[X128B054], Technical Note, John F Ott, Thomas Alva Edison, September 12th, 1886

Item

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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."

Date

1886-09-12

Decade

1880-1889

Subject

Identifier

X128B054

Folder Set

X128B-F

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University