Although
the promotional literature for the business phonograph claimed
that had correction device and repeat function, these
important features were add-ons the existing machine rather
than new design begun with these goals mind. Nelson Durand
insisted modifications the machine and engineering work
to meet the needs the user.320)
Holland's work the West Orange laboratory covered all
parts the Edison dictating system: developed new
reproducers, designed many different machines (including a
spring driven portable machine), and produced range of
controls. The input from the marketing force was an
important determinant the focus his work.
The correction device was major selling point the
marketing dictating machine; the difficulty making
corrections provided great deal sales resistance.
The correction device was still the clumsy scale and marker on
the cylinder. 1911 the
only significant change the design the machine was the
introduction steel case and improved electric motor. This led years R&D the
design sturdy recording/reproducer assembly which would
not break with use, and the development correction
feature. The improved dictating machine 1912 came
. Despite the long delays, which were compounded by
Durand's constant interference development work, new
business designs were slowly introduced onto the market 1911
and 1912.XI- 6
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