| 摘要 |
A temperature actuated foundation ventilator comprises a rectangular housing with top, bottom and side walls, air permeable screens on the front and rear walls, a plurality of louvers extending between the side walls and a bi-metallic element for actuating the louvers into closed position in cold weather and into open position in hot weather. The bi-metallic element is exposed to the ambient temperature exteriorly of the housing and at the same time enclosed within a protective cover which includes means for positively supporting the bi-metallic element in operative position. Movement of the bi-metallic element responsive to changes in temperature causes corresponding movement of a control link connected to the bi-metallic element exteriorly of the housing and extending into the housing and into pivotal engagement with each of a plurality of louvers journaled in opposed side walls of the housing.
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