| 摘要 |
<p>1,191,147. Valves. DURA CORP. 12 June, 1967 [29 June, 1966], No. 27065/67. Heading F2V. [Also in Division F4] The amount of combustion air supplied to a burner having a fuel nozzle 160 is controlled by two plates each having semi-circular cutouts 147, 152, one plate being rotatable with respect to the other within the limits of a slot 153 to vary the size of the apertures. Vanes 143 are provided to deflect the air towards a central opening 142 housing the burner after the air has passed through the apertures.</p> |
