Pressure stabilizing assembly

Claim 1

A combination of an enclosure and a pressure stabilizing assembly for use in the enclosure for generally equalizing the pressure within the enclosure and the atmosphere during rapidly developing low pressure atmospheric conditions, said enclosure having an enclosure wall for the mounting of the assembly and an eave, and said assembly comprising a. a chamber defining means, said means including two side wall members, a top wall member, a bottom wall member, and first and second end wall members, portions of said side wall members, said top wall member, and said bottom wall member being for receipt within the wall of the enclosure, and portions thereof extending outwardly from the enclosure wall to the exterior of the enclosure and within an opening in said eave, b. said first end wall member being solid and rigid and for location exteriorly of said enclosure, c. said second end wall member for terminating said chamber means within the enclosure, and said second end wall member comprising means for allowing the flow of air between the chamber and the interior of the enclosure, said second end wall member including a continuous grid wire screen, d. means defining an opening in a portion of the bottom wall member for location exteriorly of the enclosure, and exteriorly of said eave, e. a plate for normally covering said opening in said bottom wall member, f. means for pivotally mounting said plate for movement between a first position wherein said plate closes off said bottom wall member opening, and a second position wherein said plate allows the passage of air from the interior of the chamber to the exterior of the enclosure, g. means for biasing said plate into said first position, said plate being movable from said first position only against the bias of said biasing means.