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AeroElectric-List Digest: 16 Msgs - 11/14/06

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wmorgan31(at)netzero.net
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Posted: Wed Nov 15, 2006 9:18 am Post subject: AeroElectric-List Digest: 16 Msgs - 11/14/06

Robert Bosch (yes, the same as the German company Bosch)invented and 

patented the spark plug as we know it today. He let anyone use the 

patent without paying a royalty fee IF THE THREADS WERE METRIC!



Scott



At 01:55 AM 11/15/2006, you wrote:

 	  Quote: 	
		  Time: 07:36:38 PM PST US

From: Kelly McMullen <kellym(at)aviating.com>

Subject: Re: Temperature (metric) units puzzle

So explain how virtually every American car post WWII used 14mm plugs,

until they went to those tiny ones. Perhaps 14mm and 18mm just happen to

be equal to an English thread size. Especially since they both require

an English unit plug socket, either 13/16 or 7/8.

DBe


	


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