WatchesAtlas / Watch knowledge
The Watch Encyclopedia
Understand the details that make a watch.
10 terms
Clear filtersRatchet wheel
A winding wheel connected to the barrel arbor and held against reverse rotation by a click.
Movements & mechanismsRattrapante clamp
A mechanism that temporarily arrests the split-seconds hand while the primary chronograph hand continues.
Movements & mechanismsRattrapante isolator
A component intended to reduce interference between a stopped split-seconds hand and the running chronograph mechanism.
Movements & mechanismsRegulator index
A rate adjustment device that changes the effective working length of a balance spring.
Movements & mechanismsRegulator pins
Pins controlling the effective working section of a hairspring in an indexed regulating system.
Movements & mechanismsRemontoire
A small secondary energy store periodically replenished by the main train to help stabilise delivered force.
Movements & mechanismsRemontoire period
The interval between successive replenishments of a remontoire's secondary energy store.
Movements & mechanismsReset hammer
A chronograph component that presses on reset cams to return counters to their zero positions.
Movements & mechanismsRoller table
A component mounted on the balance staff that carries parts involved in escapement interaction.
Movements & mechanismsRotor
The rotating mass that converts wrist movement into winding energy in an automatic watch.