F21H INCANDESCENT MANTLES; OTHER INCANDESCENT BODIES HEATED BY COMBUSTION
Introduced: September 1968
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).
IPC and CPC are identically structured here. All 4 subcodes exist in both systems.
1 shared codes have differing titles between IPC and CPC.
Child Classifications
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- F21H 1/00 Incandescent mantles; Selection of imbibition liquids therefor +1 CPC IPC+CPC Available in IPC and CPC
- F21H 3/00 Manufacturing incandescent mantles; Treatment prior to use, e.g. burning-off; Machines for manufacturing IPC+CPC Available in IPC and CPC
- F21H 5/00 Solid incandescent bodies (incandescent mantles F21H1/00) IPC+CPC Available in IPC and CPC