File:TeslaBifilar.png

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TeslaBifilar.png (449 × 375 pixels, file size: 48 KB, MIME type: image/png)

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English: Bifilar coil in Nikola Tesla's United States patent 512,340 of 1894. Tesla explains that in some applications (which he does not specify) the self-inductance of a conventional coil is undesired and has to be neutralised by adding external capacitors. The bifilar coil in this configuration has increased self-capacitance, thereby saving the cost of the capacitors. It is notable that this is not the kind of bifilar winding used in non-inductive wirewound resistors where the windings are wired anti-series to null out self-inductance. It's also interesting to note that Tesla's bifilar coil is used in John Bedini's permanent back emf motor which are (alleged) overunity motors with open loop circuts. For more information see John Bedini.
Date - Upload:
Source United States patent 512,340 - Transferred from en.wikipedia to Commons by Wdwd using CommonsHelper.
Author Nikola Tesla - First Uploader was Reddi at en.wikipedia
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May or may not be in the public domain
 In general, the contents of United States patents are in the public domain.

In specific cases, patent applicants and holders may claim copyright in portions of those documents. In those specific cases, applicants are required to identify the portions that are protected under copyright, and are additionally required to state the following within the body of the application and patent (see 37 CFR 1.71(d) & (e) and 37 CFR 1.84(s), and MPEP § 608.01(e) & (w) and MPEP § 1512):

A portion of the disclosure of this patent document contains material which is subject to (copyright or mask work) protection. The (copyright or mask work) owner has no objection to the facsimile reproduction by any­one of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all (copyright or mask work) rights whatsoever.

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Original upload log

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The original description page was here. All following user names refer to en.wikipedia.
  • 2007-05-27 02:27 Reddi 449×375× (102868 bytes) Bifilar coil in Nikola Tesla's United States patent 512,340 of 1894. Tesla explains that in some applications (which he does not specify) the self-inductance of a conventional coil is undesired and has to be neutralised by adding external capacitors. The

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Date/TimeThumbnailDimensionsUserComment
current21:52, 25 September 2016Thumbnail for version as of 21:52, 25 September 2016449 × 375 (48 KB)Cmdrjameson (talk | contribs)Compressed with pngout. Reduced by 52kB (51% decrease).
10:18, 16 July 2011Thumbnail for version as of 10:18, 16 July 2011449 × 375 (100 KB)File Upload Bot (Magnus Manske) (talk | contribs) {{BotMoveToCommons|en.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{en|Bifilar coil in Nikola Tesla's United States patent 512,340 of 1894. Tesla explains that in some applic

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