[LB039169], Letter from Thomas Alva Edison to Edison Machine Works, Samuel Insull, March 24th, 1890
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Title
[LB039169], Letter from Thomas Alva Edison to Edison Machine Works, Samuel Insull, March 24th, 1890
Author
Recipient
Mentioned
Date
1890-03-24
Type
Folder/Volume ID
LB039-F
Microfilm ID
140:883
Document ID
LB039169
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Has Version
Item sets
Transcription
Orange, N.J. March 24, 1890
Samuel Insull, Esq., Gen'l Manager,
The Edison Machine Works,
#44 Wall St., New York City.
Dear Sir:-
I have your letter of 22nd instant, enclosing extract from a letter received by you from Mr. Ward Leonard, with relation to carbon brushes, and in reply would say that I am very much opposed to the use of these brushes, except where it is actually necessary. Good copper brushes with fair attention are the best that can be devised; but, where no attention can be given and load suddenly varies, or where there are ignorant, careless attendants then carbon ought to be used. I have always stated that instead of carbon the German silver connection-wire between commutator and abature is the most perfect device known to stop sparking when load varies.
Yours very truly,
Thos A. Edison
Samuel Insull, Esq., Gen'l Manager,
The Edison Machine Works,
#44 Wall St., New York City.
Dear Sir:-
I have your letter of 22nd instant, enclosing extract from a letter received by you from Mr. Ward Leonard, with relation to carbon brushes, and in reply would say that I am very much opposed to the use of these brushes, except where it is actually necessary. Good copper brushes with fair attention are the best that can be devised; but, where no attention can be given and load suddenly varies, or where there are ignorant, careless attendants then carbon ought to be used. I have always stated that instead of carbon the German silver connection-wire between commutator and abature is the most perfect device known to stop sparking when load varies.
Yours very truly,
Thos A. Edison