US2303741A - Checkerwork structure - Google Patents

Description

Dec. 1, 1942. H. R. HILLER ETAL CHECKERWORK STRUCTURE 2 Sheets-Sheet 1 Filed April 18, 1942 INyENTc 2 7 .ATTORNEYS Y Dec. 1, 1942. H. R. HILLER ETAL CHECKERWORK STRUCTURE 2 Sheets-Sheet 2 Filed April 18, 1942 SECTION-N- SECTIONM- mvEN gR s BY /z 3 12/424. 5 I Maw M22 ATTORNEYS Patented Dec. 1, 1942 2,303,741 cnnoxanwonx srnuc'roan Harvey R. Biiler, Chicago,

Ill., and Herman W.

Weber, Richmond Heights, Mo., assignors to Laclede-Christy Clay Products Company, St.

Louis, Mo., a corporation of Missouri Application April 18, 1942, Serial No. 439,498

l Claim.

This invention relates to checkerwork for regenerators and such like structures, and consists in an assembly of blocks or tiles of a few simple shapes, easily fabricated, inexpensive and durable under handling, that is adequate, secure, and adaptable in satisfying such specifications as the user may require.

In the accompanying drawings Fig. I is a view in perspective, showing analytically the structure of the checkerwork of the invention; Fig. II is a view of the structure in longitudinal section; Fig. III a view in transverse section. The portion of Fig. III to the left is upon the plane of section indicated at M, Fig. H, and the portion to th right is in the plane N. Figs. 1V, V, and VI are views in plan and in elevation of particular tile shapes used in the structure; and Figs. VII and VIII are views in elevation of tiles, otherwise corresponding to those of Figs. V and VI, but differing in one dimension, and so adapted to aiford variety in the structure.

The checkerwork of the invention will ordinarily be built within a cubical cell I, and will rest upon arches 2, as indicated in Fig. I.

We provide tiles A, such as shown in Fig. IV,

of Greek cross shape in plan. These tiles are in overall thickness such as ordinary tile for this use-a thickness here given, by way of example, of 2 inches. In length these tiles define one .dimension of the flues, and here, by way of example, the length is 9 inches. In height these tiles may for example, be 4% inches. The cross shape is aii'orded by re-entrant square-covered recesses at the four vertical edges of what otherwise would be a simple parallelopiped. These recesses, in the direction of the length of the tile, are 1% inches deep-one half of the thicknessof the tile itself;and, in the direction of the thickness of the tile, they are of suflicient depth to afford support for the transverse tile presently to be described. Here, for example, the depth is shown to be an inch.

In the building of the checkerwork we set tiles A in end-to-end succession, in courses that intervene between courses of tile D and E, of plain parallelepiped shape; and thus we form a succession of longitudinal walls 3 that are continuous and imperforate but are formed with a succession of horizontally extending lines of mortises 4. In these mortises rest as tenons the ends of the transversely extending tile that divide the spaces between the walls 3 into flues. The walls 3 extend in parallelism and are spaced at suitable intervals-8 or 8 inches, for example.

Fig. V, of Greek cross shape in elevation. These tiles will conveniently be or the standard thickness 2% inches. In length, these tiles correspond to the spacing of the walls 3. If that spacing be 8 inches, the tiles B will in the body portion be 8 inches long, while the arms of the cross extending half an inch farther, will give an overall length of 9 inches. Re-entrant square-cornered notches at the upper and lower corners will be half an inch deep in the direction or the length of the, tile; while the vertical extent of the notches will be such as to leave the arms of the cross 4 inches in their vertical extent-a dimension that corresponds to the vertical extent of the mortises in the walls 3. Inthis case the overall height of the tiles B is 6% inches.

In building the 'checkerwork courses of tiles A I are set upon courses of tiles D. Tiles B then are placed, bridging the spaces between the courses of tiles A, the arms of the tiles B entering as tenons the mortises formed by and between the meeting tiles A, the arms of the tiles B resting upon the edges of the tiles D. When the tiles B have so been placed, one or more courses oi plain parallelepiped tiles E are set upon the course of tiles A, and again a course of tiles A is laid. Then again tiles B are set as before, and so the building progresses.

The notches in the corners of the tiles B are here shown to be 1% inches in vertical extent. Accordingly, if the course or courses that intervene between courses of tiles A be greater in vertical extent than 2% inches (as ordinarily will be the case, and, as here shown, is the case) the tiles B in vertical succession will stand apart, as indicated at a and b, and the flues in the checkerwork will be thus interconnected, as is commonly desirable. It is manifestly, however, a matter of dimensions, so to design the component tiles that the tiles B shall come to edgeto-edge contact vertically, and in such case the transverse walls as well as the longitudinal walls -will be continuous and imperforate.

Preferably we provide tiles B, such as shown in Fig. VII serves to indicate shorter tile C that may be used in place of tiles B, to bridge the space between walls 3, if those walls be set at correspondingly smaller intervals.

Figs. VI and VIII serve to show that half tiles B and C, corresponding in other respects to tiles B and C, may be provided for conveniencea well-known expedient in masonry.

- Marginal tile 5 and 6 of special shape may be provided to complete a tight structure within the cubical cell I. Blow holes 1 may be provided in the cubical walls, as is usual, for blowing from of tiles of rectangular paralleloplped shape, with 10 intervening courses of tiles 0! Greek croee shape in plan, whereby opposite mortise: are iormed in opposed faces of two such wells, and tiles of Greek cross shape in side elevation extending transversely between the two wells, with the arms of the cross lying as tenons within the opposed mortises, and forming with the walls vertically extending flues. 3

HARVEY R. KILLER. HERMAN W.

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