Escapement
Spring detent escapement
How it works
A spring-mounted detent locks the escape wheel; the balance unlocks it and receives impulse directly, once per oscillation.
Why it was invented
Requires no oil on the impulse faces; the standard for marine chronometers.
- Invented
- late 18th century
- Credited to
- Pierre Le Roy; refined by John Arnold and Thomas Earnshaw
- Related
- Detached lever escapement