American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 115
nation plate and spider aekestee.—Another form of lightningarrester consists of a fine wire of some alloy, such as German silver, inserted in theline wire at the switch. This is generally placed as an auxiliary to the forms of*arresters previously described. This wire has a higli resistance as… … ARRESTER ON SWITCH-BOARD. This combination arrangement of fuse and ground plate, shown in Fig. 70, orModifications of it, is now almost invariably used in cable boxes and cablehouses, and on the cupolas of telegraph offices, and it is being extensively introducedon switch-boards. The wire used has…
Telegraph
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