Assertion: steam engine's piston | /r/CapableOf | pull one end of the walking beam
Facets:
value: downwards during the power stroke
type: MANNER
value: in previous engines
type: TEMPORAL
Source sentences:
text: In previous engines built by Newcomen and Watt, the piston pulled one end of the walking beam downwards during the power stroke using a chain, and the weight of the pump pulled the other end of the beam downwards during the recovery stroke using a second chain, the alternating forces producing the rocking motion of the beam.