[MB076], Letter from Thomas Alva Edison to Charles Batchelor, August 31st, 1882
https://edisondigital.rutgers.edu/document/MB076
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- Title
- [MB076], Letter from Thomas Alva Edison to Charles Batchelor, August 31st, 1882
- Editor's Notes
- SELECT THIS AUTOGRAPH DOC. "Latest dodge carbonizing: W are using carbon forms & weights for holding fibreas instead of nickel and are getting even better carbons. I will send you a sample by mail of complete form & weight so you can make dies & punch. They are pressed in screw press little larger than ours. Use ground gas retort carbon mixedwith minimum quantity of crute [-----] thinned slightly by kerosene or crude coal tar. Puta little more pressure than we did on chalks then lay forms [--] on flat iron plate & bake very [--] up to say 400 or 500 Fahr so they dont shatter & warp then put them in your carbonziing covers and bring up the same as you would fibers in nickel forms ie, just as slow then stop you are OK & will never have any more trouble about melting forms, etc. We have run over 50 heats with them & they actually improve. Another thing we do use double covers thus:" [drawing]. Continues a bit, then says he's ordered Upton to send drawings of new furnaces. Pre-carbonizing expt with carbons. Suggests experiment with forms. Signed Edison.
- Author
- Edison, Thomas Alva
- Recipient
- Batchelor, Charles
- Mentioned
- Upton, Francis Robbins
- Date
- 1882-08-31
- Type
- Letter
- Folder ID
- MB05-F
- Microfilm ID
- 92:442
- Document ID
- MB076
- 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 92