[MU120], Letter from Thomas Alva Edison to Francis Robbins Upton, December 1887
https://edisondigital.rutgers.edu/document/MU120
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Title
[MU120], Letter from Thomas Alva Edison to Francis Robbins Upton, December 1887
Editor's Notes
"There are two ways of stopping this. 1st reversing lamp on pump--or heating clamp by a flame after it is perfectly dry. Reversing lamps for an instant would probably be better = as at right C.P. The clamp is brought to red or white heat almost instantly--Baking the lamps for 1/2 hour at 800 or even 750 ought to carbonize the geletin in the paste. Force [unclear] he touches the clamp with a flame but I consider this a dangerous practice, on the whole 9 advise that when you reach such an exhaustion as to work the lamp up high to heat the lamp that you alternate [unclear] instant on 1 clamp the other on the next arm this way work out [unclear] on 6 other [unclear] their work blue off on out clamp only a very simple plain switch could be made or you could work a whole row and work high then reverse the whole row + work high this would dispense with many switches."
Supplied year and month
Author
Recipient
Mentioned
Date
1887-12-00
Type
Subject
Folder/Volume ID
MU10-F
Microfilm ID
95:836
Document ID
MU120
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University