Abstract: A spool for use with a swimming pool cover or with a shade cover. The spool has a roller assembly, and a cover (not shown) may be wound onto the roller assembly or unwound from the assembly. The roller assembly has a pre-tensioned rubber strip that when viewed in transverse cross-section is substantially rectangular in shape and two opposing sides of the rectangle are notched. This strip is tensioned when the cover is unwound from the spool and a locking mechanism retains the cover in a desired unwound position against the tension of the rubber strip.

Abstract: A hub cap (10) is fitted to the outer end of a wheel hub (11) containing a wheel bearing (14) to seal the outer end of the hub (11). The hub cap (10) has a cylindrical housing (16) which is provided with a transparent outer end wall (17) to permit the level of lubrication around the bearing (14) to be ascertained visually. The cylindrical housing (16) has an aperture within which a plug (22) is fitted. The plug (22) has a flexible diaphragm (21) which deforms to accommodate pressure changes within the hub cap (10). The hub cap (10) is particularly suitable for wheel bearings of trailers, such as boat trailers.

Abstract: A security fence includes a panel of chain wire mesh supported by posts having lower portions and upper portions. The lower portions and the upper portions of the fence posts are connected by a flexible member so that the upper portions are resiliently deflectable. The upper portions support a barrier of barbed wire. The flexible member and the upper portions are located above adult height so that efforts to climb the fence causes the upper portions to resiliently deflect down onto the person attempting to climb the fence.

Abstract: A solar absorber assembly (13) having upper and lower connectors (14, 15) between which tubes (16) extend for conveying water to be heated, the tubes (16) being surrounded by a glazing assembly (17) which is supported by the connectors (14, 15). The connectors (14, 15) may be connected with adjacent connectors (14, 15) of adjacent assemblies (13) to form a fence panel (11) which can be supported by posts (12), the fence panel (11) also serving as a security fence for swimming pools.