Common battery sentence example
Though many types of manually operated switchboards have been brought into use, differing from each other in respect of circuit and working arrangements, yet each of them may be placed in one or other of three main classes according as the system of working is magneto, call-wire, or common battery.
There are still many magneto exchanges in existence, but when new exchanges are erected only the very smallest are equipped for magneto working, that system having succumbed to the common battery one in the case of all equipments of moderate and large dimensions.
One of the greatest advances made in the development of the art of telephony was the introduction of the " common battery relay system."
Threefundamental common battery transmissionsystemshavebeen devised and are shown in figs.Advertisement