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Experimental Fleming Valve, by J.A. Fleming, England, c. 1889

Inventory Number: 85593

85593-2t 85593-1t

Date: c. 1889

Maker Details: Attributed to Prof. J.A. Fleming.

Inscription: None

Size: 240 mm in overall height

Materials: Glass, nickel, steel, ebonite, wood.

Other Given Number(s): Christie's 188.


Experimental Fleming Valve with single vertically-mounted nickel-plated flat anode in single-loop filament, on polished black ebonite base, with ring-turned wood plinth, and three wires forming legs. Glass bulb slightly loose in ebonite base.

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