US PATENT SUBCLASS 362 / 520
.~.~ Refractor structure

Current as of: June, 1999
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362 /   HD   ILLUMINATION

459  DF  SUPPORTED BY VEHICLE STRUCTURE (E.G., ESPECIALLY ADAPTED FOR VEHICLE) {17}
509  DF  .~ Light modifier {5}
520.~.~ Refractor structure {2}
521  DF  .~.~.~> Plural separate refractors
522  DF  .~.~.~> Plural separate sections with complex surfaces

DEFINITION

Classification: 362/520

Refractor structure:

(under subclass 509) Subject matter wherein the light modifier includes a light pervious material having a pair of opposed refracting surfaces at least one of which is, at least in part, angularly related to the other surface so that the path of a light ray incident on one opposed surface of the material and the path of the same ray after it emerges from the material through the other opposed surface are not parallel.

(1) Note. A refracting surface of this subclass type includes an interface between the material of the refractor and some other material, usually air, in which the speed of light is different.

(2) Note. A refracting surface includes a transparent focusing element consisting of a lens, usually an achromat, with crown glass and flint glass components.

SEE OR SEARCH THIS CLASS, SUBCLASS:

308+, for a refractor having a complex surface.

326, for a refractor.

335+, for a curved lens-type refractor.

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

110+, for electric lights, per se, which include a refractor as an integral part.

343, Communications: Radio Wave Antennas,

753+, for an antennae with spaced or external radio wave retractor, subclass 783 for a waveguide-type antenna with an internal refraction means, and subclasses 909+ for radio wave refracting means.

350, Optics: Systems (Including Communications) and Elements, for an optical element in general,

258+, for a means for illuminating a building interior with a outside light, and subclasses 409+ for a lens.

404, Road Structure, Process, or Apparatus,

22+, for a placement with light admitting means.

428, Stock Material or Miscellaneous Articles,

156+, for a stock material product in the form of a single or plural layer web or sheet including a component of varying thickness, and subclasses 426+ for a nonstructural composite web or sheet embodying one or more layers of glass. [figure] [caption]A - Front surface portion; B- Peripheral wall; C, D, E - Curved portions in up-down and ; left-right direction