Abstract: A deployment and retraction arrangement for a slot cover which is adapted to cover or seal a longitudinally extending slot or space present between at least two adjacent located membranes or panels. More particularly, the arrangement is a rollable deployment and retraction arrangement for selectively deploying and retracting a slot cover employed for covering a slot or space present intermediate two adjacent membranes or panels so as to, preferably, prevent any FR leakage through the slot during radar operation of the panels.

Abstract: A portable, adjustable structure for supporting an equipment unit at a distance above a support surface has a lower tower structural member placed on the support surface. Pivot support structural members are affixed to the lower tower structural member in a manner whereby the pivot support structural members are upright relative to the support surface. A plurality of struts are utilized to stabilize the lower tower structural member and the pivot support structural members on the support surface. A tower member is pivotally mounted on the pivot support structural members. The tower member has spaced opposite first and second ends. The equipment unit is affixed to the tower member at the first end thereof. The tower member is pivotally movable to a position substantially perpendicular to the support surface with the first end thereof spaced farther from the support surface than the second end thereof. Ballast is affixed to the tower member at the second end thereof.

Abstract: A vane pivotally mounted atop a wind turbine, rotatably mounted on a support structure, rotates freely with the wind. A cam is affixed to and rotatable with the vane. A toothed wheel is stationarily affixed to the support structure. A pair of pawls are mounted atop the wind turbine in operative proximity with the cam and the toothed wheel. Thus, when the vane rotates to align itself with a new wind vector, the cam rotates with the vane and disengages one of the pawls from the toothed wheel thereby permitting the wind turbine to rotate in the direction of rotation of the vane until the wind turbine is aligned with the vane at which point both the pawls engage the toothed wheel, locking the wind turbine in aligned position with the wind.