F21H INCANDESCENT MANTLES; OTHER INCANDESCENT BODIES HEATED BY COMBUSTION
Introduced: September 1968
Classification Context
- Section:
- MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- Class:
- LIGHTING
- Subclass:
- INCANDESCENT MANTLES; OTHER INCANDESCENT BODIES HEATED BY COMBUSTION
Description
F21H covers incandescent mantles and other luminous or heat-emitting bodies that operate by heating through direct combustion or flame exposure. This includes gas mantles (typically thorium oxide or similar refractory materials), burner designs for mantle lighting systems, and the structural elements that support incandescent bodies in combustion-based lamps. The classification encompasses both the mantles themselves and the apparatus for maintaining and igniting them, but excludes electric incandescent lamps and non-incandescent combustion lighting (covered under other F21 subclasses).
Scope Notes
Glossary: Incandescent Capable of emitting visible light when heated. Incandescent mantle Incandescent mantles A device comprising a lace-like hood or envelope of thin, porous, refractory material that glows when it is positioned in a flame or otherwise heated by combustion of a distinct combustible material. Light source Light sources The entity (e.g. mantle) that generates light for a lighting device or apparatus. | Application references: Lighting devices or systems thereof, being portable or specially adapted for transportation Non-portable lighting devices; Systems thereof Functional features or details of lighting devices or systems thereof; Structural combinations of lighting devices with other articles, not otherwise provided for Fastening incandescent mantles or other incandescent bodies to lamp parts; Suspension devices for incandescent mantles or other incandescent bodies Arrangements of mantles or other incandescent bodies on burners
Related Keywords
4 direct subcodes
Child Classifications
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