1924 hatte man unter anderem in Chicago die Möglichkeit, sein Auto für 25 Cent in einer Auto Wash Bowl reinigen zu können. Quasi der Vorläufer der späteren Waschanlage.
The 24-meter-wide, ribbed concrete bowl was approximately 16 inch at its deepest point. Customers paid 25 cents to a clerk who tied a protective rubber cover over the radiator. The cars entered the bowl via a ramp and then drove in circles in the basin at a speed of approximately 10 mph per hour. The ridges in the concrete would vibrate the car and the water, creating a sloshing motion that helped wash all the mud off the chassis and wheels. The process took about 5 minutes. After leaving the bowl, customers could opt for a complete wash. In one of the bays (similar to a wash box) the rest of the car was cleaned. On a busy Saturday, about 75 cars per hour went through the wash basin.
(via Messy Nessy)
