Head for spinning band fractionator

Claim 1

A TAKE-OFF HEAD FOR A LABORATORY FRACTIONATING COLUMN INCLUDING AN EXTERIORLY TAPERED HOLLOW BODY PORTION AND A SUPERPOSED HOLLOW CAP PORTION, A SUBSTANTIALLY PLANAR UPPER WALL ON SAID CAP, TUBULAR CONNECTOR STEM MEANS EXTENDING AXIALLY OF SAID CAP PORTION, AN INTROVERTED THERMOCOUPLE SLEEVE EXTENDING INWARDLY FROM THE UPPER WALL, A LATERALLY EXTENDING TUBULAR CHAMBER COMMUNICATING WITH SAID CAP PORTION AND CLOSED AT ITS OUTER END, ELECTROMAGNETIC CORE MEANS WITHIN SAID TUBULAR CHAMBER AND EXTENDING WITHIN SAID HEAD, A NEEDLE GUIDE WITHIN SAID HEAD AND EXTENDING INWARDLY INTO SAID TAPED BODY PORTION FROM SAID PLANAR WALL, A LATERAL PORT IN SAID GUIDE AT THE UPPER END THEREOF IN ALIGNMENT WITH SAID TUBER CHAMBER, SAID PORT ACCOMMODATING AN END OF SAID CORE MEANS, A NEEDLE VALVE MEANS EXTENDING WITHIN SAID TAPERED BODY PORTION AND HAVING AN UPPER END DISPOSED ADJACENT THE INNER END OF SAID CORE WITHIN SAID INTROVERTED NEEDLE GUIDE, AND PARAMAGNETIC MEANS ON THE UPPER END OF SAID VALVE MEANS.