S.S. Hersey View 2
As the hand-driven gear is rotated clockwise a small bevel gear rotates the
two larger bevel gears facing each other in opposite directions; however,
a modified two-toothed gear on the paring arm is meshed with only one of
them. After
the paring arm has traveled 180-degrees an incline on the small bevel gear
pushes the two-toothed gear across its axle so that it can mesh with the
gear traveling in the opposite direction. The result is a parer that automatically
switches gears!
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