Abstract: An adapter for rotatably connecting a sprinkler head to a water-transporting standpipe having a cylindrical upper end. The adapter includes three parts: a cup-like base adapted to rest on the upper end of the standpipe in sealed fashion, a male stem adapted to rotatably and scalingly seat in the cup-like base, and an oversleeve adapted to fit over the stem and the base and to be locked to the upper end of the standpipe by threaded connection such that a portion of the male stem protrudes from the oversleeve to be secured to the sprinkler head for rotation therewith. The adapter is sealed at several points internally to positively prevent water leaks, and is easily disassembled for replacement, repair, or cleaning, by hand or with simple hand tools, since no permanent connection is required between the adapter, the standpipe, and the sprinkler head.

Abstract: An adapter assembly for mounting a hollow glass ornament such as a blown glass gazing ball onto a support structure, for example an upright sprinkler. The adapter assembly includes a cylindrical plastic body having a first end adapted to mate with a base opening in the glass gazing ball, and a second end adapted to fit into the support. A bolt is rotatably inserted through the adapter body, and its threaded tip engages a flexible retaining piece comprising an elongated strip of rubber-like material having a nut held therein for receiving the bolt. The flexible retaining piece is pre-assembled to the tip of the bolt, and then inserted endwise into the gazing ball opening until the adapter assembly can be rotated downwardly and then pushed axially into the opening while the second end of the flexible retaining piece is bent against the adapter assembly and pushed through to the interior where it unfolds.