Love the PDF file!
This is a very cool machine in more ways than one!
I am amazed from the readings that you posted that it is a 8 pound machine. It would seem smaller.
Can you when you find out tell us / me what actually happens in the drive that makes the wash basket wobble at the frequency that is is going at? I find this so amazing because the drive is actually so simple, subtract from the spin clutch.
I love the wash, and I don't think that another drop of water was / is needed to be added back into it the wash basket. I think that once the clothes became wet, (soaked) and the soil became loose, the "sonic pulses" that actually scrubbed the clothes against the "washboard" took over getting the soil out and over to the outer tub. The soil was to go over the top with the wash / rinse water that was splashing into the outer tub. Kind of like the "overflow rinse" that goes on in other brands. The water for the two rinses would not only get out the soap, but also the rest of the dirt through the same process. I can see it being very productive. It was very well thought out if you ask me. This is what is going on in the washers that are "HE" today that uses even less water. Everyone knows the brands so I won't name them here, and I have had great experiences with several brands.
I bet you are having a blast with your new toy. I am amazed by it.
I am also amazed from reading your Apex PDF file of how inventive this corporation was. I took into context that this was 1953 for their products. Apex was very impressive to me.
I would love to try there clothes dryers. They seemed very forward for the time.
Brent