Re: Resonator theory and Nikola Tesla

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "harvey norris by way of Terry Fritz <twftesla-at-uswest-dot-net>" <harvich-at-yahoo-dot-com>


--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Marco Denicolai by way of Terry
> Fritz <twftesla-at-uswest-dot-net>"
> <marco.denicolai-at-tellabs-dot-com>
> 
> Hello all.
> 
> While digging for the roots of the air-coupled
> resonator theory, I
> bumped into the Oberbeck reference
> 
> A. Oberbeck, Wied. Ann. 55, 1895.
This document presumably in German contains Tesla's
name in the title. It probably was not an independent
developement by Oberbeck. He published a theoretical
analysis of Tesla's oscillator in 1895.
> 
> I haven't got the paper, but I know that there the
> basic laws for
> air-coupled resonators are stated, for the case
> where L1*C1=L2*C2.
> 
> Now, if I recall Tesla stayed in Colorado Springs
> from May 1899 until
> early 1900, and there he developed the 2-coil TC and
> the magnifier.
> 
> My questions is, was Tesla aware of Oberbeck's work?
Rather the inverse situation I would think.
> If he wasn't, how's that possible?
> If he was, so what did he actually invent?

> Regards
  Marco Denicolai           
    The first record Of Tesla's high frequency coupled
oscillatory circuit with an air cored transformer is
to be found in patent 454622 of 23 June 1891 under the
title "System of electric lighting". The oscillator
converts low frequency currents into "currents of very
high frequency and very high potential" which then
supplies single terminal lamps. (from Aleksandar
Marincic's CSN preface)
     The arc gap in this schematic is within the tank
circuit, something later abandoned as the best method.
On July 2,1899 Tesla notes the reasoning for this;
     In a schematic showing the break within the tank
circuit he comments... "the scheme of connections has
the disadvantage that the primary discharge current
passes through the break hence, the resistance of the
latter being large, the oscillations are quickly
damped and there is besides a large current through
the break which makes good operation of the latter
difficult. To prolong oscillation in the primary and
increase economy one of the schemes before considered
may be resorted to." He then refers to the
conventional approach of allowing the break to be
shunted across the hv secondary outputs where he
comments.. "in this arrangement the currents through
the break device are much smaller and the oscillations
started by the operation of the break device continue
much longer."
    Tesla makes no comment concerning the idea of
placing an inverse tank circuit on the other side of
the break in the first example for a center tapped
high frequency transformer. In that situation two (180
phased)primaries would recieve their oscillations from
a single arc gap. The problem of the arc containing
the entirety of the currents is then circumvented by
the pathway established along the sides of the newly
configured figure 8 LC quantities. I am still working
to try a NST gap like that. This would be a different
arc gap method. I have given some details trying this
with a dual set of spirals in unfinished letter at
messageboard.
Sincerely HDN
    

=====
Binary Resonant System  http://members3.boardhost-dot-com/teslafy/

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