Instrument for air ionization
Abstract
Abstract An air ionizer is provided of the type in which a corona discharge is produced at the point of a sharp `needle` by connecting it to a source of high potential. One or more needles, mounted in an insulator, point in a direction opposite to the eventual flow of air ions. At ions emitted from the point of the needle are reflected by a reflector. The reflector may comprise a sheet of insulating material or an electrically conductive material, e.g. a metal, mounted on insulators. The reflector may be provided with perforations for the passage of air therethrough such that the ionizer may, with advantage, be placed in a moving air stream. The insulator on which the needle(s) is or are mounted may comprise a polythene cable or a printed circuit board.
Inventors
- 👤 Cecil A. Laws
Bibliographic Details
Claims Analysis
Total Claims: 11References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |