(57) A plug (2) has an insulating housing (4) and two elongate, conductive, connecting
pins (6) which each extend within a tubular bore (10). Each pin (6) is wholly within,
and does not project relative to, its respective bore (10). Each pin (6) carries a
resilient, conductive lantern spring (14) to enable good electrical contact between
the pin (6) and a socket (22). The socket (22) has a housing (24) of insulating material
defining a tubular sheath which extends around and insulates a substantially cylindrical,
tubular, conductive socket (30). This socket (30), with its insulating sheath (26),
is receivable within the corresponding bore (10) in the plug (2). In the connected
position, the pin (6) is received within the socket (30), and the socket (30) is insulated
both by its sheath (26) and by the housing (4) of the plug (2) such that the electrically
conductive parts are completely inaccessible from the outside.
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