Re: [usa-tesla] Radio, history; and neat free site
- Mahlon Loomis not Mahlon Lewis though. Loomis was
granted U.S. patent number 129,971 on July 30, 1872
for an "a new and Improved Mode of Telegraphing and of
Generating Light, Heat, and Motive Power".
--- Wallace Edward Brand <webrand@...>
> Marconi's initial patent for a two circuit system__________________________________________________
> was no different than
> Hertz's experimental apparatus except for a coherer
> instead of a spark
> gap. The coherer had been invented by someone else.
> The device was
> inadequate as a radio system. The distance it
> covered was only a few miles
> and there was too much interference with other
> transmitters. An earlier
> patent for basically the same apparatus had been
> filed by a Virginia
> dentist named Mahlon Lewis.
> It was the four circuit system (two circuits in the
> transmitter and two in
> the receiver) that ultimately became the basis for
> radio and TV as we know
> it. This was invented and patented by Tesla.
> Marconi's patent of this
> system was invalidated by the courts because of
> Tesla's prior art. The
> initial decision in which all the facts are
> discussed was in an opinion of
> the US Court of Claims on a claim by Marconi that
> his intellectual property
> had been taken by the US for use in World War I.
> The Court of Claims
> decision was affirmed by the US Supreme Court in
> 1943 just about the time
> of the Battle of the Solomon Islands so it got very
> little press coverage.
> Wallace Edward Brand
> Herzog wrote:
> > This Week's SW
> > Please note: You can receive the SW Bulletin free
> by Email each week.
> > Simply transmit SUB BULLETIN as the subject of
> > an Email message to request@...
> > Physics:
> > On the Discovery of
> Electromagnetic Waves
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