Demand for the patent named
"Multiple telegraphy" Pupin made on 23.2.1894.
In explenation said that it is about distribution of the
electrical energy which enables sending many messages
on the same time in one transmitter, by periodical currents.
Because of the fact that two more scientists made same
patetnts on the same discovery, the whole thing ended
up on court. This proces lasted for 8 years and financialy
almost destroyed Pupin. In the end, he did won and on
12.8.1902, he announced his invention by the number 707007.
His most signifficant invention Pupin announced 19.6.1900. by the number 652230. |
This invention is about improving the
long distance transmission of the phone comunication.
It is announced as “Technics
of lowering of the electrical waves and machines for it”,
today known as the Pupinisation, it marked the revolution
in phone-transmissions on long distance.
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The line on which Pupin experimentally proved his theory of transmitting the phone sygnals on long cables
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Phone cables with Pupin's reels
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Putting his famous reels on the precisely
determinated spots in phone-cables, Pupin made lower the
weakening of the phone currnts and made possible connecting
people on the continents. The right of using this invention
bought many companys as "Siemens-Halske"and
"Philips".
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The first phone cables with Pupin's reels
were put in Europe in 1902, from Berlin to Postdam, which
means 32 km. Since then, the net of the Pupin's cables
started to spread around all continents. Thanks to huge
practical application of his inventory, Pupin became rich,
and he invested most of his money in his new experiments.
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The start of the pupinisation
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| Since 1894. till 1923, Pupin
announced 24 patents in America. His important discoveries
are also: machines for phone and telegraph transmission,
wireless transmitting system, the electric coordinator
and sound generator. |
