| 摘要 |
A rolling ball drives mutually orthogonal rollers (20a) to produce proportional signals through coding wheels (11). The signals are sent to the associated computer through a radio transmitter (13) and power is supplied by a microgenerator (15) which is driven by an eccentrically mounted weight (17) through a gear train (16) which provides a unidirectional output irrespective of the input sense. |
