by movement or acceleration due to gravity

Introduced: September 1968

Last revised: January 2006

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

Classification Context

Section:: PHYSICS
Class:: HOROLOGY
Subclass:: TIME-INTERVAL MEASURING

2 direct subcodes

Child Classifications

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G04F 1/06 by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock
G04F 1/08 by a body falling a prefixed distance in air or in a viscous material