A contrivance for a self-reversing motion.
The bevel-gear between the gears, B
and C, is the driver. The gears, B and C,
run loose upon the shaft, consequently motion
is only communicated when one or other
of them is engaged with the clutch-box, D,
which slides on a feather on the shaft and is
shown in gear with C. The wheel, E, at the
right, is driven by bevel-gearing from the
shaft on which the gears, B, C, and clutch
are placed, and is about to strike the bell-crank,
G, and produce such a movement
thereof as will cause the connecting-rod to
carry the weighted lever, F, beyond a perpendicular
position, when the said lever will
fall over suddenly to the left, and carry the
clutch into gear with B, thereby reversing
the motion of the shaft, until the stud in the
wheel, E, coming round in the contrary direction,
brings the weighted lever back past
the perpendicular position, and thereby again
causes it to reverse the motion.