What is the function of a push button switch?

The function of a push button switch is to allow current flow when it is pressed. This type of switch operates as a momentary contact device, meaning that it completes the circuit and allows electricity to flow only while the button is being pressed. When the button is released, the switch returns to its default position, typically breaking the circuit and stopping the flow of current.

This temporary control is useful in various applications, such as starting machines or initiating specific functions in an electrical system without making a permanent change to the circuit state. It underscores the importance of momentary switches in control panels and devices where a simple press is needed to trigger an action without necessitating ongoing power.