Re: [TCML] Does Patent 500,630 predate Tesla's coil?

[mddeming@xxxxxxx]

Hi Jim,

1) Some of Tesla's work with resonant air-core transformers predates this patent by about a year. 
2) This patent involves a spark-gap oscillator using iron-core inductors; essentially a form of inverter to convert DC to AC.?
3)?Thompson and Tesla were both pioneers of alternating current development, and were familar with each other's work.?
4) When Thompson's company?merged with Edison's to form General Electric, Thompson became its chief engineer.?
5) Your friend probably saw this website:


http://www.lindsaybks.com/gallery/teslamyth/ttesla2.html


IMO, Lindsay publications is sort of the "National Enquirer" of technical publication. They reprint a lot of out-of-print articles, magazines and books from the late 19th and early 20th century, which is great. But?while doing so, they also publish and promote a lot of garbage by conspiracy theorists, fringe and pseudoscience advocates, alien abductionists, quack medicine, free energy, 4th dimension travel, etc. It's a good place for experienced coilers to do historical research, or even some "crackpot mining" but not for newbies?looking for?a good grounding in reality.
?
Matt D.





-----Original Message-----
From: Jim Harvey (UDN) <harvey.james@xxxxxxxxxxxxxxx>
To: 'Tesla Coil Mailing List' <tesla@xxxxxxxxxx>
Sent: Sat, 30 May 2009 9:51 am
Subject: [TCML] Does Patent 500,630 predate Tesla's coil?



 
Greetings...
 
A friend pointed out a patent 500630 that appears to predate Tesla on the
invention of the "Tesla Coil." A link to this patent is at:
http://www.google.com/patents?id=pdZBAAAAEBAJ
<blocked::http://www.google.com/patents?id=pdZBAAAAEBAJ&dq=500630>
&dq=500630
 
Any thoughts or comments? 
 
73 & Stay Vertical,

Jim Harvey (W7YV) - The Great Curmudgeon
Hunkered down in the USA

FIST # 13337
SKCC # 3194

 

 

 
 
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