Racking mechanism for earth boring equipment

Claim 1

IN COMBINATION, A DERRICK; A LIFT MECHANISM MOUNTED IN THE DERRICK TO BE RAISED AND LOWERED IN A VERTICAL PATH, PIPE GRIPPING MEANS ON THE LIFT MECHANISM TO ENGAGE AND SUPPORT A STRING OF PIPE LENGTHS IN AN UPRIGHT DISPOSITION, MEANS FOR OPERATING THE LIFT MECHANISM AND THE PIPE GRIP PING MEANS, TO RUN IN AND PULL THE PIPE STRING FROM AND TO AN ELEVATED UPRIGHT POSITION OVER THE GROUND, RESPECTIVELY; A JOINER MECHANISM MOUNTED ON AND RAISED AND LOWERED WITH THE LIFT MECHANISM, TO ATTACH AND DETACH THE PIPE LENGTHS TO AND FROM THE PIPE STRING, MEANS FOR OPERATING THE JOINER MECHANISM, TO ADD AND REMOVE PIPE LENGHTS TO AND FROM THE STRING IN THE ELEVATED POSITION; A FIRST PIPE TRANSPORT MECHANISM MOUNTED ON AND RAISED AND LOWERED WITH THE LIFT MECHANISM, TO BE MOVED BACK AND FORTH IN A TRANSVERSE PATH ADJACENT THE ELEVATED POSITION, A SECOND PIPE GRIPPING MEANS ON THE PIPE TRANSPORT MECHANISM TO ENGAGE AND SUPPORT A PIPE LENGHT IN AN UPRIGHT DISPOSITION, MEANS FOR OPERATING THE PIPE TRANSPORT MECHANISM AND THE SECOND PIPE GRIPPING MEANS, TO FEED IN AND WITHDRAW THE PIPE LENGTHS FROM AND TO AN OUTLYING UPRIGHT POSITION OFFSET FROM THE STRING, RESPECTIVELY; A SECOND PIPE TRANSPORT MECHANISM PIVOTALLY MOUNTED ADJACENT ONE SIDE OF THE DERRICK, TO BE SWUNG UP AND DOWN IN A VERTICAL PLANE ADJACENT THE OUTLYING POSITION, THIRD PIPE GRIPPING MEANS ON THE SECOND PIPE TRANSPORT MECHANISM TO ENGAGE AND SUPPORT A PIPE LENGTH IN AN UPRIGHT DISPOSITION, AND MEANS FOR OPERATING THE SECOND PIPE TRANSPORT MECHANISM AND THE THIRD PIPE GRIPPING MEANS, TO FEED UP AND LOWER THE PIPE LENGTHS FROM AND TO A SUBSTANTIALLY HORIZONTAL HANDLING POSITION ON THE SIDE OF THE DERRICK, RESPECTIVELY.