US149658A - Improvement in artificial-stone pavements - Google Patents

Description

s. s; INGALLS.

Artificial-Stone Pavements.

Patented April 14,1874.

NOA 19,658,

UNITED STATES Par FFIGEC SAMUEL S. INGALLS, OF OHIOAGO, ILLINOIS.

I'MPROVEMENT IN ARTIFlCIAbSTONE PAVEMENTS.

Speoification forming part of 'Letters Patent No. 149,658, dated April 14,1874; application filed September 19, 1873.

To all whom it may concern Be it known that I, SAMUEL S. INGALLS, of Chicago, county of Cook and State of Illinois, have invented a new and useful Improve. ment in the. Formation of Sidewalks of Portland Gement or Artificial Stone, of which the following is a full, clear, and eXact description, reference being had to the accompanying drawing making part of this specification, in which- Figure 1 is a plan or top View of a section of my improved Walk, broken away in part for the purpose of showing the interlocking spurs and grooves. Fig. 2 represents a vertical section through the same. Fig. 3 is a perspective view of one of the blocks detached, showing a groove formed upon one side, and a rib or spur upon the other side. d

p similar letters of reference denote corresponding parts wherever used.

My invention relates to a novel construction or method of forming the sections or blocks of artificial-stone or cement pavement as they are laid, whereby, after they becomehardened or set, they are prevented from becoming uneven, or from being thrown out of a common plane on their snrface, by the action of frost or from other cause; and consists in providing the blocks, in the process of laying, withinterlocking spurs and soclets or tongues and grooves, by which means all relative movementof the blocks to each other at the edges or joints is effectually prevented.

In the accompanying drawiugs, A represents a forming-block, made of wood or other suitable material, consisting of a series of triangular or half blocks connected together, forming salient angles a, as shown, of about ninety degrees, with the two faces converging thereto, provided with tongues or spurs a'. These tongues or spurs a' are, by preference, made, say,'fro1n one and one-fourth to one and one-half inch in width, and from one-half to fiVe-eighths of one inch in depth, and in the convex or semi-elliptical form shown, but may,

. of course, be Varied, according to the size of stone or blocks to be laid, and eXtending to within two to four inches of the angles of the squares, leaving straight Vertical joints at such corners or angles. a

With these blocks arranged with the points a touching the eurb or border of the pavement on one side, the cement or composition to form the block B is introduced, and, being firmly pressed and compacted within and between the forming-blocks and the curb, reoeives the impression from and has grooves b formed within its edges, corresponding to the tongues upon the forming-blocks. After the formingblocks A are removed, and while the edges of the blocks B are still wet, they are sprinkled with air-slaked lime, or some equivalent material, which will adhere readily While the blocks are wet, while at the same time it prevents the too i close adherence of the adjoinin g blocks, and provides for the slight eXpansion of the blocks. The forming-blocks A, after being removed, are again placed in position, with the points a opposite and touching those of the blocks last laid, and with the tongues facing grooves iu such blocks; and the process is repeated until the pavement is completed, or until all except the portion represented by the forming-blocks at the edges is laid, which are afterward filled, When such blocks are removed.

Removable strips may be employed, in connection with the forining-blocks A, when layin g the last row or series of full blocks B, in such manner that, When said strips are withdrawn from between the forming-blocks and the curb, the formingblocks can be backed ont, and their place, as also that of the removable strips referred to, can then be filled in with the cement, thus completing the pavement.

In practice, I usually employ beveled strips O, provided with a flap or apron, O'; the strips O for forming an open-surface joint between the adjacent blocks, to be filled with a narrow strip, of difi'erent color or different material, to represent the line of cement or mortar between A blocks of solid stone, and the apron O', where difierent colors are used, to prevent discoloration of one block while layin g another ad j acent thereto. e

Where the open joints are left, as described, these are filled with the desired material by the use of slotted plates D, placed with the slot d over and coinciding with the open joint, and through which the desired material is pressed into and made to fill said joint, as shown, the plate D preventing the discoloration of the edges of the blocks.

The blocks B may, of Course, be made in any usual or preferred form, and may be made of any of the usual or known materia-Is for form ing blocks of artificial stone.

Having now described my nvention, What I claim as new, and desire to Secure by Letters Patent, as an improvement in sidewalks of artficial stone, is

The blocks B, of artificial stone, provided with interlocking tongues a' and grooves b,

formed iu the process of layng, substantially as described.

In testimony Whereof I have hereunto set my band.

SAMUEL S. INGALLS. Witnesses:

A. W. GRAY, M. D., CHAS. SABIN.

Images