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File:Marconi capacity area transmitter 1896.png

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Summary

Description
English: A spark gap radio transmitter invented by radio pioneer Guglielmo Marconi in 1895 and patented 1896 (US patent 586193, G. Marconi, Transmitting electrical signals, filed 7 December 1896, granted 13 July 1897) during his development of the first long-range radiotelegraphy communication system. It is a modification of Heinrich Hertz's dipole transmitter to give greater range. The 3 spark gaps in series were called a Righi spark gap. Marconi's innovation is the addition of "capacity areas" (r), two large metal sheets to add capacitance to the antenna, so it will store more charge, increasing the output power. It was not commercially successful; the range of the transmitter was still less than one-half mile, but it established the important principle that increasing the capacitance of the antenna increased the range.
Date
Source Retrieved February 9, 2018 from Charles Grinnell Ashley, Charles Brian Hayward (1912) Wireless Telegraphy and Wireless Telephony: An understandable presentation of the science of wireless transmission of intelligence, American School of Correspondence, Chicago, IL, p. 30, fig. 14 on Google Books
Author Charles Grinnell Ashley and Charles Brian Hayward

Licensing

Public domain
This work is in the public domain in the United States because it was published (or registered with the U.S. Copyright Office) before January 1, 1929.

Public domain works must be out of copyright in both the United States and in the source country of the work in order to be hosted on the Commons. If the work is not a U.S. work, the file must have an additional copyright tag indicating the copyright status in the source country.
Note: This tag should not be used for sound recordings.PD-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Marconi_capacity_area_transmitter_1896.png

Captions

Marconi 1895 experimental spark radio transmitter

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Date/TimeThumbnailDimensionsUserComment
current23:44, 9 February 2018Thumbnail for version as of 23:44, 9 February 2018676 × 581 (38 KB)ChetvornoUser created page with UploadWizard

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