Improvements in electronic circuits for alarm alarm installations. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in electronic circuits for alarm warning installations, especially in circuits constituted by semiconductor devices associated with other components and powered independently and by a battery, characterized essentially by the provision of a voltage reducing, rectifying and filtering stage, associated with a general line and the entrance of a double switch with two positions, one of which corresponds to the operation of one or more lamps when the mains voltage is missing and the other to the alarm functional state, with a switch on the input in service, and, by derivation with it, an electric chain formed by a plurality of independent switches, associated respectively to the organs to be monitored and whose state of conduction or opening, at least of one of them, will correspond to the state of rest or operation of the alarm system. (Machine-translation by Google Translate, not legally binding)