Water-Clock Feedback and Time-Reporting Mechanisms

Mechanized clepsydra subsystems that used feedback regulation, floats, toothed elements, or time-reporting displays to convert regulated water flow into visible or audible clock motion.

Core metadata

Prerequisites

Dependents

Fields

Field lanes

Node sources

Prerequisite edge evidence

Edge/source evidence summary:

Prerequisite Type Confidence Evidence level Note Sources
Ctesibius-Style Regulated Water Clocks (water_clocks_advanced_clepsydra) required 84% review Water-powered mechanical clock mechanisms build on regulated clepsydra flow and feedback systems before adding time-reporting or display machinery.
Hellenistic Toothed Gears (gears_simple_classical) enabling 72% textbook Vitruvius' account of Ctesibius-style clocks describes toothed bars and drums for moving displays and automata; gears are an enabling mechanism for those versions, not for every water clock.
  • Water Clocks (MacTutor History of Mathematics Archive, 2026, textbook) • Supports: node, maturity, edge
Early Astronomical Observation (early_astronomy_observation) common_dependency 58% review Astronomical timekeeping was one important use case for advanced clepsydrae, but it is contextual domain demand rather than a hard mechanical prerequisite.

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