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Searcher
Senior Member
Username: searcher
Post Number: 251
Registered: 10-2004
| | Posted on Monday, July 28, 2008 - 02:48 pm: | 
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This was in a box of old fittings in a shed. Sure wish the engine had been in the box as well. A day late and a dollar short, again.
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Richard A. Day Jr.
Senior Member
Username: richardday
Post Number: 637
Registered: 11-2003
| | Posted on Monday, July 28, 2008 - 03:03 pm: |
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I wonder when the plug was made. Appears to have 1/2" NPT. Seems to me Henry Ford by sheer waight of numbers made the 1/2" NPT plug a standard for millions of plugs made. I wonder if this plug patent showed 1/2" NPT in 1898??? |
Searcher
Senior Member
Username: searcher
Post Number: 253
Registered: 10-2004
| | Posted on Tuesday, July 29, 2008 - 09:25 pm: |
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The plug is 1/2" NPT. I'm not into spark plugs but I was tickled to find this one just because of the 19th century date on it. As a practical matter, patents typically ran for 17 years so the plug could be as late as 1915 or even later. For instance, look at the Schebler Model D carburetor. The 1902 patent date appeared on the D into the 1930's. |
Richard A. Day Jr.
Senior Member
Username: richardday
Post Number: 641
Registered: 11-2003
| | Posted on Wednesday, July 30, 2008 - 07:01 am: |
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I agree of course I just wonder what the original patent showed. |
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