The major design consideration this type motor
was constant speed because the slightest variation speed
distorted sound reproduction.
As each power source alternative was tried and found
wanting, Edison intensified his efforts the battery and
electric motor format." Many the mechanical defects
of the machine had been eliminated, but there still remained
two more important problems solved: the power source and
the wax the cylinder. The primary battery then use was an
electro-chemical cell which required replacement the
chemicals once the electricity was discharged.IV-17
defects his phonograph but they were being remedied "as fast
as human flesh can stand it. This problem defied solution in
the 1880s. This problem started
Edison series researches which eventually led the
creation new primary battery. The laboratory staff developed several alternate
methods running the machine, including spring motors, and
among the different designs actually manufactured the 1890s
29
was treadle-driven model and water-powered phonograph. One alternative this format was an
electric motor powered current from electric lighting
circuits. had get
more power from the primary batteries use because their
charge ran down very quickly and presented the user with an
expensive and messy replacement process.
. The former produced constant flow of
complaints; the battery and electric motor combination were
totally unsuitable for office use since the battery was
unreliable and expensive
