[W100DEBB], Legal Testimony, Thomas Alva Edison, June 21st, 1881

Item

Abstract

"I first employed a pump embodying this invention in substance at my laboratory during the fall of 1878, but using water instead of mercury as the exhaust agent. In March or April 1879 I conceived of the idea of using it with mercury as the exhaust agent. I immediately made drawings thereof, disclosed it to others and within a few days had mercury pumps made embodying the issue. Such pumps have been made and used, as occasion required, continuously and to a large extent to present time."

Date

1881-06-21

Decade

1880-1889

Identifier

W100DEBB

Folder Set

W100DEB

Title

[W100DEBB], Legal Testimony, Thomas Alva Edison, June 21st, 1881

Microfilm ID

Publisher

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