Integral selector switch and transfer switch unit for tapped regulating transformers

Claim 1

A SWITCHING SYSTEM FOR TAP-CHANGING REGULATING TRANSFORMERS COMPRISING IN COMBINATION: (A) A SELECTOR SWITCH HAVING A HOLLOW CENTRALLY ARRANGES INSULATING COLUMN SUPPORTING ON THE OUTSIDE THEREOF A PAIR OF ANNULAR FIXED CONTACTS, TAP CONTACTS CIRCULARLY ARRANGED AROUND EACH OF SAID PAIR OF ANNULAR CONTACTS AND PIVOTABLE CONTACT ARMS FOR CONDUCTIVELY CONNECTING EACH OF SAID TAP CONTACTS TO ONE OF SAID PAIR OF ANNULAR CONTACTS; (B) A TRANSFER SWITCH INSIDE OF A CYLINDRICAL HOUSING ARRANGED ABOVE SAID SELECTOR SWITCH, SAID TRANSFER SWITCH HAVING CIRCULARLY ARRANGED FIXED CONTACTS, COOPERATING RADIALLY MOVABLE CONTACTS, CONTACT OPERATING MEANS FOR CAUSING RELATIVE MOVEMENT OF SAID FIXED CONTACTS AND SAID MOVABLE CONTACTS IN A PREDETERMINED SEQUENCE, AN OPERATING SHAFT FOR OPERATING SAID MOVABLE CONTACTS EXTENDING ALONG THE AXIS OF SAID HOUSING, AND SAID TRANSFER SWITCH FURTHER INCLUDING A FIXED FRAME STRUCTURE INSIDE SAID HOUSING SUPPORTING SAID FIXED CONTACTS, SAID MOVABLE CONTACTS AND SAID CONTACT-OPERATING MEANS; (C) MEANS OF INSULATING MATERIAL DEFINING A VERTICAL DUCT, SAID DUCT DEFINING MEANS BEING ARRANGED IN SIDE OF SAID HOUSING IN COAXIAL RELATION THERETO AND BELOW SAID FIXED CONTACTS, MOVABLE CONTACTS AND SAID CONTACT-OPERATING MEANS OF SAID TRANSFER SWITCH AND INTEGRAL WITH SAID FIXED FRAME STRUCTURE THEREOF; (D) CLOSING MEANS FOR THE UPPER END OF SAID INSULATING COLUMN OF SAID SELECTOR SWITCH; AND (E) MEANS CONDUCTIVELY CONNECTING SAID PAIR OF ANNULAR CONTACTS OF SAID SELECTOR SWITCH AND SAID FIXED CONTACTS OF SAID TRANSFER SWITCH, SAID CONNECTING MEANS INCLUDING PLUG CONTACT MEANS HAVING ENDS INSIDE OF SAID INSULATING COLUMN AND PROJECTING UPWARDLY ACROSS SAID CLOSING MEANS INTO SAID DUCT, AND SAID CONNECTING MEANS FURTHER INCLUDING SOCKET CONTACT MEANS ARRANGED INSIDE SAID DUCT, SUPPORTED BY SAID DUCT DEFINING MEANS AND COOPERATIVELY ENGAGED BY SAID PLUG CONTACT MEANS.