Load control for cutting apparatus

Claim 1

IN AN AUTOMATIC CONTROL FOR CUTTING APPARATUS AND THE LIKE, A MOTOR, A CUTTING MEMBER, MEANS DRIVEN BY SAID MOTOR FOR DRIVING SAID CUTTING MEMBER, FEEDING MEANS FOR ADVANCING SAID CUTTING MEMBER TO EFFECT A CUTTING OPERATION, ELECTRICALLY ENERGIZABLE STOP MEANS STOPPING OPERATION OF SAID FEEDING MEANS AND THE ADVANCE OF SAID CUTTING MEMBER UPON OVERLOAD OF SAID MOTOR, AN ENERGIZING CIRCUIT FOR SAID ELECTRICALLY ENERGIZABLE STOP MEANS INCLUDING AN OVERLOAD RELAY HAVING A SWITCH IN SAID ENERGIZING CIRCUIT, A SERIES COIL CONNECTED IN SERIES WITH SAID MOTOR, AN ARMATURE MOVABLE ALONG SAID SERIES COIL AND OPERABLE TO CLOSE SAID SWITCH UPON A PREDETERMINED LOAD ON SAID MOTOR AND COIL, A SHUNT COIL ENCIRCLING SAID ARMATURE AND WOUND REVERSELY OF SAID SERIES COIL AND ENERGIZED THROUGH THE ENERGIZING CIRCUIT TO SAID ELECTRICALLY ENERGIZABLE STOP MEANS UPON THE CLOSING OF SAID SWITCH, SAID SHUNT COIL OPPOSING SAID SERIES COIL UPON THE CLOSING OF SAID SWITCH AND THE ENERGIZATION OF SAID ELECTRICALLY ENERGIZABLE STOP MEANS AND RAISING THE CURRENT VALUE AT WHICH SAID ARMATURE WILL MOVE TO ITS INOPERATIVE POSITION, ABOVE THE NO LOAD CURRENT VALUE OF SAID MOTOR AND THEREBY ENABLING SAID SWITCH TO OPEN AND EFFECT THE CONTINUED OPERATION OF SAID FEEDING MEANS AT A HIGHER CURRENT VALUE THAN THE CURRENT VALUE FOR EFFECTING OPENING OF SAID SWITCH BY THE SERIES COIL ALONE.