| 摘要 |
A flasher bulb including a thermal shorting element that alternately shorts and opens only a portion of the bulb filament, thus causing the flasher bulb to produce an alternating high-low illumination. The thermal element is activated by current passing through the element, rather than by heat from the filament. The amount of brightness differential between the “high” and “low” illumination of the flasher bulb is determined by the amount of bulb filament that is shorted out when the thermal element inside the bulb is in the closed position. When a plurality of such flasher bulbs are placed in the sockets of a series-wired light string, they cause the light string to exhibit a random high-low twinkle.
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