Fuel elements adjusting devices in nuclear reactor

Claim 1

IN A NUCLEAR REACTOR HAVING A HORIZONTAL REGULAR LATTICE AND HAVING FUEL ELEMENTS LOCATED IN SPACED RELATIONSHIP AT THE APICES OF THE LATTICE, A FIRST SET OF GUIDE BARS PARALLEL TO A PREDETERMINED DIRECTION, EACH OF SAID FIRST GUIDE BARS COMPRISING TWO FIRST PARTS PARALLEL TO SAID DIRECTION, SAID PARTS DEFINING FIRST VERTICAL SPACES THEREBETWEEN, A SECOND SET OF GUIDE BARS PARALLEL TO A DIRECTION TRANSVERSE TO SAID PREDETERMINED DIRECTION, EACH OF SAID SECOND GUIDE BARS COMPRISING TWO SECOND PARTS PARALLEL TO SAID TRANSVERSE DIRECTION, SAID TWO SECOND PARTS DEFINING SECOND VERTICAL SPACES THEREBETWEEN, FIRST MECHANICAL LINKAGE MEANS INTERCONNECTING SAID FIRST GUIDE BARS FOR SIMULTANEOUSLY CHANGING THE DISTANCE BETWEEN SAID FIRST BARS WHILE MAINTAINING A CONSTANT RATIO BETWEEN SAID FIRST SPACES, SECOND MECHANICAL LINKAGE MEANS INTERCONNECTING SAID SECOND GUIDE BARS FOR SIMULTANEOUSLY CHANGING THE DISTANCE BETWEEN SAID SECOND GUIDE BARS WHILE MAINTAINING A CONSTANT RATIO BETWEEN SAID SECOND SPACES, AND A PLURALITY OF CARRIAGES EACH RECEIVING ONE OF THE FUEL ELEMENTS, EACH OF SAID CARRIAGES BEING SLIDABLY SUPPORTED BY A BAR OF ONE OF SAID SETS FOR MOVEMENT ALONG SAID BAR AND EACH OF SAID CARRIAGES PROJECTING INTO THE SPACE OF AN ADJACENT BAR OF THE OTHER OF SAID SETS FOR MOVEMENT ALONG SAID SPACE.