| 摘要 |
383,143. Springs. KADEN, K., M³hlbach, Bezirk, Chemnitz, Germany. March 11, 1932, No. 7300. Convention date, April 16, 1931. [Class 108 (iii).] Flat springs made of a serpentine of wire are passed through a roller mill to give the springs a rounded shape, as in Fig. 2, and render them more rigid in use. Double or single serpentine springs may be treated. |
