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US 5,141,529 AGranted
Dust precipitation from air by negative ionization
AssigneeNeg-Ions (North America) Inc.
InventorsClive C. Oakley, Reginald R. Robertson
Life of this patent
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AssigneeNeg-Ions (North America) Inc.
InventorsClive C. Oakley, Reginald R. Robertson
Estimating the term…
A system for precipitating dust includes providing a screen arrangement either in the form of a ceiling with walls or in the form of a canopy with the screen being penetrable by air. Inside the screen and particularly adjacent edges of the screen or the canopy there are provided negative ion emitters positioned in rows so as to generate a curtain of ions precipitating the dust from the air onto the ground for collection. Within the screen can be defined either a clean zone or the screen can be used to confine a dust producing process so as to precipitate the dust immediately adjacent the process to prevent it spreading to other areas. Emitters are provided in the form of a carbon fiber yarn which projects outwardly through openings in a channel member with the yarn being doubled back upon itself in some cases to provide a highly directional emission.
A method of precipitating particles from air within a building comprising defining a zone within the building at least partly separated from a remaining part of the building, defining fixed partitions between the zone and the remaining part of the building which partitions are at least partly formed by a screen formed of a material which is perforated to allow transmission therethrough of air and light, and mounting within the zone a plurality of emitters of negatively charged ions so as to precipitate the particles downwardly onto a floor of the zone.
An emitter of negatively charged air ions for use in precipitating particles from air within a building comprising a rigid elongate channel member defining a hollow interior extending therealong and having a closed front surface, a continuous fibrous conductor mounted in the channel member rearwardly of the front surface and extending along the channel member, means defining a plurality of openings in the front surface through which portions of the fibrous conductor project, and connector means on the channel member for connecting a high voltage to the conductor such that the exposed portions of the conductor generate ions in air exposed to the conductor forwardly of the front surface.
Dependencies are inferred from the claim text.