The Hank Roberts type stove was made by EFI and sold under at least the following names: Hank Roberts, Browning, EFI, and Gerry. I've seen other names on them as well.
Even though you can't get the canisters anymore, there are still a lot of them around which is a testament to their popularity. They were a darned good stove for their day and age although they're a little heavy by our standards today.
Yes, there were some cases of explosion. Usually, those were cases (from what I've read) where people used a windscreen which trapped heat, particularly if they were using a wide pot/pan. Really, the very same thing could happen with a canister stove today. Perhaps the Hank Roberts type explodes more easily? I don't know. I know that at one time fuel canisters for this type of stove were available from Hank Roberts, Optimus, Coleman, and Thermos (yes, Thermos used to be in the stove business), but they all discontinued them around the same time. Nothing like the threat of lawsuits to shut things down.
I wish I could find Henrik. I have several of his adapters for my old stoves. Every one of them is brilliantly designed and manufactured. But he is no longer selling on eBay nor is he posting on the forum where I met him originally.
Regarding the specific adapter Henrik made for my Hank Roberts stove, yes, an adapter that directly threads into the burner column would be better. In this case I have a Gerry infrared stove and a conventional Hank Roberts stove. Henrik wasn't sure that a single threaded adapter would fit both stoves, so he made me a universal adapter that will fit any stove with a Hank Roberts type needle.