[D8123ZAZ], Letter from Francis Robbins Upton to Thomas Alva Edison, April 18th, 1881

Item

Abstract

Dr. Haid has not yet furnished the treated plumbago loops although he promises them daily. Achison has perfected a system to do this and has already turned out 5000; wants to come to factory to learn how to make lamps so that he can go into business in France. Upton wants to stop making lamps for time being so that they can concentrate on making A and B carbons. Has enough fiber on hand to keep running for at least 4 months. Upton also reports an accident during vacuum pumping of lamps, ruining about 150. Accident due to wires Nichol ran which failed b/c leaky steam valve causing short. "[S]carcely a day passes without a new 'bug' showing itself." However, has turned out about 1000 lamps with good vacuum, well plated, and low-resistance carbonization. ANNOTE WITH D8124F810404 Consider for inclusion: gives good insight into early lamp production and problems associated with it. (DH)

Date

1881-04-18

Decade

1880-1889

Type

Identifier

D8123ZAZ

Folder Set

D8123

Title

[D8123ZAZ], Letter from Francis Robbins Upton to Thomas Alva Edison, April 18th, 1881

Microfilm ID

57:853

Publisher

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