by movement or acceleration due to gravity

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

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