| US 7,391,599 B2 | ||
| Low voltage modular room ionization system | ||
| William S. Richie, Jr., Pennsville, N.J. (US); Richard D. Rodrigo, Line Lexington, Pa. (US); and Philip R. Hall, Ottsville, Pa. (US) | ||
| Assigned to Illinois Tool Works Inc., Glenview, Ill. (US) | ||
| Filed on Nov. 02, 2006, as Appl. No. 11/555,949. | ||
| Application 11/555949 is a division of application No. 10/626300, filed on Jul. 24, 2003, granted, now 7,161,788. | ||
| Application 10/626300 is a continuation of application No. 10/299499, filed on Nov. 19, 2002, granted, now 6,643,113. | ||
| Application 10/299499 is a continuation of application No. 10/024861, filed on Dec. 18, 2001, granted, now 6,507,473. | ||
| Application 10/024861 is a continuation of application No. 09/852248, filed on May 09, 2001, granted, now 6,417,581. | ||
| Application 09/852248 is a continuation of application No. 09/287935, filed on Apr. 07, 1999, granted, now 6,252,756. | ||
| Claims priority of provisional application 60/101018, filed on Sep. 18, 1998. | ||
| Prior Publication US 2007/0070572 A1, Mar. 29, 2007 | ||
| Int. Cl. H01T 23/00 (2006.01); H05F 3/04 (2006.01) | ||
| U.S. Cl. 361—231 [361/230; 361/229; 361/213] | 20 Claims |
| 1. An electrical ionizer having an ion emitter and positive and negative high voltage power supplies associated with the ion
emitter, the electrical ionizer comprising:
(a) a software-adjustable memory for storing a balance reference value, the balance reference value being user adjustable;
(b) a comparator for comparing the balance reference value to a balance measurement value taken by an ion balance sensor located
close to the ion emitter; and
(c) an automatic balance adjustment circuit for adjusting at least one of the positive and negative high voltage power supplies
if the balance reference value is not equal to the balance measurement value, the adjustment being performed in a manner which
causes the balance measurement value to become equal to the balance reference value.
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