| 摘要 |
PROBLEM TO BE SOLVED: To provide a three way switch with an indicator light where the indicator light which indicates a position of the three way switch is not erroneously lit when the three way switch is ON, avoiding such condition as a user falsely recognize a trouble. SOLUTION: A lighting circuit of a neon tube 2 is provide with the neon tube 2 and a neon tube resistor 3 connected in series between switch terminals 1b and 1c of the three way switch. When the switch is OFF, the neon tube 2 is lit and, while the switch is ON, the neon tube 2 goes OFF. A bidirectional constant voltage diode 4 is connected to the lighting circuit in series to form a neon tube circuit 5. COPYRIGHT: (C)2004,JPO
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