Page 116 - My FlipBook

hand to any point on the scale (Fig. 120B) the furnace will instantlv
stop heating when the "recording hand" (Fig. 120A) comes in contact
with it. If the operator does not wish to use this "automatic feature" the
furnace may be operated as an ordinary pyrometer furnace by moving
the "secondary hand" (Fig. 119B) to some point near No. 10 on the
scale. The current may be c"t out by pressing down on the small button

\

Fig. 126.

switch (Fig. 120C), which is located on the right-hand corner of the
marble base on which the furnace is mounted.
The furnace is started by moving the main lever (Fig. 119C) to
the left until it touches stop "D," at which point it is released and auto-
matically moves over to the second contact. This is the lowest heat con-
tact that the furnace is capable of giving. A notable feature is the
fact that the furnace can not be accidentally started while the lever
is restmg on the higher heat contacts. The operator is always required
to move the lever to the extreme left side or until it touches the stop "D."

112