Ring has interchangeable stone mounted on swiveling arms which fit through slots in ring and swivel up into grooves on its inner surface where they are held in place by spring-loaded balls

摘要

The ring has an interchangeable stone (2a). This has a mounting (2) with swiveling arms (9, 10) on its base. These fit through slots (5, 6) in the ring and swivel up into grooves (13, 14) on its inner surface. The arms are held in place by spring-loaded balls (15, 16).