US1278194A - Construction-block. - Google Patents

Description

E. G. NELSON & J. LANDECK.

CONSTRUCTION BLOCK. APPLICATION FILED MAY 8, I916.

Patnted Sept. 10,1918.

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Specification of Letters Patent.

Application filed May 8, 1916. Serial No. 96,214.

- To all whom it may concemr Be it known that we, EMiL G. NELSON and JOHN Lh gnnox, both of whom are citizens of the United States, residing at What Cheer, in the county of Keokuk and State of Iowa, have jointly invented certain new and useful Improvements in Construction- Blocks, of which the following is a full, clear, concise, and exact description, reference being had tothe accompanying drawngs, forming a part of this specification.

7 Our invention relates to construction blocks,and more specifically to blocks of burnt earthenware for building up hollow cylindrical or tubular structures such as sew ers, drains, silos, etc.

Among the objects of our invention is, to

provide an improved construction block such that a structure built up of these blocks would have no continuous longitudinal joint, and such that a conduit constructed of these blocks may be laid up without forms and without back filling until the entire conduit has been laid and. accepted by the engineer.

In the drawings, in which one embodiment of our invention is shown;

Figure 1 is an end view of a hollow cylindrical structure built up' of interlocking blocks; j

Fig. 2 is a side elevation of the structure;

Fig. 3 is'a perspective view of one of the blocks; and

Fig. 4 is a view of the edge of the block. Referring to the drawings in detail the cylindrical structure 10 is built up of blocks 11 which are exactly alike. with the exception of those at the begiiming and end of the structure which must be formed specially in order to bring the edges of the blocks flush with each other at these points.

- Each of the blocks 11 is curved to conform to the diameter of the structure which is to be built up andis made hollow being provided with two longitudinal passages 12 and 13. The block has two longitudinally extending ribs 14 extending within the passage 13 the purpose of which will appear hereinafter. One edge of the block is provided with a tongue 15 which forms a dovetailed joint with a groove 16 at the edge of an adjacent block. The block is cut away along the lines 17 and 18 to form a rentrant angle to receive the corner ofan adjacent block. This construction results in breaking the joints bothlongitudinafly and transversely so that there is no continuous joint either longitudinally or. transversely.

Another edge portion of the block is provided with tapering tongues 19 and 20 which engage a corresponding groove 22 in an adacent block to properly position the blocks Patented Sept. 10, 1918.

with respect to each other and hold them in position. Theblock is cut away on the line 18 so as to leave a groove 23 along this edge, the walls of which are a continuation of the walls ofv the passage 13 and this groove 23 receives a correspondingly shaped tongue on the edge of an adjacent block. These blocks may be shaped by forcing the material, prefera; ly a clay or clay mixture, in a plastic state out through forming plates which give to the block'its transverse section, and these blocks may then be vitrified if desired.

In building up the structure the blocks are placed in posltion by placing the tongue 15 in position to enter the groove 16 of the block already in position and sliding the block into position longitudinally until the tongues 19, 20 enter the groove 22.

Blynbreaking the joints longitudinally the Wea ess of a structure which has a continuous longitudinahjoint is avoided, as such structures are likely to failalong the line of the longitudinal joint.

. Referring to Fig. 2 it will be noted that there are two blocks interposed longitudinally between blocks having their edges in alinement.

.Because of the dove-tail connection between adjacent blocks and the breaking of,

the joints longitudinally a conduit of these blocks can be built up without forms and without back filling until the entire conduit has been laid up and inspected.

Having thus described our invention what we claim as new anddesire to secure by Letters Patent is 1. A. construction block having an edge.

having a rentrant angle to receive the cor- Her 0 an adjacent block, the edge along one leg of said rentrant angle being grooved .to receive the tongue of an adjacent block, said block having a longitudinally extending passage therethrough, the walls of said groove being continuous w1th the walls of said passage.

2. A construction block having a reentrant angle on one end, the upper leg of said angle having a tongue and the lower leg being grooved, the said block halving a passage extendin therethrough, the walls of said passage ein continuous with the walls of said groove, t e said block having a continuous groove on its opposite end and upperadjacent said angle having a. passage ex tending longitudinally through the said block, j l

Inwitnes's whereof we have hereunto subscribed onr, names;

. V EMIL G. NELSON. JOHN LAN DECK.

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