M o s t of the switches have one or two contact points and
circuits because of their structure. A n additional mecha- /
nism is required to operate it at a high speed because it
has no such mechanism as that of snap switch.
Photo 7 Plate Spring Switches
g) Microswitch
This is cased in a small box, is operated at a high speed
by a pressure to a spring and allows a large current. This
requires an additional mechanism to be operated because
of its difficulty in m a n u a l operation. This is used for
switching power and selecting signal channels. Fig. 8 shows
the structure of a typical microswitch.
This has one or two contacts and mostly one or two cir
cuits. Like the plate spring switch the n u m b e r of circuits
is limited. The microswitch which has an actuator has both
features of plate-spring switch and snap switch.
Springs
Terminals
Actuator
Fig. 8 Microswitch
Photo 8 Microswitches
8
Pin
Case
