Two-way plow with disks for coulters and moldboards

Claim 1

A TWO-WAY MOLDBOARD TYPE PLOW COMPRISING A FRAME ADAPTED TO BE CONNECTED TO A SOURCE OF MOTIVE POWER, A BEAM PIVOTALLY MOUNTED ON SAID FRAME FOR HORIZONTAL SWINGING MOVEMENT TO AND FROM RIGHT AND LEFT-HAND PLOWING POSITIONS, AT LEAST ONE SHARE SECTION FIXEDLY SECURED TO SAID BEAM, A FIRST ARM PIVOTALLY SECURED TO SAID BEAM AND HAVING A GROUND-ENGAGING DISK ROTATABLY MOUNTED THEREON, A SECOND ARM ASSOCIATED WITH SAID FIRST ARM AND RESPONSIVE TO MOVEMENT THEREOF, SAID SECOND ARM HAVING A GROUND-ENGAGING DISK ROTATABLY MOUNTED THEREON, THE DISK ON ONE OF SAID ARMS BEING RESPONSIVE TO THE UPWARD SOIL FORCE TO DISPOSE SAID DISK IN PROPER COULTER RELATION WITH RESPECT TO SAID SHARE SECTION AND TO DISPOSE THE DISK ON THE OTHER ARM IN ROTARY MOLDBOARD RELATION TO SAID SHARE SECTION, EACH ARM BEING OPERATIVELY RESPONSIVE TO THE INDEXING OF SAID BEAM FROM ONE PLOWING POSITION TO ANOTHER TO SHIFT SAID FIRST DISK FROM A COULTER POSITION TO A ROTARY MOLDBOARD POSITION AND SAID OTHER DISK FROM A ROTARY MOLDBOARD POSITION TO A COULTER POSITION, A MEANS FOR INDEXING SAID BEAM.