[X128B054], Technical Note, John F Ott, Thomas Alva Edison, September 12th, 1886
https://edisondigital.rutgers.edu/document/X128B054
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Title
[X128B054], Technical Note, John F Ott, Thomas Alva Edison, September 12th, 1886
Editor's Notes
drawing "Combination call and receiver for Telephone, or District call. The leaver to be raised up and lowered when sending a signall or call, and lowered when receiving, to bring steel magnet in contact with Iron core and not let ball rest on diaphragm, only when finished."
Author
Date
1886-09-12
Type
Subject
Folder/Volume ID
X128B-F
Document ID
X128B054
Rights
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University