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Solar clock displaying the hour by the projection of the shadow of the sun, even on cloudy days, day and night
Solar clock displaying the hour by the projection of the shadow of the sun, even on cloudy days, day and night
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机译:即使在阴天,白天和黑夜,太阳钟也可以通过太阳阴影的投影来显示小时
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摘要
A screen (1) marked in hours (2) may be rotated by 30 deg about a vertical axis and receives a shadow (4) from a gnomon (3). The gnomon is suspended by four upper strings (5-8) and four lower strings (9-12). The upper strings are actuated by motors on a pivoted platform (17) fixed to a sliding beam (18) and the lower strings by motors on a sliding trolley (20,21). All the motors are controlled by a sensor of sun direction
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