Apparatus for the transverse severance of continuously moving tubular structures

Claim 1

AN APPARATUS FOR THE SUCCESSIVE SEVERANCE OF LENGTHS FROM A CONTINUOUSLY AXIALLY ADVANCED TUBULAR STRUCTURE COMPRISING: A POLYPHASE INDUCTION MOTOR MOUNTED WITH ITS ROTOR SHAFT IN SPACED PARALLEL RELATION TO THE PATH OF ADVANCE OF THE STRUCTURE, SAID MOTOR HAVING AN INTERNAL BRAKE RELEASED AND APPLIED WHEN THE MOTOR IS RESPECTIVELY ENERGIZED AND DEENERGIZED, A KNIFE BLADE SECURED TO AND EXTENDING OUTWARDLY FROM SAID SHAFT SUBSTANTIALLY IN A RADIAL PLANE TO DESCRIBE A CIRCULAR PATH THROUGH THE PATH OF THE TUBING, MEANS INCLUDING A TUBE END-SENSING ELEMENT SPACED IN THE DIRECTION OF TUBE ADVANCE AWAY FROM THE BLADE PATH, SAID MEANS BEING ADAPTED TO INITIATE A MOTOR STARTING SIGNAL UPON SENSING OF THE TUBE END ADVANCED TO SAID ELEMENT, SAID MOTOR BEING ADAPTED TO ACCELERATE FROM AN INITIAL STOPPED POSITION IN ABOUT ONE-THIRD OF A REVOLUTION TO A SPEED GIVING THE BLADE A HIGH LINEAR SPEED RELATIVE TO THE SPEED OF THE TUBING WHEREBY THE TUBING IS CUT SUBSTANTIALLY AT RIGHT ANGLES TO ITS AXIS, QUICK ACTING CONTROL MEANS OPERATED BY THE MOTOR SHAFT FOR DEENERGIZING THE MOTOR AND THEREBY CAUSING BRAKE APPLICATION AFTER THE SHAFT HAS ROTATED A FURTHER FRACTION OF A REVOLUTION FOR TUBING CUT-OFF, THE BRAKE BEING ADAPTED TO BRING THE MOTOR TO A STANDSTILL IN THE REMAINING PART OF ONE COMPLETE REVOLUTION OF THE MOTOR, SAID CONTROL MEANS INCLUDING CAMMING MEANS DRIVEN BY THE MOTOR SHAFT, A SPRING-CLOSED QUICK ACTING BREAK SWITCH HAVING CONTACTS SWITCHING AT LEAST TWO PHASES OF THE MOTOR AND ALSO A CONTROL CIRCUIT BRANCH, SAID CAMMING MEANS BEING ADAPTED FOR OPENING THE BREAK SWITCH ONCE FOR EACH MOTOR REVOLUTION AFTER THE BLADE HAS PASSED THROUGH THE PATH OF THE ADVANCING TUBING, AND SOLENOIDALLY RELEASED DETENT LATCH MEANS FOR RETAINING THE BREAK SWITCH OPEN UPON CAM ACTUATION THEREOF, THE SOLENOID OF THE LATCH MEANS BEING OPERABLE TO RELEASE SAID BREAK SWITCH TO CLOSED POSITION A PRE-TIMED INTERVAL AFTER OPENING OF SAID CONTROL CIRCUIT BRANCH.

Claim 2

AN APPARATUS FOR THE SUCCESSIVE SEVERANCE OF LENGTHS FROM A CONTINUOUSLY AXIALLY ADVANCED TUBULAR STRUCTURE COMPRISING: A POLYPHASE INDUCTION MOTOR MOUNTED WITH ITS ROTOR SHAFT IN SPACED PARALLEL RELATION TO THE PATH OF ADVANCE OF THE STRUCTURE, SAID MOTOR HAVING AN INTERNAL BRAKE RELEASED AND APPLIED WHEN THE MOTOR IS RESPECTIVELY ENERGIZED AND DEENERGIZED, A KNIFE BLADE SECURED TO AND EXTENDING OUTWARDLY FROM SAID SHAFT SUBSTANTIALLY IN A RADIAL PLANE TO DESCRIBE A CIRCULAR PATH THROUGH THE PATH OF THE TUBING, MEANS INCLUDING A TUBE END-SENSING ELEMENT SPACED IN THE DIRECTION OF TUBE ADVANCE AWAY FROM THE BLADE PATH, SAID MEANS BEING ADAPTED TO INITIATE A MOTOR STARTING SIGNAL UPON SENSING OF THE TUBE END ADVANCED TO SAID ELEMENT, SAID MOTOR BEING ADAPTED TO ACCELERATE FROM AN INITIAL STOPPED POSITION IN ABOUT ONE-THIRD OF A REVOLUTION TO A SPEED GIVING THE BLADE A HIGH LINEAR SPEED RELATIVE TO THE SPEED OF THE TUBING WHEREBY THE TUBING IS CUT SUBSTANTIALLY AT RIGHT ANGLES TO ITS AXIS, QUICK ACTING CONTROL MEANS OPERATED BY THE MOTOR SHAFT FOR DEENERGIZING THE MOTOR AND THEREBY CAUSING BRAKE APPLICATION AFTER THE SHAFT HAS ROTATED A FURTHER FRACTION OF A REVOLUTION FOR TUBING CUT-OFF, THE BRAKE BEING ADAPTED TO BRING THE MOTOR TO A STANDSTILL IN THE REMAINING PART OF ONE COMPLETE REVOLUTION OF THE MOTOR, SAID CONTROL MEANS INCLUDING CAMMING MEANS DRIVEN BY THE MOTOR SHAFT, A SPRING-CLOSED QUICK ACTING BREAK SWITCH HAVING CONTACTS SWITCHING AT LEAST TWO PHASES OF THE MOTOR AND ALSO A CONTROL CIRCUIT BRANCH, SAID CAMMING MEANS BEING ADAPTED FOR OPENING THE BREAK SWITCH ONCE FOR EACH MOTOR REVOLUTION AFTER THE BLADE HAS PASSED THROUGH THE PATH OF THE ADVANCING TUBING, AND SOLENOIDALLY RELEASED DETENT LATCH MEANS FOR RETAINING THE BREAK SWITCH OPEN UPON CAM ACTUATION THEREOF, THE SOLENOID OF THE LATCH MEANS BEING OPERABLE TO RELEASE SAID BREAK SWITCH TO CLOSED POSITION A PRE-TIMED INTERVAL AFTER OPENING OF SAID CONTROL CIRCUIT BRANCH.