Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Furnishings (hierarchy name)
5. furnishings (works)
6. [furnishings by form or function]
7. lighting equipment
8. lighting devices
9. [lighting devices by form]
10. lamps (lighting devices)
11. [lamps by form]
12. mechanical lamps

Anotations

Scope note:

Mechanical lamps similar to Carcel lamps in that they contain a clockwork movement in the base actuating a pump which forces oil through a tube from the reservoir to the wick. The distinction between Diacon and Carcel lamps is unclear.