Summary

Illustration Description

Figure 2589 -- Jules Joubert's step-by-step method of waveform measurement.

This apparatus partially automates the process of graphing the shape of a waveform, by placing a rotating contact on the end of a rotor shaft that touches am adjustable contact around the circumference of the rotor.

The waveform is graphed by moving the adjustable contact and noting the measurement provided by the galvanometer. By plotting these measurements on a scale from 0 to 360 degrees a standing wave can be slowly plotted out, one data point at a time.

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Public Domain Source

• Hawkins Electrical Guide, Volume 6
• Chapter 63: Wave Form Measurement
• Page 1844, Figure 2589
• Copyright 1917 by Theo. Audel & Co.
• Printed in the United States

Upload Notes

• Scanned by User:DMahalko, Dale Mahalko, Gilman, WI, USA -- Email: dmahalko@gmail.com
• Scanned at 600dpi, 8-bit grayscale
• Level-adjusted and cleaned up

See Also

For a list of all these illustrations used in Wikipedia please see the article Hawkins Electric Guide on the English Wikipedia.

Licensing

	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.