Powered by a Briggs and Stratton 9R6 air-cooled gasoline engine, it is driven by a heavy roller chain on cut tooth sprockets. ... Heavy-Duty Arc Welder Manufacturer: Air Reduction Sales Co., 60 E. 42nd St., New York 17. ... For instant recovery voltage over short circuit, the 36A generator is self-excited with excitation of the main- field obtained through ... Inc., Columbus, Ind. Claims: A new 4-cylinder diesel engine designated as the HR-400, has a maximum rated hp of 110 at 1, 800 rpm.