Method and apparatus for inspecting spinnerets

Claim 1

APPARATUS FOR LOCATING A CLOGGED HOLE IN A SPINNERET HAVING A CIRCULAR ARRANGEMENT OF HOLES, SAID APPARATUS COMPRISING A ROTATABLE SUPPORT FOR SUPPORTING THE SPINNERET FOR ROTATION THEREWITH ABOUT THE AXIS OF THE CIRCULAR ARRANGEMENT OF HOLES, A LIGHT SOURCE FOR DIRECTING LIGHT THROUGH THE HOLES OF THE SPINNERET, A LIGHT SENSITIVE CELL RESPONSIVE TO LIGHT FROM SAID SOURCE, A SHIELD BETWEEN SAID LIGHT SOURCE AND SAID CELL, SAID SHIELD LIMITING THE LIGHT REACHING SAID CELL TO THE LIGHT PASSING THROUGH A HOLE LOCATED IN A PRESELECTED POSITION, MEAND FOR ROTATING SAID SUPPORT AT SUBSTANTIALLY CONSTANT SPEED TO THEREBY REPEATEDLY MOVE EACH HOLE OF THE SPINNERET THROUGH SAID PRESELECTED POSITION, A CATHODE RAY OSCILLOSCOPE HAVING A VERTICAL BEAM DEFLECTING CIRCUIT AND A TRIGGERABLE HORIZONTAL SWEEP CIRCUIT, MEANS CONNECTING SAID LIGHT SENSITIVE CELL TO THE VERTICAL BEAM DEFLECTING CIRCUIT OF SAID OSCILLOSCOPE WHEREBY SAID CELL ACTIVATES THE VERTICAL BEAM DEFLECTING CIRCUIT WHEN AN ENCLOGGED HOLE PASSES THROUGH SAID PRESELECTED POSITION AND IS INEFFECTIVE WHEN A COMPLETELY CLOGGED HOLE PASSESS THROUGH SAID PRESELECTED POSITION, A FIRST ELECTRICAL CONTACT ON SAID ROTATABLE SUPORT, A SECOND ELECTRICAL CONTACT ARRANGED TO BE ENGAGED BY SAID FIRST CONTACT ONCE DURING EACH REVOLUTION OF SAID SUPPORT, A POWERED CIRCUIT INCLUDING SAID ELECTRICAL CONTACTS CONNECTED TO SAID OSCILLOSCOPE TO TRIGGER THE HORIZONTAL SWEEP CIRCUIT THEREOF EACH TIME SAID CONTACTS ENGAGE WHEREBY THE HORIZONTAL STARTING POSITION OF THE BEAM OF THE OSCILLOSCOPE IS DETERMINED BY THE HOLE WHICH IS IN SAID PRESELECTED POSITION AT THE TIME SAID CONTACTS ENGAGE ONE ANOTHER, MEANS MOUNTING SAID SECOND ELECTRICAL CONTACT FOR MANUAL ROTATION ABOUT THE AXIS OF SAID ROTATABLE SUPPORT WHEREBY SAID CONTACTS MAY BE CAUSED TO ENGAGE AT THE TIME A CLOGGED HOLE IS IN THE PRESELECTED POSITION, AND MEANS FOR INDICATING THE ROTARY POSITION OF THE CLOGGED HOLE IN RELATION TO SAID PRESELECTED POSITION.