Edison applied for patent November 1889 which
incorporated many the improvements made during that busy
year.
Edison's commitment the single-user business market in
his 1887-1889 patents shown his emphasis speaking and
listening tubes rather than horns which provided means of
acoustic amplification. The reproduction of
. Now the laboratory staff could design
reproducers and recorders different weight which gave them
the flexibility improve the reproducer.IV-21
which was soon manufactured West Orange. The work on
the latter was vital part the evolution amusement
phonograph. The spectacle with two diaphragms was replaced a
single dual purpose recorder/reproducer. Yet soon the feedback from the
local companies indicated that there was market for an
amusement phonograph, Edison began consider the design a
phonograph for entertainment use the home. also featured an
improved start/stop control and shaver mechanism which removed
the groove from the cylinder, enabling more than one recording
to made. (Illus. This included
designing wooden cabinet for the machine and developing a
recorder/reproducer assembly suitable for music. The late 1889 model phonograph had one holder be
used for either the reproducer recorder instead the
spectacle arrangement. 4-3, #9218)
The coin-in-the slot phonograph was highly successful: it
attracted attention, increased user familiarity with the
machine, and maintained steady level sales which provided
much needed work for the laboratory
