| 摘要 |
PURPOSE:To save labor for turning ON and OFF the anchor lights and navigation lights, by utilizing the action of semiconductors, automatically turning ON the anchor light when the ship is at anchor and also turning ON the navigation lights and the like during the navigation at sunset, and turning them OFF at sunrise time. CONSTITUTION:In order to turn ON and OFF the anchor light T1 when the ship is at anchor, a switch SW1 is closed. Then, a current flows to a relay RL1 and a base voltage regulating resistor R1, contact points (a) and (b) of the relay RL1 are contacted, and the current flows to the anchor light T1 to light the anchor light T1. When the illuminance increases at sunrise, the internal resistance of a photoelectric element T11 is quickly decreased based on the action of the photoelectric element T11, the current continues to flow to the negative direction as an optical current, a transistor TR1 is reversely biased and turned OFF, the current, which has flowed from the relay RL1 to the collector and then to the emitter of the transistor TR1 is stopped, the contact points (a) and (b) of the relay RL1 are opened, and the anchor light T1 is turned OFF. |
