Reproduction
Title
Fleming Valve
Object Category
Valve
Description
Valve covered externally with copper gauze shield for protection from external electric fields. Filament is small and probably of tantalum. Anode consists of a flat metal plate placed close to one side of filament. Production version with copper flat plate anode with external copper wire gauze screen and bayonet cap. c 1908-1910. Probably metal filament.
Valve covered externally with copper gauze shield for protection from external electric fields. Filament is small and probably of tantalum. Anode consists of a flat metal plate placed close to one side of filament. Production version with copper flat plate anode with external copper wire gauze screen and bayonet cap. c 1908-1910. Probably metal filament.
This is most likely the same '4' valve referred to in Fleming's experimitation notes in Special Collections. If so, then the valve was recieved on 24 June, 1908.
Asbestos Inspection - Non-Asbestos. (this number recorded twice - mistake by inspector?)
Creator
Marconi's Wireless Telegraph Company
Production Date
circa 1908 to circa 1910
Material
Dimensions
Publications
- Thermionic Valve and its Development in Radiotelegraphy and Telephony, 69
Collection
Electronic and Electrical Engineering
Accession Number
LDUSC-EE-2
Alternative Number
1
Administration Name
UCL Science and Engineering Collections
