Figure 2 is
a view of the program disk, motor, switch and trip mechanism.
The large circular area marked with an A (on the far left side)
is the program disk. It is marked with the numerals 1 to 12 to
look much like a clock dial. The switch mechanism is in the
lower central area of the drawing and is marked with a B. The
motor mechanism is marked with a C (on the far right side).