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One of Fleming's first thermionic diode valves, 1889

One of Fleming's first thermionic diode valves, 1889

1889
One of Fleming's first thermionic diode valves, 1889

One of Fleming's first thermionic diode valves, 1889

1889
One of Fleming's first thermionic diode valves, 1889

One of Fleming's first thermionic diode valves, 1889

1889
Three original thermionic valves invented by Sir John Ambrose Fleming, 1889

Three original thermionic valves invented by Sir John Ambrose Fleming, 1889

1889
Fleming Oscillation Valve

Fleming Oscillation Valve

1905
Fleming Oscillation Valve

Fleming Oscillation Valve

1905
Fleming Oscillation Valve

Fleming Oscillation Valve

1906
Fleming diode

Fleming diode

1905
Fleming Diode

Fleming Diode

circa 1907
Fleming Oscillation Valve

Fleming Oscillation Valve

Fleming Diode

Fleming Diode

circa 1907
Fleming Diode

Fleming Diode

Fleming Diode

Fleming Diode

circa 1907
Fleming Diode

Fleming Diode

1908
Fleming Diode

Fleming Diode

Fleming Diode

Fleming Diode

Fleming Oscillation Valve

Fleming Oscillation Valve

1906
Fleming Oscillation Valve

Fleming Oscillation Valve

1905
Original Fleming diode, 60 S16, (RMW/A1A - McVitie Weston number), by The Edison and Swan Electric Light Company Limited, c.1904, invented by Sir (John) Ambrose Fleming and used by Fleming in October 1904.

Fleming diode

1904
Fleming lamp, (no McVitie Weston number), by unknown maker, invented by Sir John Ambrose Fleming.

Fleming lamp from the McVitie Weston valve collection

[Letters, 1922 Nov 1 to 1938 Nov 28] / J.A. Fleming. [Letters from the Science Museum accession file (ScM 678) regarding examples of thermionic valves, cymometer and model of Sturgeon's first electro-magnet given by Fleming to the museum. Includes some correspondence on the Dewar vacuum flask. 19 items]

Letters, 1922 Nov 1 to 1938 Nov 28, J.A. Fleming

1922-1938
[Letter] 1900 May 25, Pender Electrical Engineering Laboratory, University College, Gower Street, London [to] S.C.J. Freeman Matthews, Camps Bay Electric Tramways, Cape Town / Dr. J.A. Fleming. [Sends his autograph. Mounted, with envelope, on backing paper]

Letter 1900 May 25

1900