(under subclass 294) Structures having a movable closure which, in uncovering one accessible portion of the housing, covers either another accessible portion or a movable closure therefore, and thus permits access to one portion of the housing while preventing access to another previously accessible portion. Includes a movable wall or frame member having an access opening therein which is adjacent one accessible portion of the housing, the wall or frame member being shifted in order to position its access opening adjacent other accessible portions of the housing.
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324, for at least two closures which pivot to housed position in opposite directions, either closure permitting complete access when swung open through an arc of 90 degrees, but blocking another closure when swung 180 degrees.