Power windows or electric windows are automobile windows which can be raised and lowered by pressing a button or switch, as opposed to using a crank handle. Power windows are usually inoperable when the car is not running. This is primarily a security feature.

It would be a simple thing to allow electric power windows to be operable when the ignition is turned off, however it would also make the car much easier to steal. Some systems offer the compromise of leaving power applied to the windows until a passenger door is opened at which time the window power is removed.

Power windows have an electronic motor attached to a worm gear, which is attached to several other gears, to create torque to lift the window. A long arm is attached to a bar at the bottom of the window. One end of the arm slides into a groove as the window rises up.

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