US500273A - Wilhelm schlichting - Google Patents

Description

-(No Model.)

W. SCHLIGHTING.

PAVEMENT. No. 500,273. Patented JuneZ, 1893.

UNITED v STATES PATENT OFFICE.

WILHELM SCHLICI-I'IING, OF HAMBURG, GERMANY, ASSIGNOR TO CHRISTIAN OLAUSSEN, OF SAME PLACE.

PAVEMENT.

SPECIFICATION forming part of Letters Patent No. 500,273, dated J' une 27, 1893.

Application filed ,Tune 30, 1891. Serial No. 397,980l (No model.) Patented in France November 25, 1890, No. 209,769,l in Germany November 26,1890,N0. 58,087; in England -I'ehruary17, 1891,No. 2,894; in Belgium June 18,1891, No. 95,332; in Austria-Hungary September 80, 1891I No. 19,075 and No. 40,384. and in Italy September 30, 1891,1To. 29,958.

To @ZZ whom it may concern:

Beit known that I, WILHELM SOHLICHTING, of the city of Hamburg, in the German Empire, have invented a new and Improved Pavement, (for which Letters Patent have been granted as follows: in Germany by Patent No. 58,087, dated November 26, 1890; in France by Patent No. 209,769, dated November 25, 1890; in England by Patent No. 2,894, dated Febru- Io ary 17, 1891; in Austria-Hungary by Patent No. 19,075 and No. 40,384, dated September 30, 1891; in Belgium by Patent No. 95,382, dated June 18, 1891, and in Italy by Patent No. 29,958, dated September 30, 1891,) of which I5 the following is a specification.

This invention consists in a new or improved pavement suit-able more especially for roads. The paving consists of a foundation of concrete with a covering layer of asphalt zo within which latter are embedded forged or wrought iron ribs set on their edges and of the same height as the thickness of asphalt. The concrete is preferably about twenty centimeters thick and the asphalt about four centimeters thick but these dimensions may be varied according to the heaviness of the traine. The ribs are constructed of fiat iron, generally of a depth of about forty millimeters (being the depth of the asphalt) but all of uni.

form depth and of a thickness of about four millimeters but also of any thickness about from four millimeters to sixteen millimeters or even more at special places of the road accordingto requirements. The ribs are placed 3 5 to cross each other and for this purpose are provided at equal distances with notches of a width equal to the thickness of the iron and extending from the one edge as far as the center line of the ironrib. The distance of the notches is equal and is as a rule about six centimeters from center to center. The last notches are about three centimeters removed from the ends of the rod. Each rod having in it six notches as a rule, its length is therefore thirty-six centimeters according to the above and six parallel rods being placed cross- Wise over six other parallel rods, the notches t one in the other so that they thus hold together without other fastening and form a square lattice-like frame. Besides this com- 5o plete or square frame with ribs, half or triangular frames are constructed in a similar manner.

The paving is laid or made by first spreading on the complete and hardened foundation of concrete, a layer of asphalt or so called asphalt paste of about twenty millimeters thickness. Before this layer becomes hardened the frames, previously heated, are placed thereon so that the rods are located diagonally 6o to the direction of the road or length of the pavement. It will thus be necessary in the case of all lines such as curbstones, tram-rails, &C.,traversing the road in longitudinal cross direction to ll up the gaps left uncovered by the square frames by the half of triangular frames and in this case it is preferable to use frames made with stronger rods or ribs especially next to tram-rails. The separate frames need not be placed absolutely in contact one 7o with the other but nevertheless are so placed that the rods or ribs of each frame are in a line with those of the next. When the heated frames have been placed in proper arrangement on the asphalt they are pressed in by means of heated iron bars as far as the concrete foundation and then a second layer of asphalt is applied having likewise a thickness of twenty millimeters, its upper surface being leveled with the upper edge of the iron ribs 8o of the frames.

In the accompanying drawings Figure 1 is a plan and Fig. 2 a cross section of the paving. Figs. 3 and 4 are illustrations of a part of the rib frame and of a rib thereof respectively on a larger scale.

A shows the concrete foundation, B the asphalt and C the forged iron ribs which may be combined to cover squares or triangular spaces as C or rectangular figures other than 9o squares such as C2.

One advantage of this invention is that the bars being of uniform depth of the pavement preserve the uniform structure throughout its depth at every stage of wear, and another advantage is that all the bars run diagonally to the length of the pavement so that the Wheels of carriages roll over them without any conoussion.

What I claim as my invention, and desire 5 to secure by Letters Patent, is-

In a pavement, the combination with a foundation of concrete, of a framework consisting of iron or steel ribs of uniform depth set edgewise and Crossing one another diagro onally to the length of the pavement, said framework resting upon the concrete foundation and forming the wearing surface of the pavement, and a surface layer of asphalt between said ribs and substantially flush with the tops thereof, the said surface layer form- I5 ing a foothold and resting upon the concrete foundation, substantially as herein set forth.

WILHELM SCHLICHTIN G.

Witnesses:

F. ENGEL, A. SCHAPER.

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