| 摘要 |
A wind-directed ventilator hood assembly for a narrow elongated air exit opening in the roof of a farm building spanning a long portion of the roof, including hood supporting uprights projecting upwardly from the air exit opening at plural spaced locations, a horizontal elongated pivot shaft journaled in the uprights above the exit opening, and a pivoted elongated hood for covering the opening having transverse beams and a hood roof covering the beams. The hood roof has downwardly diverging side panel portions inclined about 90 DEG to each other and the beams are fixed to said shaft for rotation therewith between a first position opening toward one of a pair of upwardly inclined roof sections with a side panel portion disposed vertically adjacent one roof section and a section position opening toward the other roof section. A wind vane is supported for movement responsive to wind force to activate a vane direction sensing mechanism and driving the hood to the first and second hood positions.
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