Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1456
ss the crater isusually from 45 to 50 volts, while in the inclosed arc lampthe potential across the crater is from 68 to 75 volts. Thisis due to the increased resistance through the crater, because Arc Lamps 1421 of the peculiar nature of the gases emitted from the craterburning in a condition with… … Fig, 673 arc, see E. Fig. 672. This resistance coil assists to reducethe pressure from 110 volts to the pressure required by thearc or crater. If, for instance, the electromotive force acrossthe wires supplying current to a low tension arc lamp is110 volts, and the pressure required to maintain the…
