Power supply circuitry for lighting fixtures or the like

Claim 1

IN POWER SUPPLY CIRCUITRY FOR A PLURALITY OF LIGHTING FIXTURES WHEREIN MEANS ARE PROVIDED TO ENERGIZE ALL FIXTURES AND MEANS ARE PROVIDED TO ENERGIZE SELECTED ONES OF THE FIXTURES ONLY; THE COMBINATION OF AN ELECTRICAL CABLE FOR EACH OF SAID FIXTURES HAVING MALE AND FEMALE CONNECTING PLUGS AT OPPOSITE ENDS THEREOF, A PLURALITY OF CONDUCTORS IN EACH OF SAID CABLES WHICH ARE ELECTRICALLY INSULATED FROM EACH OTHER, MEANS CONNECTING THE CABLES IN SERIES WHEREBY THE MALE PLUG OF ONE FIXTURE IS INSERTED INTO THE FEMALE PLUG OF THE SUCCEEDING FIXTURE AND VICE VERSA, A TERMINAL BLOCK CARRIED ON EACH OF SAID LIGHTING FIXTURES, MEANS CONNECTING A FIRST PAIR OF SAID CONDUCTORS IN EACH CABLE TO A FIRST SET OF THE TERMINALS ON THE TERMINAL BLOCK ASSOCIATED WITH THAT CABLE, MEANS CONNECTING SAID FIRST SET OF TERMINALS ON CERTAIN OF SAID TERMINAL BLOCKS TO THEIR ASSOCIATED LIGHTING FIXTURES SUCH THAT SAID ASSOCIATED LIGHTING FIXTURES WILL BE ENERGIZED WHEN THE CABLES ARE INTERCONNECTED AND SAID FIRST SET OF CONDUCTORSS ARE ENERGIZED, MEANS CONNECTING A SECOND PAIR OF THE CONDUCTORS IN EACH CABLE TO A SECOND SET OF THE TERMINALS ON THE TERMINAL BLOCK ASSOCIATED WITH THAT CABLE, AND MEANS CONNECTING SAID SECOND SET OF THE TERMINALS ON SELECTED ONES OF THE TERMINAL BLOCKS TO THEIR ASSOCIATED LIGHTING FIXTURES WHEREBY SAID LATTER-MENTIONED ASSOCIATED LIGHTING FIXTURES WILL BE ENERGIZED WHEN SAID SECOND SET OF CONDUCTORS ARE ENERGIZED.