US PATENT SUBCLASS 313 / 157
.~.~ Concentrically arranged electrode with axial field


Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

153  DF  WITH MAGNETIC DEVICE {4}
156  DF  .~ Field transverse to discharge {1}
157.~.~ Concentrically arranged electrode with axial field {1}
158  DF  .~.~.~> Pole pieces facing electrode ends {1}


DEFINITION

Classification: 313/157

(under subclass 156) Subject matter in which one or more elongated tubular electrodes (e.g., anode and/or grid) surrounds another elongated electrode (e.g., cathode), the magnetic means being arranged to generate a magnetic field which extends along the axis of the elongated electrodes.