| 摘要 |
The magnetised data carrier (2) records surges in the associated conductor (1) w.r.t. which it is rotated continuously or in steps throughout the time of recording. The disc is held with its surface in a plane contg. the axis of the conductor. Each region in which data are stored is defined by a small slot (5) in the screen around the disc. Power for the rotary drive is supplied from a solar cell in a protective film, whose removal activates the appts. |
