Cutting machine load control

Claim 1

IN AN AUTOMATIC CONTROL FOR CUTTING APPARATUS HAVING A CUTTING MEMBER, AN ELECTRICALLY ENERGIZABLE MOTOR FOR DRIVING SAID CUTTING MEMBER, ADVANCING MEANS FOR ADVANCING SAID CUTTING MEMBER TO EFFECT A CUTTING OPERATION, STOP MEANS FOR SAID ADVANCING MEANS OPERABLE TO STOP THE ADVANCE THEREOF, SENSING MEANS EFFECTIVE TO SENSE THE LOAD EXERTED ON SAID CUTTING MEMBER DURING OPERATION THEREOF AND INCLUDING AN ELECTROMAGNET CONNECTED IN SERIES WITH SAID MOTOR AND ENERGIZED AT MOTOR CURRENT DURING OPERATION OF SAID MOTOR, AND MEANS OPERABLE IN RESPONSE TO SAID SENSING MEANS TO ACTUATE SAID STOP MEANS TO A PREDETERMINED TIME INTERVAL FOLLOWING THE SENSING OF AN OVERLOAD ABOVE A PREDETERMINED LOAD, WHICH TIME INTERVAL IS INVERSELY PROPORTIONAL TO THE OVERLOAD, COMPRISING A SWITCH OPERABLE TO ACTUATE SAID STOP MEANS, AN ARMATURE MOVABLE TO CLOSE SAID SWITCH UPON A PREDETERMINED OVERLAOD ON SAID MOTOR, AND TIME DELAY MEANS RETARDING MOVEMENT OF SAID ARMATURE TO CLOSE SAID SWITCH AND CONTROLLING MOVEMENT OF SAID ARMATURE TO EFFECT THE CLOSING OF SAID SWITCH ONLY UPON SUSTAINED OVERLOAD CONDITIONS.