Barker

Claim 1

IN A BARKING MACHINE OF THE HOLLOW HEAD TYPE IN WHICH A LOG IS FED THROUGH THE HEAD SO AS TO BE BARKED: A STATIONARY FRAME A ROTATABLE HOLLOW HEAD ROTATABLY SUPPORTED BY THE FRAME A PLURALITY OF ANGULARLY SPACED TOOL MEANS EACH INCLUDING AN ARM PIVOTALLY MOUNTED ON THE HEAD, SAID ARM EXTENDING RADIALLY INWARDLY AND HAVING ITS EFFECTIVE CENTER OF CENTRIFUGAL FORCE DISPLACED IN A REARWARD DIRECTION RELATIVELY TO THE DIRECTION OF ROTATION OF SAID HEAD FROM A RADIAL LINE BETWEEN ITS PIVOTAL MOUNTING AND THE AXIS OF ROTATION OF SAID HEAD PROVIDING PROGRESSIVELY INCREASING OUTWARDLY AS SAID TOOL MEANS IS MOVED RADIALLY OUTWARDLY AS SAID TOOL MEANS IS MOVED AWAY FROM SAID AXIS BY INTRODUCING OF LOGS OF INCREASING DIAMETER. FLUID PRESSURE MEANS INCLUDING ANNULAR PRESSURIZED CHAMBER MEANS NORMALLY CLOSED TO ANY EXTERNAL PRESSURE SOURCE HAVING WALL MEANS MOUNTED ON SAID HEAD, A PLURALITY OF ANGULARLY SPACED PRESSURE ACTUATED MEANS EACH INCLUDING A FLUID DIAPHRAGM SPRING MOUNTED ON SAID WALL MEANS AND HAVING ITS MOVABLE ELEMENT CONNECTED TO A SAID ARM AT A POINT NORMALLY URGING SAID TOOL MEANS TOWARD SAID AXIS, THE VOLUME SIZE OF THE FLUID ACTUATED MEANS AND THE ANNULAR CHAMBER BEING RELATED SO THAT THE VOLUME BETWEEN THE DISPLACED POSITIONS OF SAID PRESSURE ACTUATED MEANS IS NOT MORE THAN ABOUT ONE FIFTH OF THE VOLUME OF SAID ANNULAR CHAMBER PROVIDING A PROGRESSIVELY INCREASING FLUID FORCE AS SAID ARMS ARE MOVED RADIALLY OUTWARDLY THROUGHOUT THE RANGE OF LOG DIAMETER, THE PROGRESSIVE INCREASE OF SAID FLUID FORCE BEING IN EXCESS OF AND OPPOSITE TO THE PROGRESSIVE INCREASES IN CENTRIFUGAL FORCE CREATED UPON OUTWARD MOVEMENT OF SAID ARM TO MODIFY THE BARKING FORCE TO ESTABLISH A GENERALLY UNIFORM PREDETERMINED RELATIONSHIP BETWEEN BARKING FORCE AND LOG DIAMETER PROVIDING A GENERALLY UNIFORM BARKING FORCE WITH INCREASING LOG DIAMETER.