Thanks for the reply, the inner diameter of the bowl shape is about 2". Someone who had one for sale claimed it was a torch igniter. According to him you would attach a live wire to the part at the back of the handle with the spring, then take the torch and put it into the bowl, making contact with the small spike, and as the torch approaches the metal strips in the bottom of the bowl, it creates a short circuit and an electrical arc, thus lighting the torch. The bowl is useful in holding a small concentration of the gas, making it easier for it to light.
I'm not sure if he is correct, and if he is, I'd like to know exactly how it's wired, just one wire on the handle wouldn't work.
Whatever it is, it wasn't used very much.