Closed loop electrostatic levitation system

Details Closed loop electrostatic levitation system Closed loop electrostatic levitation system

1982-10-29

1985-06-04

Ruggiero, Joseph

Boots, shoes, and leggings

74 56D, 156DIG62, 364453, G06F 1520

Patent

active

045218544

ABSTRACT:
An electrostatic levitation system is described, which can closely control the position of objects of appreciable size. A plurality of electrodes surround the desired position of an electrostatically charged object, the position of the object is monitored, and the voltages applied to the electrodes are varied to hold the object at a desired position. In one system, the object is suspended above a plate-like electrode (16, FIG. 1) which has a concave upper face (26) to urge the object toward the vertical axis (20) of the curved plate. An upper electrode (18) that is also curved can be positioned above the object, to assure curvature of the field at any height above the lower plate. In another system, four spherical electrodes (81-84, FIG. 6) are positioned at the points of a tetrahedron, and the voltages applied to the electrodes are varied in accordance with the object position as detected by two sensors (94,96 FIG. 4).

REFERENCES:
patent: 3269179 (1966-08-01), Anderson
patent: 3534926 (1970-10-01), Wuenscher
patent: 3741500 (1973-06-01), Liden
patent: 3847026 (1974-11-01), Boltinghouse et al.
patent: 3902374 (1975-09-01), Hoffman et al.
patent: 4443855 (1984-04-01), Bishop et al.

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