[Bubier], Edward Trevert, 1858- [from old catalog] · Lynn, Mass., Bubier pub. co. · leaf 113
arc grows too longthe lessening attraction on the clutch permits thecarbon-holder to advance. Fig. 3 shows the Brush Electric Co.s arc lamp.This is a double-carbon lamp and when one carbonhas burned cut the current is shifted automaticallyto the other, thus making the life of the lamp twiceas long.…
Electricity
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