| 摘要 |
1,145,441. Blowpipe burners. MESSER GRIESHIEM G.m.b.H. 30 May, 1967 [10 June, 1966], No. 24865/67. Heading F4T. A welding torch has fuel gas supplied through a valve 23 and oxygen through a valve 22, the valves being operated jointly by a lever 25 against spring force and being traversed by narrow by-pass passages 28 which provide enough gas for a pilot light and which can be adjusted by needle valves 29 having valve bodies 30 each with a conical tip which are screwed into the valves 22, 23 coaxially thereto. The valves 22, 23 are supplied through valves 12, 14 and pipes 10, 13. |
