FIGURE 28. Circuits of Local Battery
plete talking circuit, which includes the transmitters, the receivers, the batteries of the two telephones, and the connecting
telephone line. Thus, voice currents generated by a person speaking into the transmitter of one telephone have a complete
electrical path through the telephone line to the receiver of the other telephone.
(2) The signaling circuit of the telephone set provides an electrical path through the signaling device
for the signaling current. Its prime component is the ringer. In the local-battery telephone set it also includes
a hand generator. In B, the heavy lines show the complete signaling circuit between two telephones. It includes the
generator of telephone set A, the ringer of telephone set B, and the connecting telephone line. Rotation of the crank of the