[D8944AAN], Letter from Thomas Alva Edison to Henry Villard, October 18th, 1889

Item

Abstract

[This is Edison's draft of LB033174A 891018] Henry Villard Presdt Dear Sir The trouble in the Sprague armature is not due to the winding.##Previously the burning out##troubles occurred in the field magnet and not in the armature to rectified this trouble. Copper [babbins?] placced in the iron magnet was adapted. This diminished the Counter Electromotivve forcce at any one moment so derived from the charge or disccharge of the magnet that the disruptive charge was prevented, But it was this very change which saved the armature and now being done away with the whole of the current comes to the armature like a cannon ball unchecked by the back current of the field the consequence is that with heavy loads on grades the armature must been out even if wound with absolute perfection. Yours Truly TAE

Recipient

Date

1889-10-18

Decade

1880-1889

Type

Identifier

D8944AAN

Folder Set

D8944

Title

[D8944AAN], Letter from Thomas Alva Edison to Henry Villard, October 18th, 1889

Microfilm ID

78:534

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University