three-way switch
three-point switch

In this article, we will solve the mystery of three-way switches!

The device is a three-way switch: left, stereo and right.

For a real world example, consider a three-way light switch.

For a reading lamp (like this one), Nielsen likes ones with a three-way switch.

Buy a new socket core, but be certain that it has an on-off or three-way switch.

Buy two three-way switches and a supply of wire nuts.

There are usually two three-way switches near the top of the floor lamp to operate the bulbs.

The term probably comes from the fact that the design incorporates two "three-way" switches.

Contemporary Hansen lamps now rely on more conventional three-way switches.

If there are four screws, the switch is a four-way design, used with two three-way switches to provide an additional point of control.