| 摘要 |
1309027 Building blocks R S KOTZUR 17 June 1971 [18 June 1970] 28562/71 Heading E1B A building element 1 formed from bent metal sheet and comprising spaced end walls 2, 2' and opposed side walls 3 (3') is open at its top and bottom and has a necked portion at its top, formed by six flanges 4, which telescopically engages the bottom of a similar element in building a wall. Tabs 11 including resilient nipples 12 pass through slots 13 to hold the elements engaged. The flanges 4 are formed with angled extension flanges 6 which are welded together at the corners. The element is generally rectangular and about four times as long as wide, but it may be half this size and arcuate blocks may be provided. |
