公开(公告)号：US1770149A

公开(公告)日：1930-07-08

申请号：US10626826

申请日：1926-05-03

申请人： ARTHUR L LEWIS ,  FREDERICK J SHEPARD JR

发明人： NATHANIEL WARSHAW

IPC分类号： F01M5/00

CPC分类号： F01M5/00

公开(公告)号：US06548780B2

公开(公告)日：2003-04-15

申请号：US09797403

申请日：2001-02-28

申请人： Arthur L. Lewis

发明人： Arthur L. Lewis

IPC分类号： B23K1100

CPC分类号： B23K11/004 ,  B23K2101/12

摘要： A technique for resistance welding an attachment such as a collar or base ring to a tank head section by causing welding current to flow through weld protrusions disposed on the attachment and which are pressed against the tank section. Electrodes are contacted to the attachment and the tank section in such a manner to provide for substantially equal welding current paths through the protrusions.