Abstract: The device includes at least one sliding bolt in a disengaging mechanism, and at least one movable pin arranged to lock said disengaging mechanism and prevent movement of the bolt. It is mounted in a housing (10) and consists of two identical control modules (11, 12) each having an arm (11a, 12a) which is fast on a lever (13) controlling the movable locking pin (14). Each module is mounted on a base plate (11b, 12b) supporting a mechanical activating device (11c, 12c) and a device for controlling this device and pushing the arm (11a, 12a) by means of a detent pin (11d, 12d). The activating device comprises at least one potential energy storage element while the module comprises a device for arming this element. A programmable electronic timing device and a member coupled thereto are provided for releasing the potential energy at a predetermined time. Each module has an independent power supply from cells or batteries (11e, 12e). A display device (11f, 12f) provides control parameter display.