This is a rotatory mechanism for engaging a record and turntable, which comprises complementary projections central to both components. Diametrically opposed across the record hole are projections that are undercut. Upon insertion and twisting, they interlock with complementary projections on the spindle. The actual shape is more like a small doubleblade propeller, but the configuration is not different in concept from that commonly seen in automobile gasoline and oil tank caps.--DSG
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.