Abstract: An antenna may have features to ameliorate ice accumulation thereon. For instance, the antenna may include a feed structure between a reflector and a radome. The radome may cover at least a portion of the antenna and/or components of the antenna. A heating element may be located at various locations on the feed structure of the antenna. The heating element may heat the radome or other aspects of the antenna. The heating element may heat the radome or other aspects by infrared radiation, and/or via circulating warmed air. A fan may be provided to promote circulation of warmed air. The heat ameliorates ice accumulation the antenna so that ice accumulation does not diminish the electromagnetic performance of the antenna.

Abstract: A locking strut for use on sliding doors, windows and other sliding closures. The locking strut is supplementary to any closure lock. The strut has at least one receiver in the bottom surface to receive one or more guide rails included in the guide channel of the casement. The apparatus also preferably includes a hold or holds that allow easier insertion and handling. One strut may be used in the casement both when the sliding door is in the open position and the closed position. This is allowed by having one end received in the casement upright in a first orientation for a first slider position. The other end does not fit within the casement in a second slider position. This allows the strut to serve as both a supplementary locking device and as a threshold cover to exclude debris from the guide channel when the slider is open.

Abstract: A locking strut for use on sliding doors, windows and other sliding closures. The locking strut is supplementary to any closure lock. The strut has at least one receiver in the bottom surface to receive one or more guide rails included in the guide channel of the casement. The apparatus also preferably includes a hold or holds that allow easier insertion and handling. One strut may be used in the casement both when the sliding door is in the open position and the closed position. This is allowed by having one end received in the casement upright in a first orientation for a first slider position. The other end does not fit within the casement in a second slider position. This allows the strut to serve as both a supplementary locking device and as a threshold cover to exclude debris from the guide channel when the slider is open.

Abstract: In a pneumatic discharge outlet a rotatable discharge conduit attached to a rotatable lading control valve extends outboard of the outlet end wall. Operating handles to move a lading control valve between open and closed positions are located on the discharge conduit. Laterally spaced large headed bolts extending outwardly parallel to the discharge conduit, are threaded into respective threaded portions of the operating handles. In moving the valve element between open and closed positions, the large headed bolts move circumferentially about the hub with the handles. An outlet end cap includes laterally spaced end cap lugs having openings through which the large headed bolts pass. In closed position the heads of the large headed bolts engage the end cap lugs to hold the end cap in closed position. To remove the end cap the large headed bolts are rotated an amount sufficient to free the end cap lugs from the large headed bolts so that the end cap may be removed from the discharge conduit.