by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock

Full Title

Apparatus which can be set and started to measure-off predetermined or adjustably-fixed time intervals without driving mechanisms, e.g. egg timers > by movement or acceleration due to gravity > by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock

Classification Context

Section:

PHYSICS

Class:

HOROLOGY

Subclass:

TIME-INTERVAL MEASURING

Related Keywords