US22444A - Thegraphic co - Google Patents

Description

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R. MONTGGMERY, OF NEy YORK, N. Y.

IRON PAVEMENT.

Specification of Letters Patent No. 22,444, dated December 28, 1858.

To aZZ whom "it 'may concern:

Be it known that I, RICHARD MONTGOMERY, of the city and county of New York, in the State of New York, have invented a new and useful Improvement in Iron Pavements for Streets; and I do hereby declare that the following is a full description thereof.

To enable those skilled in the art to which my improvement belongs to construct and use my improvement I will now proceed to describe the same, reference being had to the annexed drawings and to the letters of reference marked thereon, forming a part of this specification.

In these drawings Figure l represents a perspective view of the arch which this pavement forms across the street; Fig. 2, represents a longitudinal and Fig. 3, a cross section of one of these arches; Fig. 4l, exhibits a portion of the ribbed surface of this pavement on a large scale; Fi 5, represents a modification of the plan o joining the arch plates as shown in Fig. l; Fig. 6, is a perspective view of one of the .inner corners of one of the arch plates; Fig. 7, is a top View of part of two arch plates when interlocked by means of dovetails.

It will be seen from Fig. l, that my pavement, when in place, resembles a continuous iron bridge, the curbstones m, m, answering as abutments to support the same. In this way but little weight is allowed to rest or bear at any one point upon the ground or earthen roadway.

The accompanying drawings represent the arches as being formed of two plates (A, B,) each, meeting in the center of the street on the line p, Q. Each arch however might be formed of one plate only reaching from curbstone to curbstone, without the central joint. The plate B, is provided with a vertical Hange Z), c, along its inner edge. This flange has a horizontal rib e, which projects beyond the edge of the plate B, and serves to support the inner edge of the other plate A.. The flange has another horizontal rib f, eX- tending backward for the purpose of strengthening the flange. The portions Z), c, of the flange projects beyond both edges Z, Z, of the arch, while the portion c, f, of the flange does not reach quite to the edges Z, Z, of the arch, thus forming a recess 5 1" c. at each end of the flange. The next arch which is intended to join the arch represented in Fig. l, would be similarly constructed, with the only exception that in that arch the ends of the portion c, f, of the flange would project beyond the edge of that arch and the ends of the portion b, c, of the flange will stop'short of the edge of the arch. Thus the ends of the flange of each arch are made to interlock with the ends of the-flanges of the adjoining arches.

The curbstone edge of each plate is provided with a llat horizontal face s, and a vertical flange i, the vertical flange to abut against the curbstone my, and the face s, to rest upon wooden sleepers ZL, g, which are laid along the curbstone the whole length of the street. The curbstone ends of the plates may be spiked to these sleepers if desirable, and may also be provided with suitable holes to permit the water to run olf into the sewers. Similar sleepers CZ, run along the center of the streetv and are properly grooved to receive the flanges Z), c, of the plates B.

The plates are covered with arched cor rugations a, a, which are all parallel and run across the street. The body of the corrugation is thicker on top as represented at a, 0;, Fig. t. The ends of the corrugations instead of meeting in one line may be made to interlock as represented in Figs. 5, and 7. If arranged on the plan last mentioned two or more of the corrugations of each plate may be dovetailed as represented at k, Fig. 7, for the purpose of uniting each two plates in the most substantial way.

On streets which are not very wide or over which only light vehicles are driven, the vertical flange z', may be dispensed with and the plates be constructed without it.

The space between the sleepers below the arches as well as the spaces between the top portion of the corrugations may be filled up with concrete asrepresented at n, n, in Figs. 2, 3, and 4L, if desired. Thus a smooth and even surface will be produced, and the corrugatediron surface is to a great eXtent protected from wear and tear.

In the modilied arrangement represented in Figs. 5, and 7 the interlocking ends of the corrugations lie across the flange Z9, c, so as to be properly supported. The advantages of this arrangement are many, especially when streets are to be laid out over ma de ground or light and yielding soil. Another great advantage of my pavement consists in its great durability. By forming the corrugations thicker on the upper face (see a, a, in Fig. 4,), and giving them a gentle curved or arched form, they resist great strain and at the same time will en` dure great wear. This arched pavement presents an even surface for carriages, omnibuses and drays, to pass over with the ease of a rail road, withoutthe present enormous wear and tear and the unnecessary con` sumption of -so much horse power. Again, by constructing pavements after my plan, a

lirm foothold is always aiiorded for horses, A,

since even if the top of the corrugations be comes much worn, there will still be suflicient space between the corrugations to receive the calhs of the horses shoe. There will be less liability of expansion and contraction in my pavement, than in any other iron pavement with which I am acquainted, inasmuch as the corrugations on the under side are always illed with moist earth, and as the surface thus exposed is very great, the heat of the sun upon the small partexposed to its direct rays, is counteracted to a great degree.

Having described my improved pavement,

what I claim as new in this application and desire .to secure by Letters Patent, is:

l. A metallic pavement consisting of a series of parallel arched corrugations reaclr ing or extending from the curbstone on one side of the street to the curbstone on the other side, substantially as shown and described.

2. I also claim casting or making the upper parts of the corrugations thicker than the lower parts, in the manner and for the purpose set forth.

3. I also claim supporting or anchoring the pavement, when it is cast in sections, by a grooved central support as shown and described'.

4. I also claim the dovetailed recesses and projections 7o, in combination with the projection b, c, for the purpose of holding the pavement in place.

R. MONTGOMERY.

IVitnesses Enw. F. BROWN, Trios. I-I. DODGE.

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