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[NS7704ZAW], Technical Note, Thomas Alva Edison, James Adams, May 19th, 1877

Title: [NS7704ZAW], Technical Note, Thomas Alva Edison, James Adams, May 19th, 1877
Editor's Notes: sexty, 4pp.: relay lever details, modified dpdr plus "pen"??; pressure relay plus dpdr & fancy relay; 3 level; brkwheel for ?
Author: Adams, James; Edison, Thomas Alva
Date: 1877-05-19
Type: Technical Note
Subject: Multiple telegraphy (duplex, quadruplex)
Folder ID: NS7704-F
Microfilm ID: 7:595
Document ID: NS7704ZAW
URL: https://edisondigital.rutgers.edu/document/NS7704ZAW
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 7
License: CC0 1.0 Universal