To increase power in single pole induction by overlapping a plurality of copper discs of an identical size, inserting them into a central axis, wrapping a copper plate around the outer periphery of the copper discs so as to move flexibly on the copper plate.

A plurality of copper discs 1 in unipolar induction are arranged cylindrically, a copper plate 2 is wrapped around the outer periphery thereof, and the central shaft 3 of the copper disc 1 is disposed horizontally. When a collecting needle 4 is put on the copper plate 2 of the outer periphery, and the copper disc 1 is rotated, the collecting needle 4 is capable of moving on the copper plate 2 flexibly, so that electrons flow toward the outer periphery of the copper disc 1 from the central shaft 3, thereby increasing power several times by the number of the copper discs 1. The collecting needle 4 mounted on the copper plate 2 is designed to move on the copper plate 2 flexibly, thus it is possible to move on the center shaft 3 and copper plate 2 having the largest potential difference, thereby increasing power effectively.