Abstract: A rotatable payload support turret for operation in a potentially hazardous environment includes a fixed element attached to a vehicle or fixed structure and a rotatable element, supported for rotation with respect to the fixed element. The turret includes a camera payload having a pointing direction configured to be upwardly pointing. An annular clearance gap formed between the fixed element and the rotatable element is sealed by a conventional gas tight magnetic fluid seal element. A wiper seal is also provided in the clearance gap between the location of the magnetic fluid and the external environment to prevent breakdown of the magnetic fluid by elements of the potentially hazardous environment. The clearance gap may also form a labyrinth seal having up to three legs that are oriented to oppose a gravitational force direction.

Abstract: A interim holder of open framework construction for computer diskettes comprising a base portion including a rear member, a pair of forwardly extending side members, and end members which preferably extend downwardly from the respective forwardly extending side members to provide an inclination of the plane of the base member from the rear member to the forward end members. An upper rack portion is attached to the base portion and includes a pair of rearward elements which extend upwardly from the respective base side members with angular members having portions extending laterally, forwardly and inwardly from the respective rearward elements and forming an overall generally rectangular configuration in the horizontal plane, the angular members providing respectively rearward, lateral and forward support to diskettes in the holder.