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Priority to ES1973199142UpriorityCriticalpatent/ES199142Y/en
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Publication of ES199142YpublicationCriticalpatent/ES199142Y/en
Alarm drive device essentially characterized in that it is constituted by a transparent plate or glass, which has attached on one of its faces a fine conductor wire connected to the alarm device, in such a way that when the plate is broken the aforementioned conductive wire is cut off, whereby the alarm device comes into operation, due to the lack of voltage between the terminals of an electronic device capable of closing a power circuit. (Machine-translation by Google Translate, not legally binding)
Electrical device to eliminate the rupture spark in the contacts when opening the circuit. (Machine-translation by Google Translate, not legally binding)