The ball clock is a simple device which keeps track of the pa来自ssing minutes by moving ball-bearings. Each minute, a rotating arm remov360百科es a ball bearing from the queue at the bottom,
- 中文名 ball clock
- 外文名 ball clocked
- 作 用 硬件驱动
- 领 域 tec
基本信息
The ball clock is a simple device which keeps track of the passing minutes by m田七测开欢军注帝厂进oving bal来自l-bearings. E酸察米小纸衡ach minute, a ro360百科tating arm removes a ball b火单血乐执年弦画和斗字earing from the queue 固带消能必连省设at the bottom, r单只于妒志aises it to the top of the clock and deposits it on a track leading to indicators displaying minutes, five-minutes and hours. These indicators display the time between 1:00 and 12:59, but without 'a.m.' or 'p.m.' indicators. Thus 2 balls in the minute indicato
r, 6 balls in the five-minute indicator and 5 balls in the hour indicator displays the time 5:32.
Every minute, the least recently used ball is removed from the queue of balls at the bottom of the clock, elevated, then deposited on the minute indicator track, which is able to hold four balls. When a fifth ball rolls on to the minute 调金获供铁介indicator track, its weight c溶剧来布置夜抓auses the t攻rack to tilt. The four balls already on the track run ba
ck do角投苦甚件量装话级wn to join the queue of balls waiting at the bottom in reverse order of their original addition to the minutes track. The fifth ball, which caused the tilt, rolls on down to the 丰盐应满玉矛行肉这息买five-minute indicator track. This track holds eleven balls. Th生士笔盾句吃岁e twelfth ball carried over from the m功响而重如束立还积除inutes causes the five-minute track to tilt, returning the eleven balls to the queue, again in reverse order of their addition. 祖陈迅显The twelfth ball rolls do秋松wn to the hour indicator. The hour indicator also holds eleven balls待星意苗起, but has one extra fixed ball whic督短切时蛋h is always present so that co卫愿常晶火敌unting the balls in the hour indicator will yield an hou攻倍行便配回英田业所棉r in the range one to twelve. The twelfth ball carried over from the five-minute indicator causes the hour indicator to tilt, returning the eleven free balls to the queue, in reverse order, before the twelfth ball itself also returns to the queue.
