Slit trenching and cable laying machine

Claim 1

IN A PLOW FOR PROGRESSIVELY CUTTING A SLIT-TYPE TRENCH IN SOIL, A CHASSIS FRAME, SUPPORTING WHEELS FOR SAID FRAME, POWER MEANS FOR SUPPLYING TRACTIVE EFFORT TO SAID WHEELS, SHAFT BEARINGS CARRIED BY SAID FRAME, A SHAFT JOURNALLED IN SAID BEARINGS AND HAVING AN ECCENTRIC CAM THEREON, A VERTICALLY DISPOSED RELATIVELY THIN BLADE-LIKE PLOWSHARE HAVING A BEARING LOCATED NEAR THE UPPER END THEREOF FOR RECEIVING SAID ECCENTRIC CAM, SAID PLOWSHARE EXTENDING SUBSTANTIALLY VERTICALLY DOWNWARDLY BELOW THE BEARING AND HAVING ITS LOWER END REGION ADAPTED TO PROJECT INTO AND PROGRESSIVELY FORM A SLIT-TYPE TRENCH IN THE SOIL AS THE PLOW IS PROPELLED FORWARDLY, CONFINING MEANS FOR THE MEDIAL PORTIONS OF SAID PLOWSHARE CONSTRAINING THE SAME DURING ROTATION OF THE ECCENTRIC CAM WHEREBY THE LOWER END REGION OF THE PLOWSHARE IS CONSTRAINED TO MOVE IN AN ELLIPTICAL PATH, AND MEANS FOR ROTATING SAID SHAFT, AND A SERRATED FORWARD EDGE ON THE LOWER END OF SAID PLOWSHARE EFFECTIVE DURING UPWARD MOVEMENT OF SAID PLOWSHARE TO DRAW SAID CHASSIS FRAME DOWNWARDLY AND TO INCREASE THE TRACTIVE EFFORT OF SAID WHEELS.