[MBN002046], Technical Note, Charles Batchelor, November 9th, 1877
https://edisondigital.rutgers.edu/document/MBN002046
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Metadata
- Title
- [MBN002046], Technical Note, Charles Batchelor, November 9th, 1877
- Editor's Notes
- found plumbago-saturated silk fluffs shakes out and substituted silk cloth covered both sides with paste of plumbago and dextrin; cut in discs and a number put in holder; resistance of circuit altered by pressing them together and opening them out again; however, deteriorated by going flat and loosing spring; TAE found plumbago does not alter resistance by pressure as thought but due to better contact under pressure thus decided to use hard fluffs of plumbago combined with other materials; best combination is 1 gram lampblack, 250 mg rubber dissolved in bisulphide carbon; rubber and mica diaphragms; also describes other designs;
- Author
- Batchelor, Charles
- Mentioned
- Edison, Thomas Alva
- Date
- 1877-11-09
- Type
- Technical Note
- Folder ID
- MBN002-F
- Microfilm ID
- 90:680
- Document ID
- MBN002046
- Publisher
- Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
- License
- CC0 1.0 Universal
- Has Version
- Archive.org Viewer, Microfilm Series Reel 90
- Item sets
- [MBN002-F] Cat. 1317 (1875-1878)