Improvements in the Construction of Hollow or Tubular Building Tiles

15,960. Wie, E. E. van, and Jacob, J. J. July 21. Building-blocks for arches, columns, culverts, walls, &c. Longitudinal slots 2 are made in the tubes 1 for about half their length, and grooves 3 extend from the slots to the ends of the tubes. The grooved portions of the tubes slide in the slots...

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Hauptverfasser:	JOSEPH JOHN JACOBS, ELMER ELLSWORTH VAN WIE
Format:	Patent
Sprache:	eng
Online-Zugang:	Volltext bestellen
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