| 
 | The ornamental design for a chlorinator for swimming pools, as shown. | |||||||||||||||||
FIG. 1 is a top plan view of a chlorinator for swimming pools showing my new design;
FIG. 2 is a right side view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a bottom view thereof; and
FIG. 7 is a cross sectional view taken on line 7--7 of FIG. 1.
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