The Phonogram (1902-08)

Page scan 00013 from The Phonogram

Record Details:

Title:
The Phonogram
Date:
1902-08
Volume:
The Phonogram (II), Issue 28
Leaf #:
00013
Language:
English
Subjects:
honograph,"Phonograph History, Thomas Edison","National Phonograph Company","Sound Recording History
Collection:
Recorded Sound
Coordinator:
Media History Digital Library
Date Added:
July 20, 2022
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< 58 THE PHONOGRAM into the moulds. The tables are constantly rotated, thus bringing the moulds, which cool very rapidly, round to the workers on the opposite side of the table, where the cylinders are removed. The moving table brings the moulds back to the starting point, where they are again filled from the pouring can. The cylinders are cast with an in- terior spiral thread, which adds some- what to the strength of the cylinder, and forms the bearing surface when the Record is placed on the mandrel of the Phonograph. After they have cooled, the cylin- ders are first reamed out to gauge, then edged and rough-turned, and given a finishing cut, the final turn- ing being done with a fine sapphire knife. The Blanks are then in- spected. Those that show the least