| 摘要 |
PURPOSE:To effectively use a hand lamp as a hazard preventive sign, by both decreasing voltage of a storage battery through an electromagnet and utilizing the electromagnet as a fixed tool when a power source to the hand lamp with a bulb for use of a dry cell is used in place of the storage battery. CONSTITUTION:A main bulb 1 and subbulb 2 consisting of a miniature bulb for dry cell use are selected by a selector switch 3 while turned on through a relay 5 and jack 6 by an electric conduction circuit A with a dry cell 4 or an electric conduction circuit B with a storage battery. Now if the jack 6 is connected to the storage battery, the relay 5 is automatically turned off, and an electric current of the storage battery turns on the bulb 1 or 2 by dropping the voltage to dry cell voltage through an electromagnet 7 interposed in the circuit b. While this electromagnet 7 is used as a fixing tool for fixing a hand lamp to a prescribed position of an automobile. In this way, the hand lamp can be effectively used as a hazard preventive sign. |
