Re: Headbolt Heater


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Posted by Bill K [66.249.39.44] on Tuesday, August 16, 2011 at 14:48:13 :

In Reply to: Re: Headbolt Heater posted by Paul(in NY) [12.64.186.94] on Tuesday, August 16, 2011 at 08:11:45 :

This is from Wikipedia
Andrew Freeman of Grand Forks, North Dakota invented the head bolt heater in around 1940 and received a patent for it on November 8, 1949. In 1951, Freeman received another patent on an improved head bolt heater. These early heaters replaced one of the engine's cylinder head bolts with a hollow, threaded shank containing a resistive heating element.



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