| 摘要 |
1,233,096. Welding by fusion. UNITED AIRCRAFT CORP. 30 May, 1968 [8 June 1967], No. 25998/68. Heading B3R. [Also in Division H1] In electron beam or like apparatus for circumferentially welding pipes in which a welding carriage orbits the pipes within an annular evacuated chamber, a tracking device searches for and locates in the seam during one revolution of the carriage and, when the carriage is moved in the reverse direction during welding, follows the seam and directs the beam accurately on to the seam. The apparatus is identical to that described in Specification 1,233,094. |
