PURPOSE: To prevent the high frequency noise from flowing into an electric lamp line from various devices by providing a choke coil, a capacitor and a short circuit conductor with an mutual crossing between the electric lamp line of a noise eliminating filter and a side to be connected to a load and setting those connection terminals with a space secured between them.
CONSTITUTION: Connection terminals 6 and 7 for electric lamp lines are set apart from terminals 8 and 9 for insertion of plug sockets at the load side. Then a choke coil 1 having a high impedance to a signal frequency and a choke coil 2 which functions when a load device has a short circuit are set in series between terminals 7 and 9. Then a capacitor 3 is set in parallel to the coil 2 so as to obtain a resonance frequency at a carrier frequency band. While capacitors 4 and 5 having low impedances to the signal frequency are set between both power supply and load sides of the coil 2 and terminals 6 and 8 respectively. These said parts and wirings are stored into a box 10 with no mutual crossing among them.
WATANABE SUSUMU
YOKOSE YOSHIKAZU
