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| == Marconi's Early Wireless Experiments, 1895 == | | {{Milestone box |
| | |Dedication=46 |
| | |Special citation=No |
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| | This Milestone has been revoked. |
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| Salvan, Switzerland - 26 September 2003 - [[IEEE Switzerland Section History|IEEE Switzerland Section]]
| | [[Category:Communications]] |
| | | [[Category:Radio_communication]] |
| [[Image:Marconi's Early Wireless Experiments use this one for actual milestone page.jpg|thumb]]
| | [[Category:Telegraphy]] |
| | | [[Category:Wireless_telegraphy]] |
| ''On this spot in 1895, with local assistance, [[Guglielmo Marconi]] carried out some of the first [[Wireless Telegraphy|wireless]] experiments. He first transmitted a signal from this "Shepherdess Stone" over a few meters and later, following one and a half months of careful adjustments, over a distance of up to one and a half kilometers.
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| This was the beginning of Marconi´s pivotal involvement in wireless radio.''
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| '''The plaque can be viewed in the town of Salvan, Switzerland, attached to the famous Shepherdess Stone.'''
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| The village of Salvan, Switzerland was known in the last years of the 19th century as a health resort. Located in the southwest of Switzerland in the Swiss Alps, very close to the France border, it was accessible only by a narrow mule path, nicknamed "route de Mont". Marconi, at the age of 21, visited Salvan in the Summer of 1895. It was suggested that he visited the resort to treat a respiratory ailment.
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| Marconi's equipment consisted of a [[Batteries|battery]], a Ruhmkorff induction coil, a Righi spark generator and an antenna. His goal: transmit a signal without a metallic connection. He set up his experiments on Pierre Bergère (the Shepherdess Stone). Marconi was operating the transmitter, and a young assistant*, a resident of Salvan, began to move the receiver, which sounded a bell, farther away. First the distance was approximately four or five meters. The final distance in which the experiment worked was approximately one and a half kilometers. Each time the bell sounded the young assistant would hold up a red flag; when it did not he would hold up a white flag. (The accounts of the actual distance vary.) These experiments continued for several weeks.
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| Marconi only spent a short time in Salvan, then returned to Italy. The following year he filed the original patent on his invention in London.
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| Much of this information was obtained some 70 years after the event, from the young assistant, Maurice Gay-Balmaz, who was 10 years old at the time of the experiment.
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| <div class="header"><span class="head1">INNOVATION</span><span class="head2"> MAP</span></div>
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| <!-- Marconi --> <googlemap version="0.9" lat="47.251132" lon="7.829732" zoom="10" width="300" height="250" controls="small">
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| 47.251132, 7.829732,
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| Marconi's Early Wireless Experiments, 1895
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| Salvan, Switzerland
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| </googlemap>
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| [[Category:Communications|{{PAGENAME}}]] | |
| [[Category:Radio_communication|{{PAGENAME}}]] | |
| [[Category:Telegraphy|{{PAGENAME}}]] | |
| [[Category:Wireless_telegraphy|{{PAGENAME}}]] | |
