Power windows are ones that use an electric system in order to raise of lower windows on a car. They have entirely replaced manual crank handle mechanisms on modern cars.
Origins:
Before electric power windows, the Chrysler Corporation installed windows that could be operated without human effort in the 1930s. These systems were vacuum operated and produced by for Plymouth convertibles.
The first cars to be installed with power windows were Packard 180s in 1941. They used a hydro-electric system to operate.
In the same year, the Ford motor company installed their first power windows in the limousine and seven passenger sedan versions of the famous Lincoln Customs. At the time, their design must have felt like magic to drivers accustomed to crank handle systems.
Also, in 1941, Cadillacs were installed with power windows but only for the divider window between front and back. Here is where the typical scenes in Hollywood originate from; passengers in the back would raise the power window so that the driver could not hear what they were talking about. Obviously, at this time, it was only the rich and powerful that could afford such vehicles. In turn, such people found it very convenient that they could have private conversations in transit without the fear of an eavesdropping driver.
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