| 摘要 |
<p>ANDIRON FOR SUPPORTING LOGS Andiron for supporting logs on a hearth in two primary fuel banks disposed in an inverted V-position to form triangular opening facing room to be heated. Andiron has horizontal baffle member supported above and between spaced positioning members by frame means. Baffle member and positioning members on each side of andiron are positioned so that primary fuel banks extend between edges of baffle member and positioning members so as to be inclined at particular angles with banks almost touching at apex. Secondary fuel placed between lower ends of primary fuel banks when ignited cooperates with primary fuel to form a concentrated, triangular-sectioned combustion zone of essentially uniform temperature defined by burning faces of primary and secondary fuel. Primary fuel burns mostly on inner faces with negligible burning of outer faces which reduces convection losses up the chimney. The inner faces of primary fuel banks and burning secondary fuel provides three radiating surfaces which tend to sustain combustion of oppositely facing radiant surfaces by absorption and re-radiation of radiant heat between the surfaces.</p> |
