The 1950 Westinghouse laundromat had a weight scale incorporated into the door

 A very interesting appliance was born from the creative minds of the 1950s designers and engineers. I am talking about the 1950 Westingouse automated laundromat with weigh-to-save door. To wash the clothes first you have to put them on the door to measure the weight. Depending on that next you check the weigh-to-save scale and see the weighting result: small, medium, large. In the end you set the water saver according with the previous measurments.

The washed then fills itself  with water, washes, triple rinses, damp dries the clothes, then cleans itself and shuts off automatically.