| 摘要 |
501,433. Ball joints. MENSE METALLWARENFABRIK, O. May 24, 1937, No. 14378. Void. Convention date, May 23, 1936. [Class 65 (ii)] [Also in Group XIV] A jointed lamp bracket comprises a number of tubular arms 5 connected together and to the lamp casing 1 and the support 9 by double ball-and-socket joints 6. As shown the ends of the tubes are shaped to accommodate the balls ; in a modification the balls are spring- pressed against sleeves screwed on the tube ends. |
