System for discharging and otherwise controlling electric charge

Details System for discharging and otherwise controlling electric charge System for discharging and otherwise controlling electric charge

1988-12-09

1990-12-25

Pellinen, A. D.

Electricity: electrical systems and devices

Discharging or preventing accumulation of electric charge

Structurally combined with building or vehicle

361220, 361225, H05F 306

Patent

active

049807951

ABSTRACT:
A method and apparatus for discharging electric charge accumulated on an object tht expels an electrically conductive gas flow, such as a jet engine, a rocket, or a helicopter or aircraft with an internal combustion engine. The system has an electrical shield surrounding a portion of the gas flow, and an electrode for imposing an electric potential in the shielded gas flow. A servo controller measures the accumulated charge at a point on the object and creates a control signal responsive to the rate at which charge is accumulating. The servo controller imposes an electric potential on the electrode, and hence the gas flow, of an amount and polarity determined by the rate and polarity of charge accumulation. In so doing, the electrode accelerates charges of opposite polarity in the conductive gas away from the object, and deaccelerates like charges towards the object, where they tend to cancel accumulated charges, thus discharging the object.

REFERENCES:
patent: 3035208 (1962-05-01), Clark
patent: 3600632 (1971-08-01), Bright et al.
patent: 3733038 (1973-05-01), Ikrath et al.
patent: 3874616 (1975-04-01), Buser et al.
patent: 4228479 (1980-10-01), Larigaldie et al.
M. Brook et al., A Helicoper Electric Charge Control Study: A Report of W Performed under ONR Contract N00014-84-K-0623 during the Contract Period from Aug. 1, 1984 through Jul. 31, 1986 (Jul. 3, 1986, cover date).

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