Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. furnishings components
7. lighting device components

Anotations

Scope note:

Disc-shaped wheels on lighting device burners at the outer end of a shaft by means of which the shaft and its wick wheel or wheels can be turned manually; in some burners a simple loop of the shaft replaces the wheel.