Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1975-07-11
1976-10-05
Blix, Trygve M.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244 1A, 244 42CG, 324 72, H05F 304
Patent
active
039847306
ABSTRACT:
A potential induced on the surface of an orbiting spacecraft is neutralized to the potential of a plasma through which the spacecraft is traveling by directing charged particles into the plasma from the spacecraft surface. The induced potential occurs in response to bombardment of the spacecraft surface by ambient charged particles which may be negative or positive. The charged particles directed into the plasma from the surface have the same polarity as the induced potential to provide the neutralization. The invention can be utilized to maintain different, electrically isolated segments of a spacecraft surface at the same potential to prevent electric discharges between the different parts and thereby protect electric circuits within the spacecraft. The invention can also be utilized to enable charged particle detectors on the surface of a spacecraft to operate more accurately so that the particles are not perturbed by a potential difference between the spacecraft surface and the plasma.
REFERENCES:
patent: 2578697 (1951-12-01), Gunn
patent: 3095163 (1963-06-01), Hill
patent: 3279176 (1966-10-01), Boden
patent: 3297281 (1967-01-01), Felici
patent: 3600632 (1971-08-01), Bright et al.
patent: 3733038 (1973-05-01), Ikrath et al.
patent: 3802625 (1974-04-01), Buser et al.
patent: 3826452 (1974-07-01), Little
Barefoot Galen L.
Blix Trygve M.
Manning John R.
Marchant Robert D.
The Unites States of America as represented by the Administrator
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