Controlling mechanisms for the tools in a log debarking machine

Claim 1

A DEBARKING MACHINE OF THE HOLLOW-HEAD TYPE INCLUDING A STATOR, A ROTOR JOURNALLED IN THE STATOR HAVING A CENTRAL OPENING THROUGH WHICH LOGS TO BE DEBARKED ARE PASSED, A PLURALITY OF SHAFTS JOURNALLED AXIALLY IN SAID ROTOR, A BARK-REMOVING TOOL CARRIED BY THE ROTOR AND MOUNTED FOR MOVEMENT TOWARD AND AWAY FROM THE AXIS OF THE OPENING, A CRANK FIXED TO EACH SHAFT, FIXED MEMBERS ON THE ROTOR RESPECTIVELY SPACED FROM EACH CRANK IN THE DIRECTION OF MOVEMENT THEREOF, RESILIENT MEANS CONNECTED BETWEEN EACH CRANK AND ASSOCIATED FIXED MEMBER TO CAUSE THE ASSOCIATED TOOL TO SWING INWARDLY TO RESILIENTLY ENGAGE THE SURFACE OF A LOG FED THROUGH THE ROTOR, HYDRAULIC PRESSURE OPERATED CYLINDERS MOUNTED ON THE ROTOR AND A MOVABLE PISTON IN EACH CYLINDER ADAPTED, WHEN MOVED, TO ENGAGE ONE CRANK IN OPPOSITION TO THE ACTION OF SAID RESILIENT MEANS, A HYDRAULIC PRESSURE ACCUMULATOR, A SUPPLYING CONDUIT FROM THE ACCUMULATOR TO THE CYLINDER INCLUDING A NORMALLY-CLOSED SOLENOID OPERATED VALVE AND A NON-RETURN VALVE OPENING TOWARDS THE CYLINDER, A RETURN CONDUIT FROM THE CYLINDER TO THE ACCUMULATOR INCLUDING A NORMALLY-OPEN SOLENOID OPERATED VALVE AND A NON-RETURN VALVE OPENING TOWARDS THE ACCUMULATOR AND A STATIONARY SWITCH CONNECTED IN THE CIRCUIT WITH THE SOLENOID AND ADAPTED, WHEN OPERATED, TO REVERSE SAID SOLENOID VALVES, WHEREBY THE PISTONS OF THE CYLINDERS ARE OPERATED TO SERVE AS BLOCKING MEMBERS.