| 摘要 |
The pair (17) is formed of two identical straight blades having on each side equivalent half-holes. The blades are shaped into capital S springs, and they are arranged in an inverted, upright position, facing each other and side to side, so that the half-holes communicate into full holes. Thereafter, the pair is linked for example at the top by means of a brush (7) and the bolts (21), thereby readily assembling the pair of springs (17). Finally, the bottom of the pair is attached by locking it to its base (12) by means of nuts (24) and screws (4). The pair of springs (17) has a same length all over, and this is due to its central attachments. It is used in electric trolleys or, after adjustment, in balance-inverters. |
