H01K - Definition 
Definition statement
This subclass covers:
Sources of visible, ultra-violet or infra-red radiation consisting of one or more bodies heated to incandescence by electricity, i.e. incandescent lamps, including such lamps for purposes other than general lighting.
Details of electric incandescent lamps, including ancillary devices that are structurally part of the lamp such as optical light modifiers or circuit elements.
Apparatus or processes adapted to the manufacture, installing, removal or maintenance of incandescent lamps or parts thereof.
References relevant to classification in this subclass
This subclass does not cover:
Details or apparatus or processes for manufacture applicable to both discharge devices and incandescent lamps | H01J |
Lamps with light-emitting discharge path and separately-heated incandescent body within a common envelope, e.g. for simulating daylight | H01J 61/96 |
Lamps with spaced electrodes heated to incandescence by light-emitting discharge, e.g. tungsten arc lamps | H01J 61/98 |
Electric light sources using a combination of incandescent and other types of light generation | H05B 35/00 |
Functional features or details of lighting devices or systems thereof | F21V |
Structural combinations of lighting devices with other articles, not otherwise provided for | F21V 33/00 |
Incandescent filaments used to form characters in indicating arrangements | G09F 9/307 |
Informative references
Attention is drawn to the following places, which may be of interest for search:
Lamp holders | H01R 33/00 |
Electric lighting not otherwise provided for | H05B |
Circuit arrangements for electric light sources in general | H05B 37/00 |
Circuit arrangements or apparatus for operating incandescent light sources not adapted to a particular application | H05B 39/00 |
Circuit arrangements for light sources not otherwise provided for | H05B 43/00 |
Glossary of terms
In this subclass, the following terms or expressions are used with the meaning indicated:
| Lamp | "Lamp" includes tubes emitting ultra-violet or infra-red light. |