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$115.00
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Queen duvet cover (88" x 88") featuring the image "Prototype Fleming Valves, 1904" by Science Source. Our soft microfiber duvet covers are hand sewn and include a hidden zipper for easy washing and assembly. Your selected image is printed on the top surface with a soft white surface underneath. All duvet covers are machine washable with cold water and a mild detergent.
Design Details
The first prototype Fleming valves. The Fleming valve, invented in 1904 by John Ambrose Fleming, as a detector for radio waves in early radio... more
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Average Rating (4.70 Stars):
Antonio Cabos Domingo
April 2nd, 2024
All fine
Paulo Avila
November 16th, 2023
Very good material.
Sharon Broderick
September 29th, 2023
Very happy with the duvet . quality printing ! I also got the shower curtain money well spent !
Carla Rose Kelly
September 6th, 2023
Love this duvet cover in the Tree Fort Suite of the Elk View Lodge, Fernie, BC, Canada.
Carla Rose Kelly
September 6th, 2023
Love this duvet cover in the Tree Fort Suite of the Elk View Lodge, Fernie, BC, Canada.
The first prototype Fleming valves. The Fleming valve, invented in 1904 by John Ambrose Fleming, as a detector for radio waves in early radio receivers, was the first thermionic diode and the first vacuum tube. The basic configuration consisted of an evacuated glass bulb containing two electrodes a cathode in the form of a wire filament heated white-hot by a current through it, and a metal anode usually consisting of a flat plate. Since only the filament produces electrons, the current of electrons through the tube can only pass in one direction, from filament to anode. In these early tubes, the filament is the vertical loop of wire, while the anode has various shapes, such as the coil of wire in the lefthand tube. The caption says "Photograph of the oscillation valves first employed by Dr. J. A. Fleming, FRS, in October 1904, for the rectification of high-frequency electric oscillations as used in wireless telegraphy".
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All duvet covers ship from our production facility within 2 - 3 business days of your order.
$115.00
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