new to the forum...hi! , just peeked my interest. I have not heard anyone mention the pipe cap air control knobs before. Got it from my dad a time ago, Works awesome! he had said talked to them directly trying to get the stove early on for some time when they came out. I think it is one of the early ones? Not sure but Does not really matter, he used it, taught me to use it, i now thought my children how to use it. hopefully i will live on! But would like to learn more of the time period and any other info anyone can tell me about it. Thanks!
These were the first air dampers made by drilling a hole in a 2 inch pipe cap and plug welding a 1/2 bolt to the cap.
Bob Fisher’s dad, Baxter designed a cap with fins to be able to use your foot to adjust without burning your hand or wearing gloves. He called it the EZ-Spin. Baxter patented his invention and they were sold to fabricators licenses to build the stoves as well as others. He set the price at 3.50 and Bob was not happy since he knew fabricators could make their own cheaper. Bob soon came out with his own 5 fin design made of aluminum you see on most stoves.
These early stoves were all on the West coast where the early fabricators were. As territorial licenses were sold across the US and Canada, improvements and changes took place allowing close dating of the stoves during development. I have dated advertisements, brochures, some internal paperwork and revised drawings showing the changes being made.
Stoves built during the period of pipe caps had a chrome ball handle, a short handle lever, and early doors with no trees, or trees with patent pending. Fabricators used up old stock parts and a box of old parts could be found later mixing older styles with new. So dating a stove uses many factors other than just a damper or handle knob or spring type.
The handle on your stove is quite long, and the door is not a very early one. This handle and what looks like a chrome knob, (or stainless steel tightly wound spring handle not fully shown in pic) would be common parts during 1976. The picture is very limited, but I will guess it has a bent one piece top. Other details such as leg angle cuts, brick retainers, and feet help date and confirm where it was made.
The Everything Fisher thread in the sticky section is the place to start to find more details about the few things I mentioned. Then the Bear Series stove details thread for details of the single door stoves.
Using the search feature at top you will find a entire thread devoted to air dampers picturing the different caps and materials used, different finishing and buffing techniques and plating of later dampers.