US PATENT SUBCLASS 315 / 39.61
.~.~.~ Movable tuning element (e.g., slug)

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}
39.61.~.~.~ Movable tuning element (e.g., slug)

DEFINITION

Classification: 315/39.61

(under subclass 39.55) Devices which are provided with a movable tuning element which may be moved to and from or within the distributed impedance structure to vary the tuning or impedance.

(1) Note. This subclass does not include magnetrons where the only movable structure is a part of the distributed impedance structure. For example, in a cavity resonator if only the dimensions of the structure forming the cavity are varied, the patent is excluded from this subclass. If a tuning element is inserted into or near the cavity to vary the tuning, the patent is included in this subclass. The excluded subject matter will be found in subclasses 39.55 or

39.57.

SEE OR SEARCH THIS CLASS, SUBCLASS:

39.55, see (1) Note.

39.59, for this subject matter where the means for moving the tuning element is a thermal or magnetic actuator.

SEE OR SEARCH CLASS 313, Electric Lamp and Discharge Devices,

146+, for miscellaneous discharge devices which have a movable electrode or shield.

336, Inductor Devices,

20, 30+, 45, 75+, and 130+ for inductors which are provided with a movable element other than the coil structure for varying the inductive impedance.