Sustaining timer for a safety light

Communications: electrical – Systems – Timer control

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Details

340321, 340331, 340432, 340429, 362473, G08B 100

Patent

active

059529130

ABSTRACT:
An array of randomly flashing warning lights comprised of high intensity Light Emitting Diodes, alert observers to the presence of moving vehicles or pedestrians. Motion sensors such as tilt, reed, or mercury switches can be used to achieve randomized flashing while vehicle or pedestrian are in motion. Dynamic forces, generated by motion, cause sensor contact closures which, in turn, produce short duration pulses of light to be emitted by the LED array. When motion ceases, an auxiliary circuit automatically causes the LED array to continue flashing for a period of about one-minute. The extended period of flashing will continue to alert observers should the vehicle or pedestrian stop for a traffic light, stop sign, or sundry other reasons. Termination of the warning light's activity will result in a power-down state wherein power consumption becomes so minute it eliminates the need for an on-off switch.

REFERENCES:
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patent: 4468656 (1984-08-01), Clifford et al.
patent: 4847589 (1989-07-01), Dobbins
patent: 5175528 (1992-12-01), Choi et al.
patent: 5633623 (1997-05-01), Campman
patent: 5667290 (1997-09-01), Cioletti

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