Communications: electrical – Traffic control indicator – Portable
Patent
1988-12-09
1990-02-27
Crosland, Donnie L.
Communications: electrical
Traffic control indicator
Portable
340908, 340427, 340321, 340908, 340917, 340942, 364900, 315149, 315155, 315159, 250215, 250239, 307 108, E01F 900, G08G 100, B60Q 700
Patent
active
049049984
ABSTRACT:
In a lighting peg with a variable pulsation rate including a square outer casing provided with a solar cell and a battery and adapted to be installed at an intersection of two roads, light emitting diodes and a photoelectric conversion element are provided on each side surface of the square outer casing. An ambient light sensor for detecting ambient light and a pulse signal generating circuit for generating pulse signals are further provided together with vehicle sensors, each including the photoelectric conversion element, a differential circuit and a comparator. A control circuit including OR gates for receiving the outputs of the vehicle sensors, discriminating circuits for discriminating the outputs of the OR gates and pulsation rate control circuits for controlling the rate of pulsation are further provided in the lighting peg so that, when a vehicle approaches the road intersection along a first road is detected by one of the vehicle sensors, the rate of pulsation of light emitted from the light-emitting diodes into the second road is varied in a predetermined manner.
REFERENCES:
patent: 4290047 (1981-09-01), Latta, Jr.
Crosland Donnie L.
Kictec Incorporation
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