Rotatable constant ratio transformer

Claim 1

THE COMBINATION WITH A SYNCHRO MACHINE HAVING A ROTOR WINDING AND STATOR WINDING, OF ROTARY TRANSFORMER HAVING A SECONDARY WINDING DIRECTLY CONNECTED TO SAID ROTOR WINDING AND HAVING A PRIMARY WINDING DISPOSED WITHIN A COMMON HOUSING STRUCTURE, SAID ROTARY TRANSFORMER BEING CHARACTERIZED BY THE PROVISION OF A ROTATABLE ANNULAR CORE MEMBER HAVING TWO OUTWARDLY EXTENDING LEGS BETWEEN WHICH THE SECONDARY WINDING OF THE ROTARY TRANSFORMER IS DISPOSED AND BY THE PROVISION OF CORE STRUCTURE FOR THE PRIMARY WINDING HAVING TWO L-SHAPED PORTIONS, THE FIRST OF WHICH HAS A PART WHICH EXTENDS RADIALLY FOR COOPERATION WITH ONE LEG MEMBER OF THE CORE STRUCTURE OF SAID SECONDARY WINDING AND ANOTHER PART WHICH EXTENDS AXIALLY OF THE MOTOR, THE SECOND OF SAID L-SHAPED PORTIONS HAVING A PART WHICH EXTENDS RADIALLY, SAID LAST-NAMED PART FORMING AND END CAP FOR THE SYNCHRO MACHINE AND BEING PRESSED TIGHTLY INTO ENGAGEMENT WITH SAID AXIALLY EXTENDING PORITON OF THE FIRST-MENTIONED L-SHAPED PORTION, SAID SECOND OF SAID L-SHAPED PORTIONS HAVING AN INWARDLY EXTENDING AXIAL PORTION EXTENDING INTO COOPERATION WITH THE SECOND OF SAID OUTWARDLY EXTENDING LEGS, THEREBY TO PROVIDE AN ENLARGED VOLUME WITHIN WHICH SAID SECONDARY WINDING MAY BE DISPOSED, THE INCREASED AMOUNT OF COPPER AVAILABLE FOR SAID PRIMARY WINDING REDUCING THE COPPER LOSSES THEREOF.