Sidewalk heating means for melting snow

Claim 1

A SIDEWALK CONSTRUCTION, COMPRISING A SERIES OF RECTANGULAR INSULATED BLOCKS DISPOSED IN EDGE-TO-EDGE JUXTAPOSITION TO DEFINE A HORIZONTAL LAYER, EACH OF SAID BLOCKS HAVING A CORRUGATED UPPER SURFACE, SAID BLOCKS EACH HAVING AN OUTWARDLY EXTENDING LEDGE AT THE OPPOSITE LATERAL EDGE AN OUTWARDLY EXTENDING LEDGE AT THE OPPOSITE LATERAL EDGE SO THAT THE FLANGE OF EACH BLOCK OVERLAYS THE LEDGE OF THE NEXT ADJACENT BLOCK, A METAL FOIL SHEET OVERLAYING THE LAYER OF BLOCKS AND CONFORMING TO THE CORRUGATIONS THEREIN, A SLAB OF POURED PAVING MATERIAL OVERLAYING THE FOIL SHEET AND LOCKED WITH THE CORRUGATED UPPER SURFACES OF THE BLOCKS, ELECTRICAL HEATING ELEMENTS IN THE BLOCKS, AND INTERENGAGEABLE CONNECTOR ELEMENTS IN THE LEDGES AND FLANGES CONNECTED TO THE ELECTRICAL HEATING ELEMENTS TO DEFINE A CONTINUOUS ELECTRIC CIRCUIT FROM END TO END OF THE LAYER OF BLOCKS, SAID FOIL SHEET SERVING TO CONDUT HEAT FROM THE BLOCKS AND DISTRIBUTE THE HEAT UNIFORMLY TO THE SLAB, AND AN L-SHAPED OTHER BLOCK TERMINATING SAID SERIES OF BLOCKS, SAID OTHER BLOCK HAVING AN ELECTRICAL CONNECTOR ELEMENT ENGAGED WITH A CONNECTOR ELEMENT IN THE BLOCK NEXT ADJACENT SAID OTHER BLOCK IN SAID SERIES, AND A WIRE CONNECTING SAID FOIL SHEET AND THE CONNECTOR ELEMENT IN SAID OTHER BLOCK, SO THAT THE FOIL SHEET SERVES AS A RETURN PATH FOR ELECTRIC CURRENT SUPPLIED TO THE HEATING ELEMENTS.