Egg timer clock using sand

摘要

Minutes can be indicated in one vessel (2) and in a second vessel seconds can be indicated. The hours can be indicated (5) in a third vessel and take place separately. The hours can be indicated in a first vessel and the seconds can be indicated in a second vessel. An indication of the minutes (6, Fig.4) can be indicated separately. Similarly, a seconds indication can be separately carried out or dispensed with.