| US 7,483,255 B2 | ||
| Ionizing electrode structure and apparatus | ||
| Peter Gefter, So. San Francisco, Calif. (US); Scott Gehlke, Berkeley, Calif. (US); and John K. O'Reilly, San Francisco, Calif. (US) | ||
| Assigned to Ion Systems, Alameda, Calif. (US) | ||
| Filed on Feb. 13, 2006, as Appl. No. 11/353,760. | ||
| Application 11/353760 is a continuation in part of application No. 10/459865, filed on Jun. 11, 2003, granted, now 7,339,778. | ||
| Prior Publication US 2006/0176641 A1, Aug. 10, 2006 | ||
| Int. Cl. H01H 50/12 (2006.01) | ||
| U.S. Cl. 361—213 [361/212] | 17 Claims |
| 1. Ion-forming apparatus including an ionizing electrode comprising:
a conductive filament forming the ionizing electrode configured as an elliptical loop devoid of conductive elements within
the loop;
a support for the filament including a conductive connection thereto for applying high ionizing voltage;
a dielectric channel including walls surrounding the conductive filament for confining a stream of flowing gas about the filament
in a direction substantially aligned with a major axis of the elliptical loop; and
a reference electrode disposed outside the dielectric channel near the elliptical loop of conductive filament along a direction
aligned with a minor axis of the loop.
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