Automatic telephony; a comprehensive treatise on automatic and semi-automatic systems (1921)
Smith, Arthur Bessey, b. 1875, Campbell, Wilson Lee · New York : McGraw-Hill · leaf 215
pieceit closes circuit through the outsidewinding of the meter from negativebattery to the private normal, which isof course connected to earth. At thesame time, however, circuit has beenclosed through the inside winding ofthe meter, which is connected in seriesin the negative side of the trunk to… … Fig. 175.- -Lineswitch unit with metersat top. stage of the connection these that the meter armature is not attracted. sponds, however, and his connector reverses the direction of the current flow in the calling partys loop then the inside meter winding assists the outside winding and the meter…
Telephone
Internet Archive · California Digital Library · Public Domain Mark 1.0. Free to use for anything.
