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An improved buzzer, essentially characterized by the fact that on a U-shaped support a coil is fixed on its bottom, slightly protruding from its core, and on one of the branches of the support an L-shaped strip is fixed, with its vertex area of smaller width and winding, to give greater flexibility to the loose branch of the l, which faces the core of the electromagnet, is attracted by this in the current steps, making percussion at the end of the support that is slightly more advanced than the core. (Machine-translation by Google Translate, not legally binding)