The Story of Alternating Current Arc Welding
Demonstrates the differences between alternating current and direct current arc welding processes, and in particular the finer control available with AC machines at the time.
Demonstrates the differences between alternating current and direct current arc welding processes, and in particular the finer control available with AC machines at the time.

1987

2014

1996
1952

2013

1972

1949

1996
1996

2006

2009

1993

1938

1991
2011

2008

1999

1931

1986

1999