US918156A - Road construction and art of making same. - Google Patents

Description

P. S. HUTGHINSON. ROAD CONSTRUCTION AND ART OF MAKING SAME.

APPLICATION FILED MAY 18, 1908.

Patented Apr. 13, 1909.

FRANK S. HUTCHINSON, OF FL U SH ING, NEW YORK.

ROAD GONSTRUGTION -AND ART OF MAKING'SAME.

Application filed kay 18,

To all whom it may concern:

Be it known that I, FRANK S. HUTcHiN- son, of Flushing, Queens county, New York, have invented a new and useful Improvement vin Road Construction and Art of Making Same, of which the following is a full, clear, and exact description.

My invention relates to improvements in the construction of highways, and the object of my invention is to produce a comparatively simple and inexpensive road which can'be laid without the use of expensive machinery, and in which the fine materials of the road are sealed in with the coarser parts so that a smooth permanent surfaceis formed.

Usually in road construction of the macadam or telford type, broken stone of coarser and gradually finer sizes are laid in the road, rolled, the voids filled with the sand or finer crushed stone, the materials being finer as they approach the surface. Sometimes the surface is also provided with a binder of some sort, but generally the fine material used to fill the voids between the coarser particles is not provided with adhethe road is practically ruined; This is especially true in recent years where so many fast automobiles are used, as these vehicles move with such rapidity that the suction caused has a tendency to draw up the finer materials of the road-bed, and so the road is rapidly ruined. Moreover, the tires of these heavy vehicles have a tendency to break up the surface, and once the surface is brokenthe finer parts of theroad are quickly removed.

My inventioncontemplates the use of a binder, preferably of bituminous materials such as coal tar or as halt, and I use it in such a way as to stic together the whole body of the. road and form a seal over the coarsera'parts, thus preventing the breaking up of thel road' and the sucking up of the finer particles. In carrying out this idea,'I provide a layer oflbroken stone, preferably of a practically uniform, size, and fill the voids betweenthe stone with sand, gravel, or finely crushed rock. Over this I spread 'a quantity of 'ther bituminous binder above W mentioned, and the fine materials in the Specification of Letters Patent.

Patented April 13, i909. 1908. serial No. 433,500.

,' voids absorb the binder and cause the-larger and smaller particles to closely adhere. I I use more than suflicient binder to coverthe broken stone and into the covering'of binder I roll the finer covering of the road, which is preferably of crushed stone, and thus a complete roadway is provided which is cheap, easily laid and durable, The details of this structure will be shown more clearly in the descri tion which follows.

Reference is to be had to the accompanying drawing forming a part of this specification. r

The figure is a broken cross section of a road-bed showing my improvements.

The road-bed can be made with one, two, or more courses of broken stone. Where a single layer of the broken stone 10 is used,

particles are referably of a uniform size, and after the layer is placed in position the stone is preferably rolled heavily so as to settle as much as possible. Over this layer of broken stone I spread sand, gravel, or finely crushed rock, which is brushed or otherwise thoroughly worked into the stone, and preferably so that none of the fine ma terial will appear above the stone surface, but rather should be just below the surface. Over this stone I then spread my bituminous binder of coal tar, asphalt, or analo ous materials, and this is taken up by the er filler form a homogeneous or compact bed. The binder'is put on in sufficient quantity to thoroughly saturate the surface of the filler and work up 'above the stone tops so as to be absorbed by the covering of crushed rock or other fine material which forms the surface of the road, and is thoroughly rolled so as to be incorporated with the binder, and thus a complete homogeneous mass is formed with the brokenstone and the filler at the bottom, and the binder and covering at the top, and it will be seen that the mass is so thoroughly fastened together that swiftly running vehicles-cannot possibly suck u the filler and that heav traflic will not quickly disturb the parts. I the road is laid in more than one course, the broken stone or rock is placed at the bottom and rolled, a second course of broken stone laid over this, and the filler applied to the second course, after which the binder and covering are applied as clearly specified.

this is applied in the usual way, though thebetween the stones so that the stones and ios aware that the binder has been used in connection with a filler for the broken stone and in a way to be incorporated with the covering as specified, whereby a practically uniform solid mass with a dense, fine, coherent covering is produced.

It will be seen that no expensive machinery is needed to lay this road, but that the ordinary crushed stone is used, and a roller is the only implement needed to produce a perfect road-bed. v

Having thus fully described my invention,

I claim as new and desire to secure by Letters 15 Patent The herein described improved roadway,

comprising a layer of broken stone, a fine FRANK S. HUTCHINSON.

Witnesses:

WARREN B. HUTCHINSON, WILLIAM S. DENIsoN. I

Images