[PT031AAQ], Patent Caveat, Thomas Alva Edison, September 9th, 1888
https://edisondigital.rutgers.edu/document/PT031AAQ
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Title
[PT031AAQ], Patent Caveat, Thomas Alva Edison, September 9th, 1888
Editor's Notes
DRAFT CAVEAT (12 pgs; multiple subjects): phonograph (cutting cylinder grooves); string telephone; putting sound recordings on a thread(?); disk phono (auto regulating for surface velocity) [ie radial velocity]; various recording or reproducing points/diaphragms; governor; phono motor regulation; water motor & governor; glycerine dashpots?; "false shell for big cylinder"; other forms of cylinder "shells"; "wire wound oxidized iron wire armature pressed [illeg] like by hydraulic pressure, ditto short pieces of wire with Sol Ammoniac sol ditto iron turnings, then shellaced or japanned to stop furthuer oxidation; Diaphragms [p. 10] "Mica, Stell, phos benzo, Laminated steel phos bron, brass, glass, celluloid, also hard rubber, shellaced cloth, asphalted cloth, cork,"
Author
Date
1888-09-09
Type
Subject
Folder/Volume ID
PT031AAQ-F
Microfilm ID
113:874
Document ID
PT031AAQ
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University