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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Tom Reed can provide some history. I have four of them that we evaluated for Tom in about 1990.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Tom Miles <o:p></o:p></span></p><p class=MsoNormal><a name="_MailEndCompose"><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></a></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Stoves [mailto:stoves-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Julien Winter<br><b>Sent:</b> Wednesday, November 19, 2014 4:52 PM<br><b>To:</b> Discussion of biomass cooking stoves<br><b>Subject:</b> SPAM: [Stoves] Jeremy Wartluft, Monserrat 1984<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>Hello Stoves;<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Jeremy Warfluft was certainly doing some interesting research in 1984. One of the stoves mentioned in his document was the Z-stove, developed by the Hottenroths. They hold a number of very interesting patents:<o:p></o:p></p></div><div><p class=MsoNormal><br clear=all><o:p></o:p></p></div><div><p class=MsoNormal>Hottenroth, FW Sr.; Jacoby, HD. 1966. Forced Draft Solid Carbon Fuel Burning Cooker US Patent 3,279,452<br>Hottenroth, FW Sr.; Hottenroth, FW Jr.. 1975. Portable forced draft solid fuel burning cooker. US Patent 3,868,943<br>Hottenroth, FW Sr.; Hottenroth, FW Jr.. 1976. Portable forced draft cooker. US Patent 3,982,522 A<br>Hottenroth, FW Sr.; Hottenroth, FW Jr.. 1984. Compact stove for emergency and other uses. US Patent 4,471,751<br>Hottenroth, FW Sr.; Hottenroth, FW Jr.. 1988. Biomass Stove. US Patent 4,730,597 <br>Hottenroth, FW Sr.; Hottenroth, FW Jr.. 1991. Portable Stove. US Patent 5,024,208<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Some of their stoves look like modern TLUDs, although I suspect that they didn't have top-lit operation in mind, but where thinking of burning chunky fuel with large pore-spaces, which would produce a fire at many levels down to the grate.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>The Z-stove in Warfluft's document was probably an earlier version of the Hottenroths'1988 patent, <a href="http://www.google.com/patents/US4730597">http://www.google.com/patents/US4730597</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Their 1966 patent looks strikingly like a flattened version of a modern forced draft TLUD: <a href="http://www.google.com/patents/US3279452">http://www.google.com/patents/US3279452</a><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Has anyone ever heard of, or see a "Z-stove"?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Cheers,<o:p></o:p></p></div><div><p class=MsoNormal>Julien.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><br>-- <o:p></o:p></p></div><div><div><p class=MsoNormal>Julien Winter<br>Cobourg, ON, CANADA<o:p></o:p></p></div></div></div></div></body></html>