| 摘要 |
<p>Luminous indication system for electric locks, characterized in that it comprises a circuit (2) connected in series to an alternating supply voltage, suitable to allow the predominantly unidirectional flow of the current and to generate a constant voltage at its ends during said flow, the coil (6) of the electromagnet and a first rectifier diode (8), said circuit (2) comprising a diode (3) which is biased inversely with respect to said first rectifier diode (8), and furthermore characterized in that a local pushbutton (7) is arranged in parallel to said first rectifier diode (8), whereas a series connection of a second rectifier diode (10), of a luminous indicator (11) and of a semiconductor component (13) for controlling said luminous indicator (11) is arranged in parallel to said coil (6) and to said first rectifier diode (8), said semiconductor component (13) being driven by an oscillator (14) which is connected to said second rectifier diode (10) through a contact (17), said contact (17) opens when the door containing the electric lock is in a closed position. <IMAGE></p> |
