March 28, 1881
NOTEBOOK PAGE - TRANSCRIPTION
I have had in my mind for several month past a method of obtaining a record of speech vibrations, and of reproducing the speech from the record so made.
The idea occurred to me while discussing the phonograph, and defects of that instrument, with Mr. Bell, and he seemed to think very highly of it at that time.
This idea together with some others upon the same subject, was noted upon a piece of paper as our note-book was not at hand at the time they occurred to us.
This paper has doubtless been lost or destroyed before this, and I will note the idea here.
Fig. 1. is a plan view of my phonograph (or graphophone) and
Fig. 2 is a [illegible] elevation partly in section.
A - Figs. 1. & 2. is the base of the instrument.
B. is a dovetailed slide fitted into the base.
Noted by Sumner Tainter Mar. 28-1881
ONE OF THE FIVE PAGES
from Charles Sumner Tainter's laboratory notebooks for March 28 and 29, 1881, show the first drawing of the phonograph which they later in that year built.
A working model of the instrument, the first phonograph to use the engraved record was deposited at the Smithsonian Institution in Washington, D. C., to prove priority in the event of a patent suit.