Bellevue Interrupterless Transformer Tube (1915-1925) |
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Developed by Machlet & Son of New York city for use with transformers
rather than induction coils (which required an interrupter). As is true of
most late model cold cathode tubes, the anticathode (target) has assumed
the position formally occupied by the anode, i.e., at the end of the tube
opposite the cathode. Note the sharp point projecting forward from the
copper jacket of the target. Its purpose was to allow the tube to employ
high currents (up to 25 amps) without suffering internal damage or loss of
efficiency. Several patent dates, up to 1915, are stamped on the base of
the target.
See "The Trail of the Invisible Light" by Grigg (p 81) |
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