Internally powered traffic control device

Details Internally powered traffic control device Internally powered traffic control device

1976-02-04

1977-09-27

Byers, Nile C.

Road structure, process, or apparatus

Traffic director

Vibration inducing member

350 97, 362145, E01F 1100, E01F 908

Patent

active

040508340

ABSTRACT:
A traffic control device in which a solid state light source such as a light emitting diode (LED) is energized by a power supply such as a battery pack contained within the device. The battery life and conspicuousness of the device are enhanced by providing a network which includes an oscillator circuit and a photocell for intermittently energizing the LED only when the intensity of the ambient light is below a predetermined level. In a preferred embodiment, a plurality of LED's are sequentially energized to enable directional control.

REFERENCES:
patent: 3164071 (1965-01-01), Rubenstein
patent: 3737647 (1973-06-01), Gomi
patent: 3836275 (1974-09-01), Finch
patent: 3873880 (1975-03-01), Riddell
patent: 3879148 (1975-04-01), Eigenmann
patent: 3894225 (1975-07-01), Chao
patent: 3920346 (1975-11-01), Wyckoff

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