My take on the
autorinse cycle. Al your suggestion sound a good solution, but a bit complicated for such a basic machine, I humbly suggest, now if Parnall ever made a twin tub, I think you'd be onto something.
I'm going to suggest the rinse/spin cycle timer is along the lines of a basic clockwork tumble dryer timer, so the motor would be the motor and the heater would be the electric water valve. So replace the 120mins timer with a 12min agitator timer, both cheap off the shelf products, but combine the dryer switching with the washer clockwork timer, ok so maybe actual timings vary but you get the idea.
So transfer the wash into the spinner, hose over wash tub, turn timer to suds, spins for a minute or so and switches off.
Drain hose over the sink and cold tap would be on from when the machine was set up. Turn the timer to full cycle to give the maximum rinse, here I suspect you just get a longer spray rinse until the timer cycles through to spin dry when the water stops and the spinning continues until the timer return to the start or off position.
I would love to be proved wrong and there to be more to it, like a series of saturations and spins, but as Kieth has said, things were made to be gimmicky back then. Just look at how they turned a 4min timer into a variable fabric control, so adding lables like full cycle and suds etc made a simple spin timer
into so much more.
And yes, I agree again keith, just using a hose may well have been more effective, though with the inverted cone shape of the centrmatic spin dryer, with most holes around the base, it is a good spin drum for sprayrinsing.
Can someone find one so we can be sure lol
Mathew