Obvious once you point it out - one other detail. The things that appear
to be a secondary winding are actually voltage gradient control rings
used to equalize the voltage across different segments of the column.
Probably have some highly resistive material between each one. This must
be a device designed to power some sort of accelerator - wonder what
type?
"You can see what appears to be a wide belt (perhaps 10" wide?) on a
pulley on the end of the large motor at the base of this device.
Am i getting too far OT?
Sure looks like a primary, at base...
Years back, since removed (a pox on them 8)>>)
Smithsonian Inst in DC had a hugish 'real lab' vdG.
Accompanying text mentioned that van de Graaff developed
his design as 'an easier to control' alternative to
Tesla type HV supplies. As to which machine: pix have
dates, dunno who, but there must be life issues/microfilmed
somewhere.
best
dwp
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