| 摘要 |
High security lock device comprising a half-turn bolt and at leats one lock bolt both actuated by means of an electric motor through a linkage of which the opening and closing are controlled by means of an electric circuit for the power supply of the motor and which is provided with a plurality of contacts actuated by the linkage of a contact actuation device mounted in the door frame and decoding and control devices respectively. The disclosed device further comprises a relay (21) of which the contacts (a, b, c) control the current flow to the motor (16) and of which the winding is energized to reverse by toggling of its contacts the polarity of the supply voltage to the motor in order to make it rotate in the reverse direction in the case of a blocking caused by jamming of the bolts during closure, or in order to open. |
