| 摘要 |
<p>A safety gas cock for a dual burner, provided with one central flame ring (6) and at least one outer flame ring (8, 8') concentric with said central ring, said cock being of the type comprising two outlets (12, 14) which independently feed said central ring (6) and said outer ring (8, 8'), and with an adjustment cone (29) operable by a rotary knob (32) to adjust gas distribution either towards only said central ring (6) or towards said central ring (6) and towards said outer ring (8, 8') simultaneously, characterised in that said adjustment cone (29) defines a central position in which both said outlets (12, 14) are closed, and from which central position it can be rotated in one direction to adjust the gas flow through a single outlet (12) between a maximum value and a minimum value, and in the other direction to adjust the gas flow through both outlets (12, 14) between a maximum value and a minimum value.</p> |
