Quote:
Originally Posted by Varley
Granite, never heard of that as an insulator nor of Carbon filament synchrometer (synchroscope?) - not French by any chance?
(Don't worry about JJ's teasing. I'll think of a riddle for tomorrow if E-S doesn't beat me to it)
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Synchrometer had a dial and two lamps. When the pointer on the dial was vertical and both lamps out, it was time to close the breaker. If the dial wasn't visible, (3 machines in the plant) the lamps were. The owner had fitted two very old carbon filament lamps.
And Yes, the panel was/is granite slabs. It's located in Wadhams, New York state.
I'll see if I can find some pics.
Here - Matthew William Foley, granite panels.
https://www.adirondackexplorer.org/s...es-tom-woodman The synchroscope is directly above his head, lamps not visible.