346 The press was hydraulically
operated and could accommodate one disc time.350 The standard operating procedure the Edison
Phonograph Works was make working masters actually press discs and save
the original submasters and matrices archival copies. This would give rough date 1910 1911 the
time the installation the press, because production disc records the
factories did not begin until 1913.
Although the most important project carried out the phonograph business was
the new disc product, should not forgotten that Edison dearly loved the
cylinder format and continued experimental work throughout this period.
A Robertson disc press was set opposite the condensite mixer press master
records unto blanks and make copies (figure 34).349
The product this plating process was negative, matrix, the master.
Building would therefore still have evidence work the cylinder and the
equipment make copies prerecorded masters and test them.
The working disc masters that were used this press were also produced in
Building Again, the purpose the laboratory was establish the procedures
and make the equipment and then thoroughly test the device before handing it
over the production staff. This
was used make submaster which turn was used produce working
master.)
347 Frank Dyer Smith, March 23, 1910, Record Manufacturing Division Records, Box 16.were also kept secret this time, for fear that they might give Baekeland idea
of what the West Orange laboratory was to.347 (See for more Jonas
Aylsworth. This working master could used stamp out hundreds copies the
original master disc. new master could easily
slid into the top part the press.
The practice Edison’s laboratory was set and test equipment before was
installed the factories.
350 Historian’s Note 128.
348 John Robertson and Company Edison Phonograph Works, Purchasing Department, December 11,
1914 (in 1914, WOL-Fire).
348 Historian’s Note 90. The electroplating equipment used make masters
and submasters was installed Building 1910. This machine could also press out variety of
other forms made from condensite. There were also
103
