File:454622.png

Page contents not supported in other languages.
This is a file from the Wikimedia Commons
From Wikipedia, the free encyclopedia

454622.png ‎(481 × 428 pixels, file size: 41 KB, MIME type: image/png)

Summary

Description
English: U.S. Patent 0,454,622 - System of Electric Lighting - 1891 June 23 - Apparatus devised for the purpose of converting and supplying electrical energy in a form suited for the production of certain novel electrical phenomena, which require currents of higher frequency and potential. It specifies an energy storage capacitor and discharger mechanism on the primary side of a radio-frequency transformer. This is the first-ever disclosure of a practical RF power supply capable of exciting an antenna to emit powerful electromagnetic radiation.
Date


(patent filed april 1891 http://www.google.com/patents?id=wmBOAAAAEBAJ&printsec=abstract&zoom=4&source=gbs_overview_r&cad=0#v=onepage&q&f=false
Source Originally uploaded at http://peswiki.com/index.php/Image:454622.png
Author Nikola Tesla
Permission
(Reusing this file)
Public domain The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted. See 37 CFR 1.71(d), 37 CFR 1.84(s)

The original patent contains no such notice, so its contents are in the public domain. Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}}.

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:454622.png

Original upload log

date/time username resolution size edit summary
10:44, 27 May 2007 w:en:User:Reddi 481×428 41 KB Originally uploaded at: http://peswiki.com/index.php/Image:454622.png ==Description== U.S. Patent 0,454,622 - System of Electric Lighting - 1891 June 23 - Apparatus devised for the purpose of converting and supplying electrical energy in a form suite

Image description page history

link date/time username edit summary
[1] 21:06, 11 January 2008 w:en:User:Vox Rationis
[2] 22:00, 28 December 2007 w:en:User:Liftarn
[3] 10:45, 27 May 2007 w:en:User:Reddi
[4] 10:44, 27 May 2007 w:en:User:Reddi (Originally uploaded at: http://peswiki.com/index.php/Image:454622.png ==Description== U.S. Patent 0,454,622 - System of Electric Lighting - 1891 June 23 - Apparatus devised for the purpose of converting and supplying electrical energy in a form suited )

Captions

Add a one-line explanation of what this file represents

Items portrayed in this file

depicts

inception

23 June 1891Gregorian

MIME type

image/png

checksum

c8ea949f450ddcbd3ec814819e8fd0fec490c2d3

determination method: SHA-1

data size

41,837 byte

height

428 pixel

width

481 pixel

File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeThumbnailDimensionsUserComment
current03:53, 15 January 2008Thumbnail for version as of 03:53, 15 January 2008481 × 428 (41 KB)BetacommandBot Transwiki approved by: w:en:User:Vox Rationis {{Information |Description={{en|Originally uploaded at: http://peswiki.com/index.php/Image:454622.png ==Description== U.S. Patent 0,454,622 - System of Electric Lighting - 1891 June 23 - Apparatus de
The following pages on the English Wikipedia use this file (pages on other projects are not listed):

Global file usage

The following other wikis use this file:

Retrieved from "https://en.wikipedia.org/wiki/File:454622.png"