Grape harvesting machine

Claim 1

A MACHINE FOR HARVESTING CLUSTERS OF FRUIT FROM VINEYARDS WHERE ROWS OF VINES HAVE BEEN TRAINED ON A GENERALLY HORIZONTAL TRELLIS WIRE EXTENDING LONGITUDINALLY OF EACH ROW IN SUCH A MANNER THAT A CURTAIN OF FRUIT BEARING CANES HANG FROM SAID LONGITUDINAL TRELLIS WIRE, COMPRISING A FRAME MOVABLE THROUGH THE VINEYARD ALONGSIDE EACH ROW OF VINES, MEANS HAVING VINE ENGAGING MEMBERS ARRANGED BELOW THE LEVEL OF SAID LONGITUDINAL TRELLIS WIRE FOR PICKING THE FRUIT FROM SAID CURTAIN OF FRUIT BEARING CANES, POWER ACTUATED MEANS ASSOCIATED WITH SAID FRAME FOR RAISING AND LOWERING SAID PICKING MEANS IN A VERTICAL DIRECTION WITH REFERENCE TO THE GROUND, A SENSING ELEMENT MOUNTED ON SAID FRAME FOR VERTICAL MOVEMENT AND POSITIONED TO ENGAGE AND RIDE ALONG THE TOP OF SAID LONGITUDINAL TRELLIS WIRE AS THE HARVESTING MACHINE PROGRESSES ALONG EACH ROW OF AND MEANS RESPONSIVE TO THE ELEVATION FROM THE GROUND OF SAID SENSING ELEMENT AND CONTROLLING SAID POWER ACTUATED RAISING AND LOWERING MEANS TO RAISE AND LOWER SAID PICKING MECHANISM CORRESPONDING TO THE VERTICAL UNDULATIONS OF SAID LONGITUDINAL TRELLIS WIRE.