Abstract: In the fluid coupling for connecting the fluid passages of a plug (1) and a socket (2), a valve (33), a valve holder (31) and a spring (32) disposed in a compressed state between the valve (33) and the valve holder (31) are accommodated inside each of the plug (1) and the socket (2) to be connected to each other the plug (1) is inserted into the socket (2), the valve (33) of the plug (1) and the valve (33) of the socket (2) make contact with each other so that the valves (33) are retracted resisting an urging force of the spring (32). This fluid coupling further includes conical members (32, 51) which form a conical external shape along a line connecting the outside diameter portion of the valve (33) and the outside diameter portion of the valve holder (31) when the valve (33) of the plug (1) and the valve (33) of the socket (2) make contact with each other, so that the springs (32) are compressed between the valve (33) and the valve holder (31).

Abstract: A necklace which openably closes at clapsed ends meant to be worn centered at the nape of the wearer's neck is provided with a decorative element mounted on a slider which is slidably received on the necklace. The internal transverse sectional profile of the slider at least generally corresponds to the external transverse sectional profile of the chain or strand of the necklace, so that the decorative element always will slide under the influence of gravity to the frontal lowest part of the necklace, but will remain having a facing-outward disposition generally centered heightwise on the chain or strand of the necklace. By preference the chain or strand of the necklace is an elongated flexible element of flattened oval or rectangular transverse sectional shape.