| 摘要 |
<p>The safety device for contact locks, readers of keys and mechanisms consists of the functional association of a safety mechanism 1/sensor unit 2 assembly and of a control unit 4, both joined by a common line with only two wires, the safety mechanism/sensor unit assembly being formed by two resistors and two microswitches as well as by stabilising elements, while the control unit comprises an integrated circuit which contains four operational amplifiers, with associated circuits and a power supply source stabilised by an integrated regulator, means for supplying sufficient current having been provided for the indicators and alarm devices 10 as well as a cabinet inside which the system is housed. <IMAGE></p> |
