Aircraft warning marker assembly for power lines

Details Aircraft warning marker assembly for power lines Aircraft warning marker assembly for power lines

1976-10-04

1977-07-19

Caldwell, John W.

Communications: electrical

Selective

Having indication or alarm

240 12, 340114R, 340331, 340333, G08G 500, B64F 118

Patent

active

040371913

ABSTRACT:
Aircraft warning marker assemblies for marking power transmission lines are often suspended from the power line itself and are in a few cases equipped with a flashing light energized with power obtained from the power line. The assemblies have in the past been subject to physical failure caused by wind induced vibrations in addition to damage from corona discharges and tracking over non conductive parts. The present invention discloses means for alleviating these problems. The marker assembly, which is made up of a cone-like structure supported by a hanger system, employs vibration absorbing means between the hanger system and the cone-like structure to dampen vibrations of the marker assembly, and thereby reduces the possibility of physical damage from the wind. In addition, a ring of electrically conductive material at the bottom of the cone functions as a "corona ring" in shielding the assembly from corona effects and tracking.

REFERENCES:
patent: 1820534 (1931-08-01), Francotte
patent: 2095306 (1937-10-01), Austin
patent: 3124712 (1964-03-01), Alexander

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