US PATENT SUBCLASS 315 / 5.18
.~.~.~.~ Ray returns to the hollow device; e.g., reflex type

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

1  DF  CATHODE RAY TUBE CIRCUITS {11}
3  DF  .~ Combined cathode ray tube and circuit element structure {2}
4  DF  .~.~ Inductor or distributed parameter-type inductive structure {2}
5  DF  .~.~.~ Ray passes in or through a hollow distributed parameter device {15}
5.18.~.~.~.~ Ray returns to the hollow device; e.g., reflex type {1}
5.19  DF  .~.~.~.~.~> By same path and/or to same aperture {1}

DEFINITION

Classification: 315/5.18

(under subclass 5) Subject matter wherein substantially all of the ray passes from the interior of the hollow device and beyond the exterior of the device, and then returns to the interior of the device.

(1) Note. The ray may return to the hollow device by the same path as it leaves the device as a result of reflection, or the ray may follow a curved path as a result of deflection, or the ray may follow a straight path, the device being formed to intercept the ray after the ray passes out of the device.

(2) Note. For classification in this and the indented subclasses, it is necessary that the ray return to the interior of the device. When the ray merely returns to engage the exterior of the device, classification is in subclasses 5.24+ or 5.33.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.12, for a hollow distributed parameter device with a ray returning thereto as a result of secondary emission.

5.24+, for a hollow distributed parameter device whose ray passing through or in is deflected or reflected. See (2) Note above.

SEE OR SEARCH CLASS 331, Oscillators,

84, for electric wave generating systems utilizing a charged particle or electron beam tube of the reflex type.