Bar aerial for use on an automobile is fitted into a base unit that includes a locking element that prevents removal of the aerial

摘要

A roof mounted aerial [2] is mounted into a base unit [1] using a threaded bolt [5] section that locates in a captive nut [4] within a ball. The lower end of the bolt has a split bush into which is inserted a locking nipple [9]. This has a ring that engages a groove to prevent removal without the use of a tool [13].