| 摘要 |
A flasher module, installable on a ladder, incorporates multiple high-intensity light-emitting diodes (LEDs), which are coupled to an electro-chemical power source (battery or single cell). The LEDs may be wired for a continuous“ON”condition, but are preferably connected to flasher circuitry. For maximum visible intensity, the flasher circuitry is designed so that all LEDs flash simultaneously about one to two times per second. A first embodiment flasher module is sized to install within the uppermost portion of a ladder rail of C-shaped cross section. A second embodiment module, which provides a larger viewing angle, incorporates the LEDs within a bar that is mountable beneath the uppermost rung of the ladder. Either embodiment of the invention may be equipped with a gravity-actuated switch, which will turn on the flasher circuitry whenever the ladder is deployed at an angle greater than 45 degrees from horizontal.
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