Multipole circuit interrupting device having a removable fuse unit with a common unitary tripping bar

Claim 1

A MULTI-POLE CIRCUIT INTERRUPTING DEVICE COMPRISING IN COMBINATION, A CIRCUIT BREAKER COMPRISING A FIRST HOUSING, A MULTI-POLE CIRCUIT BREAKER MECHANISM DISPOSED GENERALLY WITHIN SAID FIRST HOUSING AND COMPRISING SEPARABLE CONTACT MEANS FOR EACH POLE, A REMOVABLE MULTI-POLE TRIP UNIT COMPRISING A SECOND HOUSING AND A TRIP UNIT MECHANISM DISPOSED GENERALLY WITHIN SAID SECOND HOUSING, SAID TRIP UNIT MECHANISM COMPRISING A TRIP DEVICE FOR EACH POLE AND A TRIP BAR COMMON TO ALL OF SAID POLES, SAID TRIP BAR BEING MOVABLE TO OPEN ALL OF SAID CONTACT MEANS, A FIRST MEMBER MOUNTED ON SAID TRIP UNIT AND EXTENDING OUT FROM SAID SECOND HOUSING, A SECOND MEMBER MOUNTED ON SAID TRIP UNIT AND EXTENDING OUT FROM SAID SECOND HOUSING, A MULTI-POLE FUSE UNIT SUPPORTED ADJACENT SAID TRIP UNIT, SAID FUSE UNIT COMPRISING A THIRD HOUSING, FUSE UNIT MEANS SUPPORTED ON SAID THIRD HOUSING AND COMPRISING A FUSE FOR EACH POLE OF SAID CIRCUIT BREAKER AND A COMMON TRIPPING BAR STRUCTURE, EACH OF SAID FUSES COMPRISING MEANS OPERABLE UPON THE OCCURRENCE OF CERTAIN CURRENT CONDITIONS TO MOVE SAID COMMON TRIPPING BAR STRUCTURE TO THEREBY MOVE SAID FIRST MEMBER TO MOVE SAID TRIP BAR TO OPEN ALL OF SAID CONTACT MEANS, CONNECTING MEANS REMOVABLY CONNECTING SAID FUSE UNIT TO SAID CIRCUIT BREAKER, SAID CONNECTING MEANS COMPRISING PLUG-IN TYPE TERMINAL MEANS CONNECTING SAID FUSE IN ELECTRICAL SERIES WITH SAID CONTACTS, SAID FUSE UNIT BEING REMOVED BY REMOVAL OF SAID THIRD HOUSING DURING WHICH REMOVAL SAID PLUG-IN TYPE TERMINAL MEANS IS AUTOMATICALLY DISCONNECTED AND DURING WHICH REMOVAL SAID FUSES WHICH ARE SUPPORTED ON SAID THIRD HOUSING AND SAID COMMON TRIPPING BAR STRUCTURE WHICH IS SUPPORTED ON SAID THIRD HOUSING ARE REMOVED WITH SAID HOUSING, SAID FUSE UNIT COMPRISING FIXED MEANS ON SAID THIRD HOUSING HOLDING SAID SECOND MEMBER IN INOPERATIVE POSITION WHEN SAID FUSE UNIT IS MOUNTED ON SAID CIRCUIT BREAKER, UPON REMOVAL OF SAID FUSE UNIT SAID SECOND MEMBER BEING RELEASED BY SAID FIXED MEMBER ON SAID THIRD HOUSING WHEREUPON SAID SECOND MEMBER AUTOMATICALLY MOVES SAID TRIP BAR TO OPEN ALL OF SAID CONTACTS, AND SAID FIXED MEANS ON SAID THIRD HOUSING OPERATING TO MOVE SAID SECOND MEMBER TO AN INOPERATIVE POSITION WHEN SAID FUSE UNIT IS MOVED INTO OPERATIVE POSITION.