US1019228A - Building-block. - Google Patents

Description

E. L. DOBBINS.

BUILDING BLOCK.

AIPLIOATION FILED FEB. 14, 1908.

Patented Mar. 5, 1912.

$1 4/ 2/2 g p/ Q/ Z M EDWARD L. DOBBINS, or JEWELL, KANSAS;

BUILDING-BLOCK.

Specification of Letters Patent.

' Patented Mar. 5, 1912.

Application filed February 14, 1908. Serial N5. 415,933.

To all whom; it may concern:

Be it known that I, EDWARD L. DoBBINs, a citizen of the United States, residing at Jewell city, in the county of Jewell, State of Kansas, have invented certain new and useful Improvements in Building-Blocks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to improvements in cement building blocks, and more particularly to articles of that class designed especially for use in the construction of chimneys, it being the general object of the invention to provide a series of such blocks adapted when mounted one upon another, to form a chimney which is to all intents a single solid homogeneous structure.

To this end, the invention resides in the provision of a cement block comprising spaced inner and outer walls and a series of spaced members connecting the same and cast or molded integral therewith, the upper and lower faces of said members being spaced from the corresponding edges of the walls so as to form cement receiving cavities between said walls which communicate with the spaces between said members, thus permit-ting the cement to fill said cavities and spaces and form a monolithic lock be tween the superposed blocks.

The invention will be readily understood from a consideration of the following detailed description, and its preferred embodiment is illustrated in the accompanying drawings, in which corresponding parts or features, as the case may be, are designated by similar reference numerals in the several views.

Of the said drawings: Figure 1 is a perspective view of the improved block. Fig. 2 is a vertical section taken on the line 2-2 of Fig. 1. Fig. 3 is a vertical section taken on the line 33 of Fig. 1.

Referring more particularly to the drawings, the block illustrated therein is shown as comprising a rectangular inner wall 5 surrounded by and inclosed within a similarly-shaped outer wall 6, said walls being arranged in spaced relation to each other i and connected together by corner pieces 7.

The walls and corner-pieces form an integral structure which is cast, molded or otherwise constructed as preferred.

The corner-pieces are L-shape'd in horizontal cross section. The height of one wall is equal to that of the other wall, while the height of the corner-pieces is less than that of the walls, as shown, the upper and lower faces of the corner-pieces being in consequence, spaced fromthe corresponding edges of the walls, the upper faces of the cornerpieces lying below the upper edges of the walls, whose lower edges extend below those of the corner-pieces.

The open spaces 9 between the cornerpieces, as well as the open spaces or cavities 8 between the upper and lower faces of the corner-pieces and the corresponding edges of the walls, are adapted to be filled by a binder 10 of plastic cement, as hereinafter described.

In the construction of the chimney, the blocks are superposed one upon another, until the required height is reached; plastic cement is then poured through the openings 9, filling the same and the mating open spaces or cavities 8 between adjacent blocks. The cement binder on setting thus forms a solid monolithic lock between the blocks, as will be apparent, the provision of the spaces or cavities 8 affording a materially increased area of contact for the cement with the blocks and' proportionately strengthening the joint between the same.

The space inclosed by the sides of the inner wall of the completed chimney forms a passage 11, for the products of combustion.

While'the blocks are designed primarily for use in the construction of chimneys it is to be understood that they may be used. with equal facility in the construction of culverts and drain pipes, in which latter instance, the inner and outer walls of the block are in the form of concentric circles in cross section, as shown in Fig. 4:.

What is claimed is:

1. A building block for chimneys comprising a unitary structure having an outer wall, an inner wall concentric with and spaced from the outer wall, said inner wall being of equal height to the outer wall and the terminal faces of said inner and outer walls lying in the same plane, spacers between said inner and outer walls and spaced around the inner wall, the terminal faces of said spacers being spaced from the adjacent terminal faces of the walls at equal distances, and the confronting faces of said Walls being beveled continuously from the planes of the terminal faces of the spacers. 2. A structure comprising a series of superposed building blocks each comp-rising a unitary structure having an outer wall, an inner wall concentric with and spaced from the outer wall, said inner Wall being of equal height to the outer wall and the terminal faces of said inner and outer walls lying in the same plane, spacers between said inner and outer walls and spaced around the inner wall, the terminal faces of said spacers being spaced from the adjacent terminal faces of the walls at equal distances, and the walls whereby the filling is provided with a series of opposed pairs of lnner and outer circumscribingribs constituting means to lock the blocks firmly together.

In testimony whereof, I affix my signature, in presence of two witnesses.

EDWARD L. DOBBINS.

Witnesses:

WM. G. MOINTYRE, E. A. BODDING.

Copies of this patent may be obtained for five cents each, by'addressi'ng the Commissioner of Patents, Washington, D. G.

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