Cold cathode tube by Victor Chabaud.14” (35 cms) long, 4”(10 cms.)
bulb, with an engraved inscription “V.Chabaud,
Date of manufacture uncertain. Probably around 1905.
Regeneration is by the Villard osmo-regulator.
This tube has only two electrodes, the aluminium cathode and the platinum anode serving as an anti-cathode.
Note the peculiar conical shape of the anode structure, with the flat target on the posterior internal wall of the cone, facing a round anterior opening through which passes the electron beam. The generated x-rays come out of the cone by its wide inferior opening. This tube is probably the oldest known with a hooded anode.
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