On 05 Feb 2008 18:58:50 GMT, nmp <
[email protected]> wrote:
>carlfogel wrote:
>
>> http://www.google.com/patents?id=U5hJAAAAEBAJ&pg=PP1&dq=598819#PPP1
>>
>> Somehow I doubt that Steinmetz was consulted.
>
>The system reminds me of <http://en.wikipedia.org/wiki/Diesel_electric>
>
>The bike in the patent could have worked to an extent, I guess. Worked in
>the sense that the thing would perhaps have moved forward. A little.
>
>What exactly would Steinmetz have said?
Dear NMP,
Among other things, Steinmetz did considerable work in power
transformers. Edison favored direct current, which just won't work for
powering your home--Steinmetz worked out much of the stuff that gives
us 3-phase alternating current.
Unlike the primarily practical Edison, Steinmetz was a mathematical
genius, who worked out what's often known as Steinmetz's law:
"When Stephen Field, nephew of Cyrus Field of Atlantic Cable fame,
approached Eickenmeyer with a proposal to run trolley cars by
electricity using alternating current, Steinmetz was called upon. When
the transfer from direct current to alternating current was made,
there was a slight delay, slight, but long enough to cause the motor
to overheat. Working in Eickenmeyer’s laboratory and at his residence
at 124 Waverly Street in Yonkers, Steinmetz solved the problem
mathematically and his solution became known as the 'Law of
Hysteresis' or 'Steinmetz’s Law.'"
http://www.yonkershistory.org/stein.html
So I imagine that Steinmetz, who knew a lot about electrical power
transmission, might have looked at the odd bicycle transmission and
said something about the impressive power losses involved in replacing
a simple and incredibly efficient bicycle chain between two sprockets
with a pair of pulleys and two electric motor/generators.
Even a hand-cranked generator for an old field radio gets a lot hotter
than a leg-cranked bicycle chain, which suggests the kind of power
losses involved.
A nice Steinmetz site, with some details of the law of hysteresis. It
shows him rubbing shoulders with Kelvin, Einstein, Marconi, and
Edison:
http://chem.ch.huji.ac.il/history/steinmetz.html
Cheers,
Carl Fogel