Folding
Arm Type
The lever, A,
is represented in the act of falling from the periphery of the wheel
into a right line. The lever is composed of a series of flat rods,
connected by ruler joints, which said ruler joints are provided with a
stop or joggle, to prevent their collapsing at any time more than will
bring anyone of the rods which compose the levers at a right angle with
the rod next to it.
This lever is attached to the periphery
of the
wheel by the hinge joint, B, provided with the shoulder, to prevent
its falling into any other than a right line from the center of the
circumference of the wheel. The levers are furnished at their outer
extremities with a bucket or receiver, the bottom of which is
sufficiently broad to retain the ball C. The balls remain in the
buckets till the buckets come into the position of the lever, D, when
they are expected to roll out of the buckets on to the inclined plane,
and by their own gravity roll to the other end of the inclined plane,
ready to be again taken into the buckets. Patented in 1821.
(Subsection 918, from
p.367)
From: Gardner D. Hiscox, M.E., Mechanical Appliances and Novelties of Construction (1927), Norman W. Henley Publ. Co.
In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
