FIRST              PROTOTYPE

The chair in pvc private of the four legs and rests feet in tubular
the piston of the pitch and the bar to U of support of the chair.
the axis of an automobile that concurs the spin in the sense of the rolling
The cassette electrical worker, of color gray, door to its inside the circuit of power for the commando of the elettrovalvole and the converter a/d for the reading of the potenziometri that they serve from encoder.

To the potenziometri that they find the position of the pistons and therefore of the chair, it has been fixed on the axis a disc to throat on which the thread is bundled up legacy to the mobile part of the piston.