DIFF Subgroup
G04F 1/06 by flowing-away of a prefixed quantity of fine-granular or liquid materials, e.g. sand-glass, water-clock
Introduced: September 1968
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
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
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