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Justin227
Yellow-bellied Woodpecker
Joined: Jun 02, 2009
Age: 20
Posts: 51
Location: United States, Michigan
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 Posted: Fri Jul 10, 2009 2:28 pm Post subject: Happy Birthday Nikola Tesla! |
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| I think he had AS....but I wont make another thread asking your thoughts. Anyway yes, Tesla's birthday today. |
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OddFinn
Velociraptor
Joined: Jun 28, 2009
Posts: 473
Location: Finland
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| Posted: Fri Jul 10, 2009 2:38 pm Post subject: |
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He was a true Inventor and I respect him very much.
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Any connection between your reality and mine is purely coincidental. |
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hartzofspace
Red Dragon
Joined: Apr 15, 2005
Posts: 4847
Location: In the Fortress Of Solitude
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| Posted: Fri Jul 10, 2009 6:07 pm Post subject: |
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Happy Birthday, Tesla! You were utterly fascinating!
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Never be bullied into silence. Never allow yourself to be made a victim. Accept no one's definition of your life; define yourself! |
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sinsboldly
Free Range Aspie
Joined: Nov 22, 2006
Age: 59
Posts: 13200
Location: Oregon, USA
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| Posted: Fri Jul 10, 2009 9:12 pm Post subject: |
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My brother moved to outside Colorado Springs just to be near where his hero dwelt. My brother and I shared housekeeping duties. He was sent to dust the house and my job was to scrub the kitchen floor and both of us were to do the dinner dishes. Brother was always working in the workshop in the basement on a Tesla coil for the science fair. I remember touching it and having my hair rise, or hold onto an incandescent light bulb and it would roil the light in side, or a florescent tube would light in your hands.
I kept noticing Brother didn't dust anymore, but I was scrubbing that kitchen floor four times a week. I finally suggested to Brother that the Tesla coil, positioned directly under the kitchen floor was drawing all the dust onto the linoleum of the kitchen floor. Brother turned it off for a couple of days and the dust went back into the living room and bedrooms and I only scrubbed twice a week. That was enough for him, he turned it on and never turned it off after that.
Happy Birthday, Nicola Tesla!
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where sin abounds, grace abounds the more;
Non omnis moriar |
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JohnnyCarcinogen
Phoenix
Joined: Jun 30, 2007
Posts: 657
Location: Missouri, USA
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| Posted: Mon Jul 13, 2009 2:48 pm Post subject: |
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Tesla got f***ed over by Edison. Edison was no inventor; he just stole from Tesla.
_________________
"Unless someone like you cares a whole awful lot, nothing is going to get better. It's not."
- The Lorax by Dr. Seuss
"In a time of universal deceit, telling the truth becomes an act of rebellion."
- George Orwell |
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ruveyn
Phoenix
Joined: Sep 22, 2008
Age: 73
Posts: 4789
Location: New Jersey
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| Posted: Mon Jul 13, 2009 10:41 pm Post subject: |
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| JohnnyCarcinogen wrote: | | Tesla got f***ed over by Edison. Edison was no inventor; he just stole from Tesla. |
Edison did invent stuff, but he had no theoretical talent. Edison was a cut and try empirical type of inventor. Since he hardly slept at all, he had plenty of time for trying this and trying that until sometimes something worked. Which is how Edison got the tungsten filament for his glow lamp.
Edison accidentally discovered the diode in 1883 (see Edison Effect) but he had no real theoretical grasp so he did not know what he accidentally discovered. As a result radio that could carry voices had to wait another thirty years.
Tesla, on the other hand, was both theoretical and practical. Tesla was an excellent mathematical physicist (although he did have some mistaken ideas). Tesla believed radio wavers were longitudinal, rather than transverse, for example. He did not accept Hertz interpretation of Maxwell's Equations.
ruveyn |
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JohnnyCarcinogen
Phoenix
Joined: Jun 30, 2007
Posts: 657
Location: Missouri, USA
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| Posted: Tue Jul 14, 2009 11:36 am Post subject: |
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| ruveyn wrote: | | JohnnyCarcinogen wrote: | | Tesla got f***ed over by Edison. Edison was no inventor; he just stole from Tesla. |
Edison did invent stuff, but he had no theoretical talent. Edison was a cut and try empirical type of inventor. Since he hardly slept at all, he had plenty of time for trying this and trying that until sometimes something worked. Which is how Edison got the tungsten filament for his glow lamp.
Edison accidentally discovered the diode in 1883 (see Edison Effect) but he had no real theoretical grasp so he did not know what he accidentally discovered. As a result radio that could carry voices had to wait another thirty years.
Tesla, on the other hand, was both theoretical and practical. Tesla was an excellent mathematical physicist (although he did have some mistaken ideas). Tesla believed radio wavers were longitudinal, rather than transverse, for example. He did not accept Hertz interpretation of Maxwell's Equations.
ruveyn |
The lightbulb was NOT invented by edison - Tesla came up with the original bulb himself; he just had a different socket for it, of which was criticized by edison heavily.
Also, Tesla brought AC current to the table, and without AC, we'd be covered in gigantic DC wires. Edison tried to strangle AC current by every means possible until he stole it.
_________________
"Unless someone like you cares a whole awful lot, nothing is going to get better. It's not."
- The Lorax by Dr. Seuss
"In a time of universal deceit, telling the truth becomes an act of rebellion."
- George Orwell |
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ruveyn
Phoenix
Joined: Sep 22, 2008
Age: 73
Posts: 4789
Location: New Jersey
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| Posted: Wed Jul 15, 2009 12:24 pm Post subject: |
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| JohnnyCarcinogen wrote: |
The lightbulb was NOT invented by edison - Tesla came up with the original bulb himself; he just had a different socket for it, of which was criticized by edison heavily.
Also, Tesla brought AC current to the table, and without AC, we'd be covered in gigantic DC wires. Edison tried to strangle AC current by every means possible until he stole it. |
Electrical resistance was known well before Edison. The issue was the filiment and what it should be made of. That is where Edison hit the jackpot. He cut and he tried and he did this and he did that and he finally hit upon tungsten.
Edison's real genius was business. Having a glow lamp that would last more than a few days, he had to design a package in which to wrap it. He did. He sold entire power generating systems. What good is a glow lamp without a source of power (other than wet cells)? When he got the contract to light up the lower part of Manhattan, he supplied the generating stations and the power lines and link-ups to buildings. That is what made him a rich man. He knew what made various technologies commercially viable. Tesla, on the other hand, was a much more brilliant inventor but a terrible, bad, rotten businessman which is why he lost two fortunes and came out behind in the race for $$$$. The fact that he invented radio before Marconi did him little good. He died in in poverty. Tesla was also a monomaniac he refused to admit his theory of longitudinal electromagnetic waves was in error. Based on his (wrong) theory he believed he could transmit powr usefully without wires. The only practical wireless transmission is beamed electromagnetic waves and they are transverse, not longitudinal.
Tesla's greatest contribution was AC power generation, motors and transformers. His epynomous coil is still a major item in power systems. Edison was dead wrong in his advocacy of Direct Current for household use. It cannot be stepped up and down easily and D.C. transmission is less efficient than high voltage A.C..
ruveyn |
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Keith
Guarding my post here
Joined: Aug 13, 2008
Age: 26
Posts: 2151
Location: East Sussex, UK
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| Posted: Wed Jul 15, 2009 12:35 pm Post subject: |
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| Can someone find and post a picture of Nikola Tesla? |
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JohnnyCarcinogen
Phoenix
Joined: Jun 30, 2007
Posts: 657
Location: Missouri, USA
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| Posted: Wed Jul 15, 2009 1:49 pm Post subject: |
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| ruveyn wrote: | | JohnnyCarcinogen wrote: |
The lightbulb was NOT invented by edison - Tesla came up with the original bulb himself; he just had a different socket for it, of which was criticized by edison heavily.
Also, Tesla brought AC current to the table, and without AC, we'd be covered in gigantic DC wires. Edison tried to strangle AC current by every means possible until he stole it. |
Electrical resistance was known well before Edison. The issue was the filiment and what it should be made of. That is where Edison hit the jackpot. He cut and he tried and he did this and he did that and he finally hit upon tungsten.
Edison's real genius was business. Having a glow lamp that would last more than a few days, he had to design a package in which to wrap it. He did. He sold entire power generating systems. What good is a glow lamp without a source of power (other than wet cells)? When he got the contract to light up the lower part of Manhattan, he supplied the generating stations and the power lines and link-ups to buildings. That is what made him a rich man. He knew what made various technologies commercially viable. Tesla, on the other hand, was a much more brilliant inventor but a terrible, bad, rotten businessman which is why he lost two fortunes and came out behind in the race for $$$$. The fact that he invented radio before Marconi did him little good. He died in in poverty. Tesla was also a monomaniac he refused to admit his theory of longitudinal electromagnetic waves was in error. Based on his (wrong) theory he believed he could transmit powr usefully without wires. The only practical wireless transmission is beamed electromagnetic waves and they are transverse, not longitudinal.
Tesla's greatest contribution was AC power generation, motors and transformers. His epynomous coil is still a major item in power systems. Edison was dead wrong in his advocacy of Direct Current for household use. It cannot be stepped up and down easily and D.C. transmission is less efficient than high voltage A.C..
ruveyn |
I think I can agree with that - Tesla WAS a crappy businessman, but then again, I'm not keen on businessmen myself.
_________________
"Unless someone like you cares a whole awful lot, nothing is going to get better. It's not."
- The Lorax by Dr. Seuss
"In a time of universal deceit, telling the truth becomes an act of rebellion."
- George Orwell |
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twoshots
Boltzmann Brain
Joined: Nov 27, 2007
Posts: 4229
Location: Boötes void
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| Posted: Wed Jul 15, 2009 3:04 pm Post subject: |
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| Keith wrote: | | Can someone find and post a picture of Nikola Tesla? |
Clicky
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* here for the nachos. |
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Tiberius
Butterfly
Joined: Jul 16, 2009
Age: 24
Posts: 9
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| Posted: Thu Jul 16, 2009 6:36 am Post subject: |
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| Quote: | | D.C. transmission is less efficient than high voltage A.C.. |
HVDC transmission is actually more efficient than HVAC transmission in some cases and many proposed or recently constructed transmission lines are of this design. Quarter wave of 60Hz at ~775 miles introduces the need for impedance matching in long range transmission of HVAC which can be lossier and more expensive than the inversion of HVDC for AC distribution. HVAC also has greater corona losses than HVDC.
It's at distribution that AC shines. DC distribution utilized similar voltage to AC wall voltage without an intermediate voltage, resulting in higher currents, higher I^2*R losses, and variable voltage dip as you go down the line which cannot be cost-effectively compensated. With AC distribution one can use an intermediate voltage for distribution to reduce current and ohmic losses, and simply change taps at the distribution transformer to compensate for the voltage dip. |
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ruveyn
Phoenix
Joined: Sep 22, 2008
Age: 73
Posts: 4789
Location: New Jersey
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| Posted: Thu Jul 16, 2009 7:22 am Post subject: |
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| Tiberius wrote: | | Quote: | | D.C. transmission is less efficient than high voltage A.C.. |
HVDC transmission is actually more efficient than HVAC transmission in some cases and many proposed or recently constructed transmission lines are of this design. Quarter wave of 60Hz at ~775 miles introduces the need for impedance matching in long range transmission of HVAC which can be lossier and more expensive than the inversion of HVDC for AC distribution. HVAC also has greater corona losses than HVDC.
It's at distribution that AC shines. DC distribution utilized similar voltage to AC wall voltage without an intermediate voltage, resulting in higher currents, higher I^2*R losses, and variable voltage dip as you go down the line which cannot be cost-effectively compensated. With AC distribution one can use an intermediate voltage for distribution to reduce current and ohmic losses, and simply change taps at the distribution transformer to compensate for the voltage dip. |
Yeah but! Converting the HVDC back to AC so it can be distributed easily (i.e. using transformers) is a lossy process. Overall AC is the way to go. In addition AC motors do not need brushes and they can be multi-phased. There is a good reason why AC rules and DC does not (except for batteries and such like).
ruveyn |
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ruveyn
Phoenix
Joined: Sep 22, 2008
Age: 73
Posts: 4789
Location: New Jersey
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| Posted: Thu Jul 16, 2009 7:44 am Post subject: |
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I read an article that shows HVDC is a good thing for very long distance transmission of power, transmission by undersea cable and transmission between regions that use differing frequencies of AC (for example 50 cycle vs 60 cycle). So there are uses for it. At the time Edison and Tesla were fighting it out there did not exist semi-conductor devices that could rectify DC current. Only mechanical breakers were available. So the existence of semi-conductors has opened up uses for DC once more.
Strangely enough, HVDC can be transmitted through the earth in a wireless fashion which is ironic since Tesla was monomaniac about wireless transmission of power. In his time, this pretty well eliminated DC as a possibility.
ruveyn |
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