Teacher Courses
Yaser Ahmad
Instructor
![Yaser](/content/user/e446c97d-46a4-4508-a1fd-bbeaaa1bd0c8_204x204.jpg)
Age
42 year
Country
UNITED ARAB EMIRATES
Instructor Bio
The most common switch action is a hybrid of the cam
and snap actions. The pseudo-snap-action switch is a cam
action switch with a snap action actuator. This type of
switch has a number of attributes that make it an attractive
solution for many applications. The simplicity of the design
provides relatively low manufacturing costs, minimized
contact bounce, fast open/close cycle, and excellent tactile
feedback.
Figure 4-12 shows a pseudo-snap action switch mechanism.
Take notice that the contact and actuator design is very
similar to the cam action shown in Figure 4-10. The principal
difference is the actuator ball and spring, that are intended to
provide the snap action.
A specialized type of pseudo-snap action switch is the
drum switch. These switches are generally designed to provide
a forward-off-reverse function for low horsepower, three
phase motors. Figure 4-13 shows a typical commercial drum
switch.
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