Abstract: A fastener for jewelry has a closing body having two diametrically opposite ends as considered in one direction each provided with a stud arranged so that a space is formed between the body and an end of each of the studs, two rings provided on ends of a jewelry string and being passable through the spaces and settable on the studs, and a closing disc provided with pins which in a closed condition close the spaces between the closing body and the studs and therefore prevent unauthorized withdrawal of the rings, the disc being movable sideward in the first direction so as to displace the pins from the spaces and therefore allow a withdrawal of the rings from the studs through the spaces.

Abstract: A fastener for jewelry has a bottom body having a stud forming a male part, a safety disc movable relative to the bottom body between an open position in which it leaves a space between the stud and the safety disc and a closed position in which the space is not provided, a spring urging the safety disc to the closed position so that for displacing the safety disc from the closed position to the open position the safety disc has to be displaced against a force of the spring, and a female member connectable with the article of jewelry and placeable on the stud in the open position so that in the closed position the female member cannot be withdrawn from the stud.

Abstract: A fastener for jewelry articles includes a female component formed of two parts made of variable materials, having different shapes and dimensions, and defining an opening for receiving a male component, and a spring element for keeping the fastener in the closed condition thereof. The two parts are hingedly connected to each other. The female component further includes guides for guiding the male component in the opening, a retaining element for retaining the male component in the opening, and a ring secured to one of the two parts for attachment to an end of a jewelry article. The male component is a profiled plate having a hole cooperating with said retaining element to be held in the opening.