Panelboard including rotatable locking bar passing through slot in circuit breaker assemblies tor preventing unauthorized removal of assemblies from panelboard

Claim 1

AN ELECTRICAL PANELBOARD COMPRISING: (A) A SUPPORTING BASE; (B) A PAIR OF PARALLEL BUS BARS CARRIED BY SAID SUPPORTING BASE; (C) A PLURALITY OF CIRCUIT BREAKER ASSEMBLIES ADAPTED TO BE MOUNTED IN A ROW IN SUPERIMPOSED RELATION TO SAID BUS BARS, EACH OF SAID CIRCUIT BREAKER ASSEMBLIES COMPRISING AT LEAST TWO CIRCUIT CONTROL DEVICES AND MEANS FOR CONNECTING SAID CIRCUIT CONTROL DEVICES TO SAID BUS BARS RESPECTIVELY; (D) AN ELONGATED LOCKING BAR ROTATABLY MOUNTED ON SAID BASE AND EXTENDING BETWEEN AND PARALLEL TO SAID BUS BARS; (E) EACH OF SAID CIRCUIT BREAKER ASSEMBLIES HAVING A SLOT IN THE PORTION THEREOF ADJACENT SAID SUPPORTING BASE DISPOSED AND ARRANGED TO RECEIVE SAID LOCKING BAR, SAID SLOT HAVING A RELATIVELY NARROW ENTRANCE PORTION AND A RELATIVELY WIDE INNER PORTION; (F) SAID LOCKING BAR HAVING A NON-CIRCULAR CROSS-SECTION HAVING A MINOR DIMENSION IN A FIRST DIRECTION AND A MAJOR DIMENSION IN A SECOND DIRECTION AT RIGHT ANGLES TO SAID FIRST DIRECTION; (G) SAID LOCKING BAR BEING ROTATABLE BETWEEN A NONLOCKING POSITION IN WHICH SAID MAJOR DIMENSION EXTENDS PARALLEL TO SAID ENTRANCE PORTION OF SAID SLOT AND PERMITS INSERTION AND REMOVAL OF SAID CIRCUIT BREAKERS AND A LOCKING POSITION IN WHICH SAID MAJOR DIMENSION EXTENDS TRANSVERSELY OF SAID ENTRANCE PORTION OF SAID SLOT AND PREVENTS INSERTION AND REMOVAL OF SAID CIRCUIT BREAKERS, AND (H) RELEASEABLE LOCKING MEANS NORMALLY PREVENTING ROTATION OF SAID LOCKING BAR FROM SAID LOCKING TO SAID NON-LOCKING POSITION.