Patent for a new and improved gear-shifting mechanism for harvesters. This design "has reference more especially to a gear-shifting mechanism for a reciprocating conveyer in which a gear is engaged and automatically disengaged as the conveyer nears the end of its stubbleward movement" (lines 10-15). It consists, "with a bar provided with a guide having a slot and a depression in said slot, an antifriction roller on said guide, a block or track having a recess, a movable bearing pivoted to the harvester-frame with one end and extending with its other end to the guide" (lines 106-112).