Grasshopper escapement As a result, on the 18th of April 2015, the Guinness World Records organisation presented a World Record certificate to Martin Burgess for having made the most accurate purely mechanical clock working in free air. The clock remains at the ROG; in 2017 it was moved to the gallery containing the Harrison marine timekeepers where its performance continues to be monitored. Grasshopper escapement The grasshopper escapement is a low-friction escapement for pendulum clocks invented by British clockmaker John Harrison around 1722. An escapement, part of every mechanical clock, is the mechanism that gives the clock's pendulum periodic pushes to keep
Escapement to a point close to its unstable state, and is released with a snap each swing of the balance wheel to give the wheel an impulse, after which it is cocked again by the wheeltrain. The advantage claimed is that since the blade imparts the same amount of energy to the wheel each release, the balance wheel is isolated from variations in impulse force due to the wheeltrain and mainspring which cause inaccuracies in conventional escapements. Parmigiani Fleurier with its Genequand escapement and Ulysse Nardin with its Ulysse Anchor escapement have taken advantage of the properties of silicon flat springs.