US PATENT SUBCLASS 219 / 114
.~.~.~ With space-discharge tube control (e.g., thyratron, ignitron)

Current as of: June, 1999
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219 /   HD   ELECTRIC HEATING

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
78.01  DF  .~ For bonding with pressure (e.g., resistance welding) {16}
108  DF  .~.~ Systems of current supply {7}
114.~.~.~ With space-discharge tube control (e.g., thyratron, ignitron)

DEFINITION

Classification: 219/114

(under subclass 108) Subject matter having a space discharge control tube.

(1) Note. The tube may be, for example, an ignitron or thyratron.

SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems,

246+, for miscellaneous gas tube systems having alternating current supply and consult the search notes thereto for related art.

323, Electricity: Power Supply or Regulation Systems,

291, for miscellaneous space discharge tube type voltage or current control systems.