Davit arrangement for raising and lowering a drag

Claim 1

A SYSTEM FOR RAISING AND LOWERING A DRAG COMPRISING A TRUNNION, A BALL JOINT, AND A HEAD, SAID SYSTEM COMPRISING: A TRUNNION DAVIT; A BALL JOINT DAVIT; A HEAD DAVIT; SUPPORT MEANS FOR SUPPORTING ALL OF SAID DAVITS RIGIDLY WITH RESPECT TO EACH OTHER; A SUBSTANTIALLY HORIZONTAL BOOM ON EACH OF SAID DAVITS; SHEAVES AT BOTH ENDS OF EACH BOOM; A FIRST LIFTING LINE RUNNING OVER THE SHEAVES ON THE BOOM ON SAID HEAD DAVIT TO SUPPORT SAID HEAD FROM SAID HEAD DVIT, ONE END OF SAID LINE BEING FIXEDLY CONNECTED WITH RESPECT TO SAID HEAD DAVIT; A SECOND LIFTING LINE RUNNING OVER THE SHEAVES ON THE BOOM ON SAID BALL JOINT DAVIT TO SUPPORT SAID BALL JOINT FROM SAID BALL JOINT DAVIT; AND A THIRD LIFTING LINE RUNNING OVER THE SHEAVES ON THE BOOM ON SAID TRUNNION DAVIT TO SUPPORT SAID TRUNNION FROM SAID TRUNNION DAVIT, ONE END SAID THIRD LINE BEING FIXEDLY CONNECTED WITH RESPECT TO SAID TRUNNION DAVIT; A FIRST WINCH CONNECTED TO THE OTHER END OF SAID FIRST LIFTING LINE TO RAISE AND LOWER SAID HEAD; FIRST DRIVE MEANS CONNECTED TO SAID WINCH FOR DRIVING THE SAME; SECOND AND THIRD WINCHES CONNECTED, RESPECTIVELY, TO THE TWO ENDS OF SAID SECOND LINE FOR RAISING AND LOWERING SAID BALL JOINT; A FOURTH WINCH CONNECTED TO THE OTHER END OF SAID THIRD LIFTING LINE FOR RAISING AND LOWERING SAID TRUNNION; DRIVE MEANS CONNECTED TO SAID FOURTH WINCH FOR OPERATING THE SAME; A DRIVING CONNECTION BETWEEN SAID FIRST WINCH AND SAID SECOND WINCH TO DRIVE SAID SECOND WINCH SIMULTANEOUSLY WITH SAID FIRST WINCH TO WIND ONE END OF SAID SECOND LINE AT A PREDETERMINED RATE WITH RESPECT TO THE RATE AT WHICH SAID FIRST LINE IS WOUND ON SAID FIRST WINCH WHEN SAID FIRST DRIVING MEANS IS ENERGIZED, THE RELATIVE RATE OF WINDING BEING DETERMINED BY THE FRACTION OF THE LENGTH OF SAID DRAG BETWEEN SAID HEAD AND SAID BALL JOINT IN PROPORTION TO THE TOTAL LENGTH OF SAID DRAG WHEREBY SAID DRAG IS MAINTAINED SUBSTANTIALLY STRAIGHT WHILE SAID HEAD IS BEING MOVED RELATIVE TO SAID TRUNNION AND A SECOND DRIVING CONNECTION BETWEEN SAID FOURTH WINCH AND SAID THIRD WINCH TO DRIVE BOTH OF SAID WINCHES SIMULTANEOUSLY, TO WIND THE OTHER END OF SAID SECOND LINE AT A PREDETERMINED RATE WITH RESPECT TO THE RATE AT WHICH SAID THIRD LINE IS WOUND ON SAID FOURTH WINCH WHEN SAID SECOND DRIVING MEANS IS ENERGIZED, THE RELATIVE RATE OF WINDING BEING DETERMINED BY THE FRACTION OF THE LENGTH OF SAID DRAG BETWEEN SAID TRUNNION AND SAID BALL JOINT IN PROPORTION TO THE TOTAL LENGTH OF SAID DRAG WHEREBY SAID DRAG IS MAINTAINED SUBSTANTIALLY STRAIGHT WHILE SAID TRUNNION IS BEING MOVED RELATIVE TO SAID HEAD.

Claim 2

A SYSTEM FOR RAISING AND LOWERING A DRAG COMPRISING A TRUNNION, A BALL JOINT, AND A HEAD, SAID SYSTEM COMPRISING: A TRUNNION DAVIT; A BALL JOINT DAVIT; A HEAD DAVIT; SUPPORT MEANS FOR SUPPORTING ALL OF SAID DAVITS RIGIDLY WITH RESPECT TO EACH OTHER; A SUBSTANTIALLY HORIZONTAL BOOM ON EACH OF SAID DAVITS; SHEAVES AT BOTH ENDS OF EACH BOOM; A FIRST LIFTING LINE RUNNING OVER THE SHEAVES ON THE BOOM ON SAID HEAD DAVIT TO SUPPORT SAID HEAD FROM SAID HEAD DVIT, ONE END OF SAID LINE BEING FIXEDLY CONNECTED WITH RESPECT TO SAID HEAD DAVIT; A SECOND LIFTING LINE RUNNING OVER THE SHEAVES ON THE BOOM ON SAID BALL JOINT DAVIT TO SUPPORT SAID BALL JOINT FROM SAID BALL JOINT DAVIT; AND A THIRD LIFTING LINE RUNNING OVER THE SHEAVES ON THE BOOM ON SAID TRUNNION DAVIT TO SUPPORT SAID TRUNNION FROM SAID TRUNNION DAVIT, ONE END SAID THIRD LINE BEING FIXEDLY CONNECTED WITH RESPECT TO SAID TRUNNION DAVIT; A FIRST WINCH CONNECTED TO THE OTHER END OF SAID FIRST LIFTING LINE TO RAISE AND LOWER SAID HEAD; FIRST DRIVE MEANS CONNECTED TO SAID WINCH FOR DRIVING THE SAME; SECOND AND THIRD WINCHES CONNECTED, RESPECTIVELY, TO THE TWO ENDS OF SAID SECOND LINE FOR RAISING AND LOWERING SAID BALL JOINT; A FOURTH WINCH CONNECTED TO THE OTHER END OF SAID THIRD LIFTING LINE FOR RAISING AND LOWERING SAID TRUNNION; DRIVE MEANS CONNECTED TO SAID FOURTH WINCH FOR OPERATING THE SAME; A DRIVING CONNECTION BETWEEN SAID FIRST WINCH AND SAID SECOND WINCH TO DRIVE SAID SECOND WINCH SIMULTANEOUSLY WITH SAID FIRST WINCH TO WIND ONE END OF SAID SECOND LINE AT A PREDETERMINED RATE WITH RESPECT TO THE RATE AT WHICH SAID FIRST LINE IS WOUND ON SAID FIRST WINCH WHEN SAID FIRST DRIVING MEANS IS ENERGIZED, THE RELATIVE RATE OF WINDING BEING DETERMINED BY THE FRACTION OF THE LENGTH OF SAID DRAG BETWEEN SAID HEAD AND SAID BALL JOINT IN PROPORTION TO THE TOTAL LENGTH OF SAID DRAG WHEREBY SAID DRAG IS MAINTAINED SUBSTANTIALLY STRAIGHT WHILE SAID HEAD IS BEING MOVED RELATIVE TO SAID TRUNNION AND A SECOND DRIVING CONNECTION BETWEEN SAID FOURTH WINCH AND SAID THIRD WINCH TO DRIVE BOTH OF SAID WINCHES SIMULTANEOUSLY, TO WIND THE OTHER END OF SAID SECOND LINE AT A PREDETERMINED RATE WITH RESPECT TO THE RATE AT WHICH SAID THIRD LINE IS WOUND ON SAID FOURTH WINCH WHEN SAID SECOND DRIVING MEANS IS ENERGIZED, THE RELATIVE RATE OF WINDING BEING DETERMINED BY THE FRACTION OF THE LENGTH OF SAID DRAG BETWEEN SAID TRUNNION AND SAID BALL JOINT IN PROPORTION TO THE TOTAL LENGTH OF SAID DRAG WHEREBY SAID DRAG IS MAINTAINED SUBSTANTIALLY STRAIGHT WHILE SAID TRUNNION IS BEING MOVED RELATIVE TO SAID HEAD.