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 1454
s arc lamp the shunt coil is used to regulate thevoltage over the arc. With constant potential arc lampsthis shunt coil is not needed^, owing to the fact that thevoltage over the lamp is practically constant. Fig. 673shows a diagram of an arc lamp for use on constant poten-tial circuits. The upper… … ■ Fig. 672 and through the resistance coil E to the other terminal ofthe lamp. The action of the lamp is as follows: Currentpassing over the solenoids M M is regulated by the resist-ance across the arc. This current produces an electromag-netic pull on the iron core and floats, magnetically;, the…
