Expansion chamber for liquid cooled electrical apparatus

Claim 1

A MAGNETIC ASSEMBLY COMPRISING, IN COMBINATION, AN ENCLOSURE, A COIL AND CORE ASSEMBLY IN SAID ENCLOSURE, A HEAT CONDUCTING AND ELECTRICALLY INSULATING LIQUID MEDIUM COMPLETELY FILLING SAID ENCLOSURE AND DIRECTLY ENGAGING THE INNER SURFACES OF SAID ENCLOSURE, AND CHAMBER MEANS POSITIONED WITHIN SAID ENCLOSURE INCLUDING A GENERALLY HOLLOW BODY WHICH INCLUDES, WITH RESPECT TO THE LIQUID LEVEL IN SAID ENCLOSURE, AN UPPER PORTION SPACED FROM THE UPPER INNER SURFACE OF SAID ENCLOSURE AND CLOSED TO THE INTERIOR OF SAID ENCLOSURE AND A LOWER PORTION OPEN TO SAID ENCLOSURE INTERIOR FOR TRANSFERRING SAID LIQUID MEDIUM BETWEEN SAID CHAMBER MEANS AND SAID ENCLOSURE INTERIOR IN RESPONSE TO EXPANSION AND CONTRACTION OF SAID LIQUID MEDIUM DURING OPERATION OF SAID MAGNETIC ASSEMBLY, SAID CHAMBER MEANS RECEIVING SAID LIQUID MEDIUM FROM SAID ENCLOSURE INTERIOR UPON EXPANSION OF SAID LIQUID MEDIUM AND SUPPLYING SAID MEDIUM TO SAID ENCLOSURE INTERIOR TO COMPENSATE FOR CONTRACTION OF SAID LIQUID MEDIUM SO THAT SAID ENCLOSURE INTERIOR REMAINS COMPLETELY FILLED AND DIRECT ENGAGEMENT OF SAID LIQUID MEDIUM WITH SAID UPPER ENCLOSURE SURFACE IS MAINTAINED DURING OPERATION OF SAID MAGNETIC ASSEMBLY.