[NM017AAG2], Technical Note, Thomas Alva Edison, April 1st, 1882


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[NM017AAG2], Technical Note, Thomas Alva Edison, April 1st, 1882

Editor's Notes

Instructions to Dyer for drafting US & Brith Erwy pats if D thinks necessary. Discusses what essential points should be: slowing train by use of resistance in main circuit (says neither he nor siemens has provision for slowing train); double-wound field magnets so when running slow with heavy load the armature won't draw too much current from magnets (winding of coarse wire to be switched in and out as needed). "Did Siemens take current off of more than one wheel? I think not. I remember I had another US application where this was shewn--get this & take what is good out of it for the new English." Proposes putting pinion gear on shaft to mesh into large gear on main shaft---"I wonder if we couldn't get a combination claim of belts, friction clutch or equivalent disconnecting (?) mechanism. Have we in any of our cases spoken of nickel plated ends of rails, nickel plated fish plates---also Japanned rails?" {probably late June/early July see US Pat 339,278 and also 273,490}
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Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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