Tig Ac

[Toolmaker51]

and some more: https://www.google.com/search?q=ESAB&ie=utf-8&oe=utf-8. Founded, interestingly by Oscar Kjellberg. In 1904 he pioneered the coated stick electrode! Wonder how many monumental projects, and endless lengths of rod he's responsible for? Happen to know at least three government agencies buy ESAB's. Compact enough to carry up a ladder, not just the inclined variety, vertical shipboard style! So, no, not the Air Force...four more tries.
In US, we most often see Lincoln, Miller, Airco, Hobart, certainly are others. While I can weld, definitely not a real welder. There are a ton of real welders here @ HMT.net to respond.
A lot of folks buy dedicated welding machines, stick, MIG, TIG, etc. Others buy a central unit as a "power supply", and piggyback one or more to it. I'm betting there even are spotweld mechanisms that plug in the same way. Sure would save space, even electrical demands.