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Rundle Powder Thawer "Dynamite Warmer"

Currency:USD Category:Collectibles / Mining Start Price:500.00 USD Estimated At:1,000.00 - 3,000.00 USD
Rundle Powder Thawer  Dynamite Warmer
SOLD
3,300.00USDto b**********n+ buyer's premium (792.00)
This item SOLD at 2017 Apr 28 @ 12:46UTC-7 : PDT/MST
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"The Rundle Powder Thawer, a device which has been in use for some years in the mines of the Lake Superior for thawing dynamite and other high explosives and was invented by Mr J.J. Rundle of Iron Mountain, Mich is now being introduced in the West by the Hendrie & Bolthoff Manufacturing Company of Denver. If this company can by the introduction of the Rundle apparatus overcome the predilection of many Colorado miners to thaw dynamite in a kitchen stove, it will have accomplished something in a humanitarian way as well as in a commercial." - 1897 Engineering and Mining Journal, Volume 64.



Frozen dynamite was an issue for miners in areas where temperatures dropped below freezing, as the dynamite could not ignite. Dynamite when thawed too rapidly was unstable, so miners placed frozen sticks in dynamite in these metal containers that could warm the dynamite gradually and safely.



This Powder Thawer measures 16.25" x 9.5." A copper patent seal is located on one of the sides and reads "Rundle Bros. Patented 1887. Iron Mountain, Mich." On the other side is a stamp that reads "Rundle Power Thawer. Pat Nov. 22 1887. Manufactured by Hendrie & Bolthoff Manufacturing Company of Denver." This a ultra rare piece of mining history! State:Colorado City:Denver Date:c1895 ID#45336