Lateral offset mounting for power shovel dipper arm

Claim 1

POWER SHOVEL ADAPTED TO OPERATE UNDER LATERALLY OFFSET CONDITIONS, MOUNTED ON SWIVELLING PLATFORM, PROVIDED WITH A BRACKET AND ADAPTED, DURING THE SHOVELLING WORK, TO AVOID THE DEVELOPMENT OF OBLIQUE REACTIONS ON INTERMEDIATE MEMBERS DISPOSED BETWEEN SAID BUCKET AND SAID PLATFORM, SAID POWER SHOVEL COMPRISING A JIB HAVING A SUPPORTED END CARRIED BY SAID PLATFORM ON THE SWIVEL AXIS OF SAID PLATFORM AND A HEAD ADAPTED ON DESCRIBE A HORIZONTAL CIRCLE ABOUT SAID SWIVEL AXIS, A PIVOT PIN CARRIED BY SAID HEAD AND HAVING ITS AXIS SUBSTANTIALLY PARALLEL TO THE SWIVEL AXIS OF SAID PLATFORM, A SUPPORT MOUNTED FOR FREE ROTATION ON SAID PIVOT PIN CARRIED BY SAID JIB HEAD, A CRANK ARM EXTENDING LATERALLY FROM, AND RIGID WITH, SAID SUPPORT, A FIRST HYDRAULIC ACTUATOR HAVING A BEARING END LATERALLY PIVOTED ON SAID JIB AND A WORKING END PIVOTED ON SAID CRANK ARM FOR CONTROLLING THE PIVOTAL MOVEMENTS OF SAID SUPPORT IN RELATION TO SAID JIB, ANOTHER PIVOT PIN MOUNTED ON SAID SUPPORT AND HAVING ITS AXIS DISPOSED AT RIGHT ANGLES TO THE PIVOT AXIS OF SAID SUPPORT, A DIPPER ARM FULCRUMED ON SAID OTHER PIVOT PIN, A SECOND HYDRAULID ACTUATOR HAVING A BEARING END PIVOTED ON SAID SUPPORT AND WORKING END PIVOTED ON ONE END OF SAID DIPPER ARM, FOR CONTROLLING THE ANGULAR MOVEMENTS OF SAID DIPPER ARM IN RELATION TO SAID SUPPORT ABOUT SAID OTHER PIVOT PIN, A BUCKET MOUNTED ON THE OPPOSITE END OF SAID DIPPER ARM, AND A THIRD HYDRAULIC ACTUATOR HAVING A BEARING END PIVOTED ON SAID DIPPER ARM AND A WORKING END PIVOTED ON SAID BUCKET FOR CONTROLLING THE PIVOTAL MOVEMENTS OF SAID BUCKETS IN RELATION TO SAID DIPPER ARM.