Neat gadget. I have never seen that one before, but torch guides were popular for a while until electric-eye table cutters made them more or less obsolete for production cutting. The illustration is interesting, the torch in the top right has a handle design that is pecular to the old airco torch....
Arcair is an interesting company in it's own right, it promoted a process for cutting steel using stick electrodes and compressed air, allowing people who otherwise couldn't justify an expensive cutting torch setup to occasionally cut metal if they already had an arc welder, which many mechanics and farmers did...