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Snap Action, Limit Switches

Snap action, limit switches are often used for mechanical control systems and have been widely used in robotics, automation and machine tools since the early 1900s. This type of switch uses physical pressure as an actuating mechanism and responds when the pressure exceeds a certain pre-set threshold. When actuated, the snap action switch will snap from one state to another, usually from open to closed or from off to on.

Typically, a snap action switch consists of a movable actuator, which is the part that gets actuated or triggered when the pressure exceeds a certain point, and a switch body, which houses all the necessary components. Inside the switch body, there is a small amount of spring-loaded contact faces, as well as a mechanism to hold the contact faces together. Depending on the type of switch, the contact faces can either be open or closed.

When the actuating mechanism of the snap action switch is triggered, usually by physical pressure, it causes the contact faces to snap from one state to the other. This action is known as "snap action" because it happens in a very short period of time, and is usually instantaneous.

Snap action, limit switches are primarily used to allow a mechanical device to detect when it has been triggered, and can be useful in a variety of applications. For example, they can be used to detect the presence of a door or window being opened or closed, to monitor the movement of a mechanical device, or to act as a safety switch in machines. They can also be used to provide feedback to a control system, allowing it to adjust the speed or operation of a machine.

Most snap action, limit switches are operated with electrical current or a magnet, although some types may use air pressure or mechanical force. The current or magnet is used to actuate the switch and cause it to snap from one state to the other. This type of switch is usually very reliable and is designed to withstand a wide range of environmental conditions.

The most common type of snap action, limit switch is the single pole double throw switch. This type of switch is designed to open and close when it is triggered, thereby controlling the flow of electricity. It is typically used in industrial applications, but can also be found in home appliances, such as refrigerators and washing machines.

Another type of snap action switch is the two-pole double throw switch. This type of switch is often used to control the flow of electricity in two directions and is typically used in applications such as machines, circuit boards and computers. The two-pole switch has two sets of contacts that must be manually pressed together in order to actuate the switch.

Snap action, limit switches are essential components of mechanical control systems and are used in a variety of different applications. Their fast and reliable operation, combined with their robust design, makes them ideal for a variety of different industrial and commercial applications.

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