Lighting peg

Details Lighting peg Lighting peg

1988-12-09

1990-05-29

Crosland, Donnie L.

Communications: electrical

Traffic control indicator

Portable

340908, 340427, 340321, 340917, 340942, 315149, 315155, 315159, 250215, 250239, 307 108, E01F 900, G08G 100, B60Q 700

Patent

active

049299425

ABSTRACT:
A lighting peg having a solar cell and a battery installed in a casing including a number of sensors each including a photoelectric conversion element mounted on a side surface of the casing, a differential circuit provided on the subsequent stage of the conversion element, and a comparator which delivers a high level output when the output of the differential circuit exceeds a predetermined value. A multivibrator generating a series of pulses, and a counter for counting a predetermined number of pulses are also provided, so that when either of the sensors detect light having a variation rate larger than a predetermined value, the multivibrator starts generating pulse for energizing a number of light-emitting elements also provided on the side surface of the casing, and the flashing operation of the light-emitting elements continues even after the termination of the detection of the aforementioned condition, until the counter starting the operation at that terminating instant completes the counting of the predetermined number of pulses.

REFERENCES:
patent: 3790848 (1974-02-01), Lai
patent: 3901813 (1975-08-01), Potopinski
patent: 3965388 (1976-06-01), Brisk
patent: 4290047 (1981-09-01), Latta, Jr.

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