| 摘要 |
999,733. Swings. D. SEBEL & CO. Ltd. March 9, 1964 [March 8, 1963], No. 9220/63. Headings A6M and A6S. A swing framework comprises two inverted U-shaped members 1, 2 pivotally connected by arms 20 of pivot members 12 engaging apertures 17 (Fig. 3) in brackets 13, which brackets may be locked in a predetermined angular position with respect to each other, when the framework is erected for use, by arms 21 of the pivot members 12 engaging further apertures 19 in the brackets. The brackets may be welded to the U-shaped members. The members 1, 2 may have detachable lower portions 4.
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