The electroplating equipment shown this
table represents the method Edison devised make numerous duplicates of
master recordings.
VACUUM PUMP (on table) Figure 29.
KNIFE, sharp (on table) Used trim "flash," pieces
of material protruding over
the edges the mold.
ELECTROPLATING
DEVICE (on table)
Figure 29.
MOLDS, one copper-plated
and one copper-master (next
to wax master)
Complements artifact.
Acquire. The master
was first copper plated, and then nickel plated top this thin layer form a
durable surface. Use EDIS 376. The wax was removed and the surface cleaned. The result was a
perfect negative impression the recording groove, called matrix. Attach vacuum pump.
208
.
EDIS collection reproduce. Use EDIS 2077.
GRAPHITE (in six glass jars) Used plating.
TOOTHBRUSHES, Used plating.
The plating was done hard rubber baths with anodes inside them.
Al Wurth was the electroplating expert the laboratory and would have
supervised this work. the
production process thin layer graphite was brushed onto the wax master. Use E-159-5. The cylinder disc was placed inside vacuum and
small particles gold "spluttered" while the disc cylinder revolved. Use EDIS 23181 (copper
plated mold) and EDIS 24845
(copper master mold).Table Electroplating Records.
BRUSHES, (on table) Used clean wax from
copper surface. This was
used the record press make duplicates. Use EDIS 14425 through
14428.
Both these methods gave the surface the disc electroconductive surface. Use EDIS 14330 through
14335. This equipment for disc records was successor the method
of gold plating cylinder masters that had been successfully developed the
laboratory from 1888-1903.
WAX MASTER (in
electroplating device)
Complements artifact.
Object and Location Evidence Recommendation
Table 2
LAB TABLE (in place) Figure 29
