File:Large Apps-Spottiswoode induction coil.png
From Wikimedia Commons, the free media repository
Jump to navigation
Jump to search
Size of this preview: 800 × 428 pixels. Other resolutions: 320 × 171 pixels | 640 × 343 pixels | 1,024 × 548 pixels | 1,475 × 790 pixels.
Original file (1,475 × 790 pixels, file size: 426 KB, MIME type: image/png)
File information
Structured data
Captions
Summary
[edit]DescriptionLarge Apps-Spottiswoode induction coil.png |
English: A large induction coil made in 1877 by British instrument maker Alfred Apps for British scientist William Spottiswoode. One of the largest induction coils ever constructed, it could produce a spark 42 inches (106 cm) long, corresponding to a voltage of roughly 1,200,000 volts. It was 44 in. in length, 20 in. in diameter, mounted on 3 insulating wood posts. This drawing shows the coil only; the interrupter, capacitor and liquid batteries needed to generate the primary current are not shown. Its primary winding, seen extending from the ends of the secondary coil, consisted of 1344 turns of .096 in. copper wire wound on a 3.56 in. core made of parallel iron wires. There were actually two primary windings, which could be exchanged; the other was for higher current work. The secondary consisted of 280 miles of wire wound in 341,850 turns. Powered with 5 quart-sized liquid Grove cells, it gave a spark of 28 in., with 10 cells 35 in. and with 30 cells 42 in. Information from William Spottiswoode, "Description of a large induction coil". The London, Edinburgh, and Dublin Philosophical Magazine, Vol. 3, No. 15, Jan 1877, p. 30. Image alterations: cropped out caption. |
Date | |
Source |
|
Author | William Spottiswoode |
Licensing
[edit]Public domainPublic domainfalsefalse |
This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
|
||
This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
|
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 15:52, 3 May 2021 | 1,475 × 790 (426 KB) | Materialscientist (talk | contribs) | FFT | |
10:35, 20 May 2012 | 1,475 × 790 (407 KB) | Chetvorno (talk | contribs) |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
File usage on other wikis
The following other wikis use this file:
- Usage on ca.wikipedia.org
- Usage on de.wikipedia.org
- Usage on en.wikipedia.org
- Usage on es.wikipedia.org
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Horizontal resolution | 28.35 dpc |
---|---|
Vertical resolution | 28.35 dpc |
File change date and time | 15:52, 3 May 2021 |