Abstract: Disclosed is a connector assembly, which includes a metal base which defines a housing cavity arranged to receive the end of a male connector, a resilient interface element inside the housing cavity, and a metal clip inside the housing cavity by the resilient interface element. The metal clip engages removably with the end of the male connector inserted into the housing cavity to connect the metal base to the male connector. Also disclosed is a resilient interface element providing an interface between a male connector and a metal base defining a housing cavity to receive the end of a male connector, as well as a kit of parts. Such kit contains a metal base defining a housing cavity receiving the end of a male connector, a metal clip arranged to be capable of engaging removably with the end of the end of the male connector, and a resilient interface element.

Abstract: A fastener has provided particularly useful for mounting a panel to an underlying supporting structure. The fastener includes a socket component and a plug component. The socket component has a cup open at one end and an external spiral thread. The axis of the spiral thread is parallel with the open direction of the cup. The socket may be embedded in a predrilled aperture in a supporting structure by a rotary driving action. The wall of the cup provides a constriction or throat spaced from the bottom of the cup. The plug component has a base with an external spiral thread and a protrusion from the base. The base of the plug can be screwed into a predrilled aperture in a panel. A protrusion from the base extends substantially co-axial with the axis of the thread. The protrusion includes a head portion spaced away from the base. The protrusion is sized to enter the cup of the socket component and the head portion is sized to interfere with the throat but to be forcible past the throat.

Abstract: An area beam of electrons capable of delivering large doses of electron irradiation at small dose rates and having a predetermined distribution pattern is provided by an electron accelerator comprising plural discrete cathodes positioned as required to achieve the desired pattern. An individual emission control is provided for the filament of each cathode. In a preferred embodiment plural cathodes are movably mounted in a row extending transversely of the transport path of material to be irradiated, a plurality of such rows being positioned along the direction of transport.