2 steel springs (in our application), when bent, serve 2 main functions: 1) They create
a resistance to the ‘downward’ pull that the coils exert on the armature bar, by
pulling the armature bar in the opposite ‘upward’ direction (rear spring) & 2) Control
the speed (front spring) and force the armature assembly will bounce back (after making
contact with the contact screw) to the coil (with the aid of the coil’s magnetic pull).
Springs usually are used in pairs; a rear spring and a front spring. Though a “one piece”
spring may be used (p. 51), the spring “pair” combination produces greater variability
and versatility in the intended uses of the machine and each (spring) has it’s own job to
do. Machines usually use a pair of springs, a front and a rear spring. These springs are
usually made from “close grain high carbon spring steel” or “strapping steel”. An excellent
