Fuente: WIPO "rice" 732,968. Spring catches. RICE CARAVANS, Ltd. Nov. 11, 1952 [Nov. 12, 1951]. No. 26433/51. Class 44. [Also in Group XXXII] A ball and socket coupling, (see Group XXXII), is fastened by movement of a screw 13 rotated by an integral handle 15, the screw 13 being releasably locked in various positions by a spring tube 16 pinned thereto, which tube is provided with ribs 19 which engage flutings on the screw boss 14.