[N317101], Technical Note, Thomas Alva Edison, April 13th, 1886


View document with UniversalViewer   → View document on Archive.org  → Re-use this digital object via a IIIF manifest


[N317101], Technical Note, Thomas Alva Edison, April 13th, 1886

Editor's Notes

p. 101 "Device for automatically indicating depth water on steamers continuously also an alarm by gal needle swinging to a stop & closing bell ckt (drawing); p. 103 "Testing quality & homogeneity & for flaws of steel or Iron stafts (drawing) Compass recd on a Torsion slides along near shaft if shaft homogenous the Zero point will be constant if a flaw there will be a consequent pole & produce a dip in the curve There are many variations possible here"; p. 105 drawing "Expansion Engine principle Hydraulic press big cylinder full copper tubes very thin & 1/32@1/64-- 3/16 bore cylinder 15 inches dia of copper heavy copper ends-- 2 feet long-- Hot water 212 let up in then run back into hot boiler & cold let thro & so on all auto= Bi Sul Carbon or another good expansible liquid to be used"; p. 107 drawing "Expansion Engine Hot & cold H2O passed alternately through the multiple pulley engine



Folder/Volume ID


Microfilm ID


Document ID



Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Download CSV | JSON