[D8326N], Letter from Charles Schenck Bradley to Thomas Alva Edison, July 22nd, 1883
https://edisondigital.rutgers.edu/document/D8326N
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Metadata
- Title
- [D8326N], Letter from Charles Schenck Bradley to Thomas Alva Edison, July 22nd, 1883
- Editor's Notes
- How would it do to take some iron from the large pole pieces on the large dymamo to prevent the sparking of Brushes [drawing]? Suggests that there's a short in the magnetic circuit between tips of pole pieces that "develops a tension between any two armature bars as they come opposite, and this being the location of the brushes on the commutator produces sparking." Expounds somewhat on this theory; thinks the new H machine gives proof of its correctness. Suggesting that pole pieces come to a point in order to concentrate lines of force [which he argues happens in the small machines by the high speed of rotation.] You amy have thought of this long ago but yu have too many duties to give it real thought. TAE marg: "Say to B that it would be troublesome and costly to do Am tryting yo do it with brushes themselves"
- Author
- Bradley, Charles Schenck
- Recipient
- Edison, Thomas Alva
- Date
- 1883-07-22
- Type
- Letter
- Folder ID
- D8326-F
- Microfilm ID
- 66:680
- Document ID
- D8326N
- Publisher
- Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
- Has Version
- Archive.org Viewer, Microfilm Series Reel 66