Electrical Engineering - Re: Tesla's original patent application for the AC Induction Motor Aug 5, 1890

Author

Re: Tesla's original patent application for the AC Induction Motor Aug 5, 1890

Don Kelly

2007-01-24, 3:26 am

"Bud--" <remove.BudNews@isp.com> wrote in message
news:b23ad$45b59e0c$4213eab0$19521@DIALUPUSA.NET...
> Don Kelly wrote:
>
> It is amazing that Tesla filed about 20 patents on motors, most from 1886
> to 1889. Patents cover 2 and 3 phase and many variations for single phase
> including cap start and many variations for split phase. The patent above
> was not one of his better ones. Additional patents covered AC generators
> and transmission. He covered the possibilities so well AC motors couldn't
> be made without using his patents. (Many companies used a traditional
> response, they infringed.) I never heard his name in school (except maybe
> for the Tesla coil). Have things improved?
>
> Tesla also has the basic patent for radio - using an L-C circuit for
> tuning. His 1900 patent was found to have priority by the US Supreme Court
> in 1943. This is even more buried than his contributions to AC.
>
>
>
> LOL. I forgot Keelynet was a center for 'alternate' physics.
>
> They probably have Tesla's death ray (his papers were impounded for years
> when he died and some are apparently still classified) and the
> 'conspiracy' to suppress transmission of power (including his unfinished
> tower at Wardenclyffe, Long Island, New York).
>
> --
> bud--
----------
Tesla's name is not forgotten in the electrical machine and power world.
Note that the unit for magnetic flux density in the MKS system is the Tesla
(used to be Weber/m^2)
He made many contributions and the polyphase machine and variants are what
he should be remembered for (the transformer which made long distance
transmission possible was invented by Gaulard and Gibbs).
Unfortunately, in his later years, claims and facts and mental deterioration
meant that most of what he then did was useless. I would like to remember
him for what he really did.

--

Don Kelly dhky@shawcross.ca
remove the X to answer
----------------------------

J. B. Wood

2007-01-24, 9:25 am

In article <1cCth.795750$R63.150575@pd7urf1no>, "Don Kelly"
<dhky@shawcross.ca> wrote:

> Tesla's name is not forgotten in the electrical machine and power world.
> Note that the unit for magnetic flux density in the MKS system is the Tesla
> (used to be Weber/m^2)
> He made many contributions and the polyphase machine and variants are what
> he should be remembered for (the transformer which made long distance
> transmission possible was invented by Gaulard and Gibbs).
> Unfortunately, in his later years, claims and facts and mental deterioration
> meant that most of what he then did was useless. I would like to remember
> him for what he really did.

Hello, and it's regrettable that outside of the EE community Tesla isn't
generally recognized for his lasting contributions to the art. It's
ironic that the device most asscociated with Tesla has no apparent
practical use (unless you count a TV flyback transformer which is not
really a resonant transformer).

The U.S. Postal Service did honor him (along with Armstrong, Steinmetz and
Farnsworth) in a commemorative stamp issue some years back. Margaret
Cheney does a decent job IMHO in her bio on Tesla although the author in a
few instances gives the impression that some of Tesla's fantastic
contrivances (such as a hand-sized "earthquake generator" causing wild
vibrations of a bridge) worked as claimed. Sincerely,

John Wood (Code 5550) e-mail: wood@itd.nrl.navy.mil
Naval Research Laboratory
4555 Overlook Avenue, SW
Washington, DC 20375-5337

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