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The Encyclopedia of Horology

Component record · Train

Hour Recorder Wheel

Partially verified

Slow-moving wheel

What it does

Counts elapsed hours

How it works

Evolution

Driven by mainspring barrel usually

Known variations

    Identification for collectors

      Common failure modes

      • Drag

      Diagram

      barrelcentre wheelthird wheelfourth wheelescape wheel
      Schematic: the going train. An outline schematic drawn to show the arrangement of the parts discussed here. It is not a dimensioned working drawing and does not depict a particular maker's calibre.

      Sources & references

      1. de Carle, D., Practical Watch Repairing
      2. de Carle, D., Watch and Clock Encyclopedia
      3. Daniels, G., Watchmaking

      Where sources disagree, the disagreement is stated rather than resolved silently.