1º_ Usually metallic piece in the form of a somewhat conical glass containing a hammer or badajo hanging inside. The goal is to shake it so that when they hit each other they produce a sound. It is a toponym ("name related to a geographical place") as it comes from the so-called "vessel of Campania", which was made of a bronze of excellent quality. 2º_ By extension of the previous one, any cover in the form of an inverted glass to isolate or protect the contents. 3º_ It is also said of the lookout, especially of the thief who is outside the site of a robbery listening in case the police come and thus alert the rest of the gang for the escape. From the Italian jargon campane ( "ear" . 4º_ Name of several geographical places.
