Skip to content
The Encyclopedia of Horology

Component record · Regulation

Regulator Boot

Partially verified

Closing latch for pins

What it does

Prevents hairspring from jumping out of pins

How it works

Evolution

Found in high-grade movements

Known variations

    Identification for collectors

      Common failure modes

      • Loose latch

      Diagram

      top plate or bridgespillar platebalance and cockwheel train between the plates
      Schematic: plate and bridge layout. 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.