[NS79AAG1], Patent Application, Thomas Alva Edison, July 17th, 1879
https://edisondigital.rutgers.edu/document/NS79AAG1
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Metadata
- Title
- [NS79AAG1], Patent Application, Thomas Alva Edison, July 17th, 1879
- Editor's Notes
- Undated draft of patent 231,704. Receiver is same as previous except it's placed in tertiary circuit "to keep the apparatus free from earth currents which cause alteratios in the volume of sound owing to the marvellous delicacy of the apparatus." Claims method of connecting buttons to circuit; rubber transmitter cover; use of primary & secondary coils in transmitter; receiver's palladium-tipped pressure arm; call battery; receiver. [Receiver tertiary circuit not in claims of this draft.]
- Author
- Edison, Thomas Alva
- Mentioned
- Serrell, Lemuel Wright
- Date
- 1879-07-17
- Type
- Patent Application
- Subject
- Acoustic telegraphy
- Folder ID
- NS79-F
- Microfilm ID
- 162:714
- Document ID
- NS79AAG1
- Publisher
- Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
- Has Version
- Archive.org Viewer, Microfilm Series Reel 162
- License
- CC0 1.0 Universal