Mobile platform or platform to be used as floating workshop

In a mobile platform comprising a buoyant pontoon and at least three legs movable in vertical direction relative to said pontoon, said legs being connected to said pontoon by means of a lifting-locking mechanism provided in the proximity of each leg, with which mechanism said leg can be secured and moved relative to said pontoon, said mechanism comprising at least two horizontally movable locking means spaced one above the other, said locking means cooperating with lock recesses of the leg and fitting therein with clearance in vertical sense and one locking means being disposed in a framework, said framework being movable with respect to said pontoon by means of a jack system, said locking means being adapted to act in turn on said leg, and in which each lifting-locking mechanism is provided with a safety means comprising at least one element appertaining to each locking means, said elements recording the final positions of the locking means when said means have completed their movement, and a control circuit for the jack system;

• the improvement comprising a time relay in the control circuit of the jack system, said time relay interrupting the circuit when, after a previously set time which is shorter than the time needed to traverse said clearance, the locking means moving inwards and outwards have not yet reached their final positions, said elements which record said final positions also controlling said circuit in such a manner that they interrupt said circuit when all locking means have reached their final positions, and in which also the time relay is switched off.