e/Grasshopper escapement

Information
has gloss	eng: The grasshopper escapement is an unusual, low-friction escapement for pendulum clocks invented by British clockmaker John Harrison around 1722. An escapement, a part of every mechanical clock, is the mechanism that releases the clock's gears to move forward by a fixed amount at each swing of the pendulum.
lexicalization	eng: grasshopper escapement
instance of	(noun) mechanical device that regulates movement escapement

Media
media:img	Grasshopper-escapement-005.gif