Traffic marker

Details Traffic marker Traffic marker

1979-09-04

1981-09-29

Caldwell, Sr., John W.

Communications: electrical

Digital comparator systems

340114B, 116 63C, 40612, 200 6152, 200 6183, 362394, 362802, E01F 900, H01H 3502

Patent

active

042926270

ABSTRACT:
A traffic road marker has an upright translucent shell supported on a weighted base. The shell contains a battery and light bulb operated by a self-actuating switch which engages when the shell is placed in an upright position. Optionally connected in the circuit are a circuit interrupter to flash the light bulb and a photocell to shut the circuit off during daylight hours.

REFERENCES:
patent: 2905863 (1959-09-01), Martin et al.
patent: 2972739 (1961-02-01), Opper
patent: 3414858 (1968-12-01), Huffman et al.
patent: 3660817 (1972-05-01), Abrams

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