thoughts Mike
I agree fascinating to see something new yet familia. I've had a good look at the hoovermatic videos and photos with the wringer stop. The first observation is that you never see the washtub and spinner running at the same time, could the motor bare more resemblance to the power wringer single tubs, where the motor runs one way for the pulsator and the other for the wringer, that may explain the wringer switches of the first machine, maybe timed for wash direction and no lid switch on the spinner so spin stop instead of wringer stop? The motor could be under the wash tub as we are used to, then and a real speculation and do I dare suggest, a keymatic style belt of the back of the wash motor, turning 90 degrees over 2 idler pulleys then round the spinner drive pulley and pump. The motor would have one direction pulleys, so only one end was engaged when the motor ran in either direction, hence wash or spin.
The mark 2 version obviously has a spiner lid switch and brake, so wouldn't need the stop button, and rotary selector selects wash or spin and works the ocv style pump valve behind the scenes, the spin pump always running during spining, and either a second pump or a valve to empty the tub, as on the singletub machines where you empty the tub on wringer mode, rather than with the pulsator spraying the ceiling.
Well these are all just thoughts, would be great to see the back of, and also to have a go with a spinner with the stop button instead of a lid switch, how often do you think we'd be standing there waiting for the spinner to stop, before we remembered the stop button lol.
Thanks again for the thread and the little brain teaser, any one any other suggestions, would love to read what you think.
Mathew