Circuit breaker panel assembly with discriminating means

Claim 1

AN ELECTRIC CIRCUIT BREAKER PANELBOARD COMPRISING: (A) A GENERALLY PLANAR SUPPORTING PORTION, (B) AT LEAST ONE ROW OF RETAINING HOOKS ON SAID SUPPORTING PORTION, (C) AN ELONGATED UPSTANDING GENERALLY U-SHAPED BARRIER STRIP CARRIED BY SAID SUPPORTING PORTION ADJACENT SAID ROW OF HOOKS, SAID BARRIER STRIP HAVING A PAIR OF CLOSELY SPACED WALL PORTIONS, SAID WALL PORTIONS HAVING A PLURALITY OF ALIGNED HOLES THEREIN, (D) A KEYING STRIP REMOVABLY CARRIED BY SAID BARRIER STRIP AND RECEIVABLE BETWEEN SAID CLOSELY SPACED WALL PORTIONS, SAID KEYING STRIP INCLUDING A PLURALITY OF FINGERS EACH EXTENDING BETWEEN A PAIR OF SAID ALIGNED HOLES IN SAID WALL PORTIONS OF SAID BARRIER MEMBER WHEN SAID KEYING STRIP IS IN PLACE, (E) A PLURALITY OF ELECTRIC CIRCUIT BREAKERS EACH COMPRISING A GENERALLY RECTANGULAR INSULATING CASING HAVING A BOTTOM WALL AND A GENERALLY PERPENDICULAR END WALL, AND A RETAINING LUG ADJACENT THE CORNER OF SAID END WALL AND BOTTOM WALL, (F) AT LEAST SOME OF SAID CIRCUIT BREAKERS HAVING A BLOCKING MEMBER RIGIDLY ATTACHED TO THE CASING THEREOF AND PROJECTING BEYOND SAID END WALL IN A DIRECTION GENERALLY PARALLEL TO SAID BOTTOM WALL, (G) SAID FINGERS OF SAID KEYING STRIP BEING READILY REMOVABLE FROM SAID STRIP WHEN SAID STRIP IS OUT OF SAID BARRIER MEMBER WHEREBY TO LEAVE A CORRESPONDING PAIR OF SAID ALIGNED HOLES UNOBSTRUCTED TO PERMIT THE MOUNTING OF A CIRCUIT BREAKER AT THE CORRESPONDING MOUNTING LOCATION.