Neil, (and all Stovers interested in TLUD history)
Thank you for the information that is included below. Very interesting.
My history document does not give details about the numerous variations
of what have become known as TLUD stoves in the early 2000’s or even
late 1990s. There was a whole separate listserv about backpacker /
tincan stoves. And it is not possible to determine when and where each
stove maker had some spark of inspiration or passing exposure to the
very early writings of Tom Reed or saw someone’s variation of Reed’s
work that dates back to 1985. There were open discussions with many people.
Truly the Bushbuddy stove was being made with quality workmanship early
on, and was marketed. Recognition for that to Fritz Handel and John
Hall, and the cited website below is called to everyone’s attention.
And it is reasonable that even the Chinese units made today might have
had roots back to Hall and Handel and others. Such roots are without
documentation, so each reader can make his or her own opinion about
So, I am sending this message and your message to the entire Stoves
Listserv, and am placing all of this at my website drtlud.com in the
new section that is called “EPosts” (selected External Postings that I
make to the Stoves and Biochar Listservs).
Thank you for bringing this to our attention,
On 2/15/2017 4:04 PM, email@example.com wrote:
> Hi Paul,
> It occurred to me some time ago after reading your TLUD history that
> there was perhaps another inventor of the TLUD, or two even, worthy of
> consideration in your history. The thing is they came up with the basic
> configuration more by accident, at least in the case of Fritz Handel.
> His description of how he sought to create increased air flow around the
> bottom of the stove to avoid scorching what it was sitting on, by
> convection up the sides, between the two cylinders, and *then* it
> occuring to him to close the air gap at the top and introduce the air
> into the top of the burn chamber as secondary air, reveals a different
> experimental process of development leading to essentially the TLUD
> architecture, but it was only some time later he learned that it could be
> used in that mode!
> Here is his own account of the development of his stoves. If nothing
> else it is a lovely story I hope you enjoy reading, but I think
> insightful for processes of multiple invention. Hard to believe my
> Chinese ebay stoves aren’t derivative of this as they share such design
> similarities, particularly the concentrator and pot support.
> I guess the “professor of economics at Portland State University named
> John Hall”, who Friz discovered had a patent on his design, means that it
> should be possible to find that patent and date and details of the
> design? I had a quick look through google patent search, but failed to
> find it. Sometime in the 90s, possibly even 80s perhaps. He also it
> seems marketed it in three sizes, but not with the success later enjoyed
> by Fritz it seems.
> The Bushbuddy web site has more pictures of the stove:
> Best wishes, Neil