Hellenistic Toothed Gears
Hellenistic toothed wheels and gear trains used to transmit rotary motion, change speed ratios, and drive clocks, automata, water-lifting machinery, and astronomical instruments.
Core metadata
- ID: gears_simple_classical
- Era: Classical
- First known date: -300 (century)
- Region: Hellenistic Alexandria and wider Greek Mediterranean
- Review status: source_checked
- Maturity: N/A
Prerequisites
Dependents
- Clockwork Mechanisms (clockwork_mechanisms)
- Geared Calculating Devices (geared_calculating_devices)
- Water-Clock Feedback and Time-Reporting Mechanisms (mechanical_clocks_water_escapements)
- Mechanical Clocks (mechanical_clocks)
Fields
Field lanes
- Mechanical Engineering: Foundations & Measurement
Node sources
- Gearing in the Ancient World (Endeavour / Elsevier, 1993, review) • Supports: node, maturity, edge
- A Model of the Cosmos in the ancient Greek Antikythera Mechanism (Scientific Reports, 2021, primary_paper) • Supports: node, maturity, edge
Prerequisite edge evidence
Edge/source evidence summary:
- Prerequisite edges: 2
- Average edge confidence: 78%
- Prerequisite sources: 2
- primary_source: 1
- review: 1
| Prerequisite | Type | Confidence | Evidence level | Note | Sources |
|---|---|---|---|---|---|
| Wheel and Axle (wheel_and_axle) | required | 82% | review | The scoped technology is toothed wheels on rotating shafts; wheel-and-axle construction is the mechanical substrate for gear trains. |
|
| Mathematics (mathematics) | enabling | 74% | primary_source | Gear trains encode ratios between rotations; the Antikythera evidence shows mathematical cycle modeling expressed through gear counts and dial scales. |
|
This page is generated from canonical era JSON and is indexable by URL.