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which was soon manufactured West Orange. 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. 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. The work on
the latter was vital part the evolution amusement
phonograph. The late 1889 model phonograph had one holder be
used for either the reproducer recorder instead the
spectacle arrangement. This included
designing wooden cabinet for the machine and developing a
recorder/reproducer assembly suitable for music. Now the laboratory staff could design
reproducers and recorders different weight which gave them
the flexibility improve the reproducer. The reproduction of
.
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 spectacle with two diaphragms was replaced a
single dual purpose recorder/reproducer. Edison applied for patent November 1889 which
incorporated many the improvements made during that busy
year
