Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 105
he arc were blown out by apuff of wind. Another form of this arrester has two flat plates so sur-rounded by the magnetism that the blow out effect isstronger, and it is relied on, there being no horns to help.Both of these are used on direct current circuits. Question 19. Describe an arrester for… … Fig. 37. Wurtz Non-arcing Lightning Arrester.Alternating Current. Used with brass with a large percentage of zinc, and very little cop-per, in it. They are knurled or checkered so that the sur-face is covered with little points. These cylinders are held in insulating strips so as to beabout 1-64 of…
Electricity
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