US PATENT SUBCLASS 315 / 39.57
.~.~.~ Electron emission type

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

32  DF  COMBINED LOAD DEVICE OR LOAD DEVICE TEMPERATURE MODIFYING MEANS AND ELECTRICAL CIRCUIT DEVICE STRUCTURE {19}
39.51  DF  .~ Distributed parameter resonator-type magnetron {10}
39.55  DF  .~.~ Variable tuning {3}
39.57.~.~.~ Electron emission type

DEFINITION

Classification: 315/39.57

(under subclass 39.55) Devices in which an electron emissive means is provided to project electrons into or adjacent the space formed by the distributed impedance structure to change the tuning or impedance of the distributed impedance structure.

(1) Note. The electron emissive means must be in addition to the cathode of the device in order to be classified in this subclass. It may be a secondary electron emissive means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.23, for cathode-ray tube circuits including a hollow distributed parameter device having a flexible wall adjustable for tuning purposes, and wherein the ray passes through or in and returns to the device, the flexible wall being thermally controlled.

39.63, for other discharge devices under subclass 39.51 which are provided with an auxiliary anode, or cathode, or control

electrode or secondary emitter electrode.