Household cooking ovens provided with slidably supported racks

Claim 1

IN A HOUSEHOLD OVEN INCLUDING A METAL LINER DEFINING A COOKING CAVITY, A HEATING SYSTEM OPEATIVE TO HEAT SAID LINER AND THE AIR IN SAID COOKING CAVITY, WHEREBY NORMAL FOOD-COOKING OPERATIONS MAY BE CARRIEED OUT IN SAID COOKING CAVITY N THE NORMAL FOOD-COOKING TEMPERATURE RANGE EXTENDNG FROM ABOUT 150* F. TO ABOUT 550* F. AND WHEREBY FOOD SOILS ACCUMULATED UPON TEH INTERIOR SURFACES OF SAID LINER MAY BE CLEANED THEREFROM IN THE HEATCLEANING TEMPERATURE RANGE EXTENDING FROM ABOUT 750* F. TO ABOUT 950* F., SAID LINER BEING OF BOX-LIKE FROM INCLUDING A PAIR OF LATERALLY SPACED-APART UPSTANDING SIDE WALLS AND HAVING AN OPEN FRONT, A PAIR OF ELONGATED METAL RAILS RESPECTIVELY CARRIED BY SAID SIDE WALLS AND RESPECTIVELY PROJECTING INWARLDY THEREFORM INTO SAID COOKING CAVITY AND ARRANGED IN A GENERALLY HORIZONTAL PLANE, AND A METAL RACK ARRANGED IN SAID COOKING CAVITY AND MOUNTED UPON SAID RAILS FOR SLIDING MOVEMENTS INTO AND OUT OF SAID COOKING CAIVTY THROUGH THE OPEN FRONT OF SAID LINER; THE COMBINATION COMPRISING A PAIR OF SUPPORTS RESPECTIVELY CARRIED BY SAID SIDE WALLS AND RESPECTIVELY ARRANGED ADJACENT TO THE FRONT PORTIONS OF SAID RAILS AND RESPECTIVELY ENGAGING SAID SUPPORTING THE OPPOSITE SIDES OF SAID RACK IN ITS SLIDING MOVEMENTS; EACH OF SAID SUPPORTS BEING OF COMPOSITE CONSTRUCTION AND COMPRISING AN INNER BACKING MEMBER FORMED ESSENTIALLY OF MATERIAL SELECTED FROM THE CLASS CONSISTING OF STAINLESS STEELS AND NICKEL-COPPER ALLOYS, AN OUTER BEARING MEMBER FORMED ESSENTAILLY OF FINE SILVER, AND AN INTERMEDIATE LAYER BONDED BOTH TO SAID INNER BACKING MEMBER AND TO SAID OUTER BEARING MEMBER AND FORMED ESSENTIALLY OF A SILVER-COPPER ALLOY THAT CONSISTS ESSENTIALLY OF ABOUT 72% SILVER AND ABOUT 28% COPPER BY WEIGHT.