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[MBSB21358], Letter from Francis Robbins Upton to Scientific American, November 11th, 1879

Title: [MBSB21358], Letter from Francis Robbins Upton to Scientific American, November 11th, 1879
Editor's Notes: Reply to Seeley's letter to SciAm on issue of internal/external dynamo resistance. Main point of contention seems to be whether decreasing armature resistance increases proportion of energy wasted in friction & heating, lowering overall efficiency. Upton claims tests show otherwise; Edison's "machine is so made that it would be impossible to use it with the same resistance outside as inside, as it would heat the wire on the armature so as almost to burn it, by carrying a current so much in excess of that for which it was intended." But TAE still withholding full details.
Author: Upton, Francis Robbins
Recipient: Scientific American
Mentioned: Seeley, Charles A; Edison, Thomas Alva
Date: 1879-11-11
Type: Letter
Subject: Dynamos and generators; Electricity and magnetism
Folder ID: MBSB2-F
Microfilm ID: 94:530
Document ID: MBSB21358
URL: https://edisondigital.rutgers.edu/document/MBSB21358
Rights: Thomas Edison National Historical Park
Publisher: Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Has Version: Archive.org Viewer, Microfilm Series Reel 94
License: CC0 1.0 Universal

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