| 摘要 |
A compound cover made up of a pair of cover parts of a diameter substantially the same as the kettle. The cover parts rest on the kettle in stacked arrangement, and are rotatable relative to each other. The parts have hole, therethrough in a common pattern, and can be rotated to put the holes in complete register, and out of register where all the holes are completely blocked. The cover parts are of inverted conical shape to facilitate drainage of condensed water back into the kettle. In a modified form, the parts have stepped formation at the periphery for fitting any of a series of different sized kettles within a wide range.
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