Positioning control system and apparatus

Claim 1

A CONTROL SYSTEM FOR EFFECTING MOVEMENT OF ASSOCIATED APPARATUS TO SELECTED POSITIONS COMPRISING, MEANS FORMING A CHAMBER AND INCLUDING A PLURALITY OF PORTS DISPOSED ALONG ITS LENGTH, MOVABLE MEANS WITHIN AND DIVIDING SAID CHAMBER INTO SEPARATE COMPARTMENTS, MEANS OPERATIVELY INTERCONNECTING SAID MOVABLE MEANS WITH THE APPARATUS TO BE MOVED, MEANS FOR EFFECTING EQUAL FLUID PRESSURES OF A MEDIUM ACROSS SAID MOVABLE MEANS WHEREBY IT IS HELD IMMOBILE, MEANS TO EFFECT A PRESSURE DIFFERENTIAL ACROSS SAID MOVABLE MEANS WHEREBY GREATER PRESSURE ON ONE SIDE WILL CAUSE THE MOVABLE MEANS TO MOVE IN THE DIRECTION OF LEAST PRESSURE, SAID PRESSURE DIFFERENTIAL MEANS DEFINING FIRST PASSAGEWAYS ARRANGED IN GROUPS FOR CONVEYING THE MEDIUM FROM THE CHAMBER THROUGH SELECTED ONES OF SAID FIRST PASSAGEWAYS, A PLURALITY OF SECOND PASSAGEWAYS, EACH ASSOCIATED WITH A GROUP OF SAID FIRST PASSAGEWAYS, DIAPHRAGM MEANS INTERPOSED BETWEEN SAID FIRST AND SECOND PASSAGEWAYS AND ACTUATABLE TO BLOCK THE FLOW OF THE MEDIUM THROUGH SAID FIRST PASSAGEWAYS, AND MEANS FOR SELECTIVELY VARYING THE PRESSURE IN ONES OF SAID SECOND PASSAGEWAYS TO THEREBY ACTUATE SAID DIAPHRAGM MEANS TO BLOCK THE FLOW OF THE MEDIUM IN ONES OF SAID FIRST PASSAGEWAYS TO THEREBY ENABLE SAID MEDIUM TO FLOW THROUGH OTHERS OF SAID FIRST PASSAGEWAYS.