| 摘要 |
PURPOSE:To prevent the accident of break of a light source during the use by counting the total use time of the light source and driving and controlling a warning means when said time reaches a use limit time. CONSTITUTION:A remote control signal M of a warning device 500 is connected to the remote signal of a light control circuit, and the power supply time of the light source is counted by a mechanical counter 591 as a counting means in the device 500 when the light source is lit. When the use limit time set preliminarily to the counter 501 is equal to the use time inputted from the signal M, a relay 502 is driven to drive and control a warning lamp 503. The light source lamp is replaced when the lamp 503 is lit, thereby preventing the accident of break of the light source during the use. |
