[D7929ZBD], Letter from Lemuel Wright Serrell to Thomas Alva Edison, April 8th, 1879
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Title
[D7929ZBD], Letter from Lemuel Wright Serrell to Thomas Alva Edison, April 8th, 1879
Editor's Notes
Re: Phono case 174. Pat Office says flywheel used to obtain uniform motion isn't an invention. Extensive marg: "You can tell Patent Of that if they desire to throw out the claim they may do so, but that it cost a large amount of money & expense to develop the fact that the infinitessimal friction of the shaft produced wrong intonations of the voice which was corrected by an abnormally heavy flywheel....." [continues; large mass needed to make phono work well, while other applications use wind vane or other means of uniform motion.....]
Author
Recipient
Date
1879-04-08
Type
Folder/Volume ID
D7929-F
Microfilm ID
51:459
Document ID
D7929ZBD
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University