American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 114
In other forms of lightningarresters, the line strips, as indicated in Fig. 67,are placed upon a ground strip with only thin layers of parrafin paper interven-ing. In this form the lightning discharge, in passing to the earth, ruptures the par-rafin paper. The manner in which the plates are… … To In^^nurienZs In many way-office and other switches, a disc form of arrester ■ is used, onedisc, connected to the earth, being placed over two strips. The discs r> d, Fig. d^, arescrewed on to the ground strip p (which runs horizontally the length of theswitch-board, on the back of it) but do…
Telegraph
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