[PT032AAY], Patent Application, Thomas Alva Edison, May 22nd, 1888
https://edisondigital.rutgers.edu/document/PT032AAY
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Metadata
- Title
- [PT032AAY], Patent Application, Thomas Alva Edison, May 22nd, 1888
- Editor's Notes
- Pat. App. 400,646 Objective is to produce a diaphragm for the recorders and reproducers of phonographs, one which will maintain its adjustment and give maximum effect under various condition. Employing a film or membrane of glass or its equivalent porcelain as the diaphragm the difficulties encountered are overcome. [1 fig; 4 claims] Becomes US Pat. 400,646
- Author
- Edison, Thomas Alva
- Date
- 1888-05-22
- Type
- Patent Application
- Folder ID
- PT032AAY-F
- Microfilm ID
- 114:331
- Document ID
- PT032AAY
- Publisher
- Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
- Has Version
- Archive.org Viewer, Microfilm Series Reel 114