Early firsts In Laundry appliances In The US
Several early clothes dryers had variable automatic dryness controls instead of timers but most dryers just used a timer you set for running time.
The automatic water level control on 1961 LKM washers just filled to the low level [ about 1/2 a tub ] and then started agitating, if the load was heavy it caused the tub assembly to start swinging a little and would hit a micro-switch and every time it hit it would add a little more water till it either stopped hitting the switch or filled to the maximum 18 gallon level at which point it stopped adding water.
Reply # 23, Hi Sean, if you had spent the extra $15 dollars on a 1963 Mark 12 instead of getting the cheaper Imperial dryer you would have had real auto dry, LOL.
John L.