| 摘要 |
The disclosed safety light (15) is designed to provide automatic operation for safety lights placed on rotating assemblies such as wheels, flying disks, and etc. Safety light (15) comprises a battery (20), acceleration/motion sensor (22), photo sensor (24), and illumination device (26) placed substantially in series with one other. Battery(20) provides electromotive power to operate all circuitry. The acceleration/motion sensor(22) is designed to conduct current when a specific acceleration or motion is detected. The photo sensor (24) conducts current when photo detector(25) detects a sufficiently low level of light. When both acceleration sensor(22) and photo sensor(24) are conducting, current will flow and illuminate illumination device(26). Alternatively, a time delay may be added to the acceleration/motion sensor(22) to delay shut-off of current to the illumination device(26), and a time delay may be added to the photo sensor(24) to delay turn-on of current to illumination device(26) when light level is suddenly reduced.
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