed February l, 1884. (No model.)

, To all whomjt may concern:

Beit known that I, ROBERT ALBRECHT, a subject of the King of Prussia, Germany, residing at the city of Tilsit, in the Kingdom of Prussia, Germany, have invented certain new and useful Improvements in Wood Pavements, (which has been patented heretofore by the government of Great Britain under date of December 3, 1883, No. 5, 621,) of which the following is a specification.

Wooden pavements were heretofore made by placing the wooden blocks in parallel rows and filling the joints or interstices with liquid cement, tar, and sand. This construc- 1 5 tion, however, does not insure a firm and solid connection of the blocks, and in fact possesses so little durability and strength that a foundation or bed of beton or concrete is an absolute necessity, and hence wooden pavements laid and supported in this manner are quite expensive.4

In order to-furnish a cheap wood pavement, the first requisite is to dispense with the eX- pensive foundation of concrete; but inforder to allow this to be done it is also necessary to connect the individual wooden blocks with each other in such a manner that the pressure applied to an individual block is not transmitted by it directly upon the foundation,

" 3o but is distributed upon a series of adjoining blocks,and is dation.

, The "present .invention provides a wooden pavement in which the above-mentioned theory is carried out; and it consists in the con struction and combination of parts which will be hereinafter more fully described, and then set forth in the claims. .Y

In the drawings, Figure l is a perspective by them transmitted to the founl 4o view of a group of adjoining blocks secured together by interlocking metal stripsor tongues. Fig. '2 ,is a plan or top view of wooden paving-blocks supported on a foundation of unburned bricks. Fig. 3 is a ver- 45 tical transverse section representing a foundation composed of unburned bricks and two outer courses of burned brick, and showing a partial course of connected wooden blocks laid upon such found ation.V

` 5o Similar letters of reference vindicate corresponding parts.

Patent No. 295,610, dated March 25, 1884.

Patented in England December 3, 1853, No. 5,621.

The wooden blocks are provided at their` sides or longitudinal faces with a narrow groove or cut, a, into which is inserted astrip, b, of band-iron or other suitable metal, that serves to bind together the blocks of two adjoining courses or rows. The depth of the grooves or slits c has to be equal to half the width of the strips of metal employed. The drawings show the groove a located at the middle of the long side or surface of the block; but it may be also arranged somewhat higher or lower, as desired. By this method of connecting the blocks the downward pressure brought to bear upon any single or individual block is distributed upon the neighboring blocks in such a manner that the individual blocks no longer require a foundation of stone or bton. upon an earth foundation properly rolled or stamped to present a smooth and sufficiently hard surface, and then bind the blocks together by the strips in the manner described.

In place of the earth foundation, a foundation composed of unburned bricks or blocks of dried clay set in clay mortar may be used, which is only a little more expensivethan a foundation or bed of gravel, and which possesses all the strength of the latter.

In Figs. 2 and 3, D represents a foundation or bed formed of blocks of unburned the foundation adjoining the curbstone C, made of two courses, B B, of burned brick Set in cement mortar, the object of which is to rmly support the wooden blocks adjoining the curb, at which point, as will be readily apparent, only half of the downward pressure brought to bear upon the curb-blocks is transmitted to the adjoining blocks.

It is to be observed that the 4wear of a wood pavement laid in the manner proposed by me is much less than when the blocks are laid in the customary way, this being mainly due to the existence of an elastic foundation or bed, and the fact that the blocks are connected so as to bear the pressure and strain of travel over the same in uniform or equal manner. Having thus described my invention, I claim as new and desire tosecure by Letters :Eat-

ent-' y 1. A pavement composed of a foundation or It is sufficient to place the blocks clay; and V in the same figures I have shown a portion of bed of unburned brieks and of Wooden blocks laid upon said foundation and connected by interlocking metal strips inserted in side grooves of the blocks, substantially as described.

2. A pavementcoinposed of a foundation or bed composed of unburned brieks and an outer or Curb portion of burned bricks7 and of wooden blocks grooved in theirsides7 laid l

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