First and second housings of a metal sheet are superposed over each other and fixed to each other by bolts to form an element receiving space. By locking the spring housing and leg section together, a crank shaft can move a main housing relative to the leg section to enable the assembly to raise and lower the vehicle in the manner of a conventional screw jack assembly. The distributed space-time codes can achieve full cooperative diversity and full rate. The probe has a tip which can be engaged with a rodent’s paw through the floor of the enclosure.