Power supply transformer for telephones, has bobbin which is divided into winding frames by flange such that sufficient distance and insulation is provided between input and output windings

摘要

A bobbin (1) is divided into winding frames by flange (5), so that sufficient distance and insulation is provided between windings. The winding wire (2) on winding frame at input side is connected to main power supply. The winding frames at output side comprises secondary side windings (3,4) used for charging and for telephone circuit independently.