This style of Automatic Engines combines simplicity, compactness,
direct action, lightness of moving parts, automatic lubrication, and
perfect regulation.
[Illustration: J. I. Case Automatic Pedestal Engine.]
It is made in three main varieties: The Pedestal Engine, the Bracket
Engine, and the Hanger Engine. The illustration represents the
Pedestal type, the upright frame of which is cast in one piece, and
encloses and protects the principal moving parts, its lower part being
a reservoir for oil, into which the crank-pin dips at every revolution,
affording a simple and efficient means of lubrication.
The piston is connected directly with the crank shaft, thus doing
away with the cross-head, wrist-pin and guides. The piston being thus
connected at one end to the crank-pin, it travels back and forth at its
other extremity through the bore of the cylinder. The latter by reason
of its shape is free to turn in its casing, and is therefore rocked by
the vibrating piston rod through an arc sufficient to open and close
the steam and exhaust ports on its face.
The cut-off valve is of the plug type, and receives its motion from the
shaft cut-off governor, attached to the balance wheel.
The center crank shaft runs in two large bearings which are bolted
securely to the side of the frame. Access to the inside of the frame
can be had by taking off the plates from either side.
The J. I. Case High Speed Engines range in size from 2½ to 25 horse
power, the speed of which ranges from 900 down to 550 revolutions per
minute, and can be used in any capacity.