Abstract: An alignment clamp for aligning a pair of tubular members in a fixed, end to end relationship comprises a first clamp section having a pair of substantially semiannular first clamp members with first latch ends and first pivot ends, a second clamp section having a pair of substantially semiannular second clamp members with second latch ends and second pivot ends pivotally connected to the first pivot ends, and a latch mechanism operable by a hand lever to releasably engage recessed surfaces at each of the first and second latch ends. According to another aspect of the invention, a method of aligning a pair of tubular members in a fixed, end to end relationship employs clamping fingers which project from clamp members of the first and second clamp sections.

Abstract: A method of manufacturing the outer housing of a metal inert gas welding gun comprising an investment cast process which eliminates the necessity of providing a separately machined threaded end for the gun, thus providing a gun housing which is not only less expensive, but also much stronger than previously available gun housings of this type.