The spokes are inserted through the center of a sliding block and the sliding block slides along the spokes radially. The secondaryshaft and the sliding block are connected by a chain bar.
滑块由轮辐从中间穿入并沿轮辐径向滑动，副轴和滑块之间用链杆连接。
2
Tesla's invention is, in essence, a rotating transformer. Its primary windings reside in a stationary steel casing (the stator) and and secondary conductors are attached to an inner shaft (the rotor).
Think of it as a rotating transformer, with the primary windings residing in a stationary casing (stator) and the secondary conductors attached to an inner shaft (rotor).