Apparatus for measuring unknown time intervals by non-electric means

Classification Context

Section:

PHYSICS

Class:

HOROLOGY

Subclass:

TIME-INTERVAL MEASURING

Child Classifications

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• G04F 7/02 by measuring the distance of fall or the final velocity of a falling body
• G04F 7/04 using a mechanical oscillator
• G04F 7/1 Means used apart from the time-piece for starting or stopping same