| 摘要 |
The present invention entails a combination staircase and attic fan assembly designed to share a common attic opening formed within a structure. There is provided a foldable staircase assembly that is mounted adjacent said attic opening and movable between a first operative position within said attic opening to a second remote position outside the plane of said attic opening. In addition there is provided an attic fan assembly that is movably mounted adjacent said attic opening and movable from a first operative position within said attic opening to a second remote position outside of said attic opening. A connecting link is operatively interconnected between said staircase assembly and said attic fan assembly for moving the two in unison. Further there is provided a drive system for driving both the staircase assembly and attic for assembly between their respective positions such that when said staircase assembly assumes said first operative position said attic fan assembly is disposed in its second inoperative position and vice versa.
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