| 摘要 |
In a clock mechanism of the ''Congreve'' type, in which escapement is controlled by a ball (24) rolling down a tiltable track (22) the ball striking a lever (50) to release the escapement (34) at each end of the track and to tilt the track in the opposite direction, the ball is given impetus in the opposite direction when the track is released by spring means (56) as illustrated and/or by the track being inclined upwards slightly at each end. |
