Panelboard for bolted and plug-in circuit breaker

Claim 1

A PANELBOARD INCLUDING A FIRST AND A SECOND MOUNTING LEDGE PARALLEL TO EACH OTHER AND SPACED APART A DISTANCE SUFFICIENT TO PERMIT MOUNTING OF TWO BOLTED CIRCUIT BREAKERS IN END TO END RELATIONSHIP WITH EACH OF THESE CIRCUIT BREAKERS HAVING A LINE TERMINAL WHICH PROJECTS BEYOND AN END OF THE CIRCUIT BREAKER HOUSING, A PLURALITY OF SPACED ELONGATED BUS BARS POSITIONED BETWEEN SAID LEDGES AND EXTENDING GENERALLY PARALLEL THERETO, AN INSULATING BLOCK HAVING GROOVES IN A BACK SURFACE THEREOF THROUGH WHICH SAID BUS BARS EXTEND, A PLURALITY OF STRAPS HAVING RIGID PORTIONS EXTENDING INTO RECESSES OF SAID BLOCK IN A FRONTT SURFACE THEREOF, FIRST MEANS ENGAGING SAID RIGID PORTIONS AND ELECTRICALLY CONNECTING EACH OF SAID STRAPS TO ONE OF SAID BUS BARS, EACH OF SAID STRAPS ALSO HAVING ANOTHER PORTION CONSTRUCTED TO HAVE TWO CIRCUIT BREAKERS ELECTRICALLY CONNECTED THERETO, SAID RECESSES OPERATIVELY POSITIONED AND CONSTRUCTED TO RECEIVED STRAPS HAVING THREADED APERTURES FOR CONNECTION OF BOLTED CIRCUIT BREAKERS AS WELL AS STRAPS HAVING BLADES CONSTRUCTED AND POSITIONED TO RECEIVED PLUG-IN CIRCUIT BREAKERS HAVING HOUSING LENGTHS EQUAL TO THE HOUSING LENGTHS OF THE PREVIOUSLY RECITED BOLTED CIRCUIT BREAKERS, EACH OF SAID STRAPS HAVING THREADED APERTURES BEING SO CONSTRUCTED THAT THE REPLACEMENT THEREOF BY STRAPS HAVING BLADES DOES NOT REQUIRE THE REPOSITIONING OF SAID MOUNTING LEDGES IN ORDER TO MOUNT PLUG-IN CIRCUIT BREAKERS.