MACHINE FOR MAKING BLUE MASS. 
7 
/. The connecting rod communicating the motion from the crank to 
the guide plate and piston. 
g. The large cog-wheel attached to the crank 19 inches in diameter, 
with an arm to which the handle is fastened. 
h. The fly-wheel — to regulate the motion of the machine, to which 
a handle is attached. This wheel is placed on the same axle 
w r ith a small cog-wheel, 
i. Which communicates with the large cog. 
k. Is a revolving plate attached to the guide-plate, the circumference 
of which is armed with teeth. The brass cap of the connecting rod 
which connects it with the guiding plate, is furnished with project ■ 
ingarms, which press alternately against two palls catching in the 
teeth of the revolving plate, which palls are kept in position by 
two semi-circular springs attached to the guide-plate on either 
side. The motion of the connecting rod back and forth occa- 
sioned by the revolving crank, causes the arms of the cap to 
press against the palls, and thus force around the revolving 
plate. The piston is screwed into this from beneath, and con- 
sequently revolves with it six revolutions of the crank, affecting 
one of the piston. (The engraving is defective at this point, and 
does not convey a correct idea.) 
/. Is an iron spade curved to suit the cylinder, and used for removing 
the mass. 
m. The two-bladed knife, the outer sides being bevelled ; the inner 
flat- the blades being about 3-16ths of an inch thick at the 
centre. 
n. Is the one-bladed piston. This blade is constructed like those 
just described, except that the ends of the knife are turned in 
opposite directions about 3-8ths of an inch. 
o. Is a tinned iron funnel-shaped rim, which fits closely on the top 
of the cylinder, and is intended to prevent waste by the lifting 
effect of the knives at the beginning of the process. 
p. Is a movable scraper attached to the wooden fiame-w r ork, and 
pressing slightly against the piston rod or knife-handle, and 
which is intended to keep it free from the mass. 
When the full charge of ingredients, thirty pounds, is introduced into 
the cylinder, the handle is attached to one of the spokes of the fly- 
wheel, and the power then applied till the materials are mixed to a 
certain degree. The quantity is then reduced to one-fourth, and the 
power applied to the handle or the large cog-wheel. It is necessary 
that the machine be fastened firmly to the floor. 
