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