| 摘要 |
<p>A burner for firing metal or glass products comprises a known body 10 for imparting rotation to a mixture of fuel gas and air and a burner head 12 comprising a generally spherical interior chamber 50 connected to the burner body by means of a passage 42 which converges in the direction of the chamber; and an elongated opening 58 connected to the chamber by means of a passage 54 with walls 62, 64 diverging in the direction of the opening, one large side of the opening comprising a ridge 74 and a curved section 72 and the other large side of the opening comprising a second ridge 56. The flame is shaped by moving the relative positions of parts 32 and 34 along the joint line 36 so as to adjust the space between the ridges. <IMAGE></p> |
