|  | F |
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

|  | F01 - F04 |
Subsection index
MACHINES |
positive displacement |
rotary or oscillating piston |
liquid and elastic fluid or elastic fluid | F01C
liquid only | F04C
reciprocating piston or other |
liquid and elastic fluid or elastic fluid | F01B
liquid only | F04B
non-positive displacement |
liquid and elastic fluid or elastic fluid | F01D
liquid only | F03B
ENGINES |
positive displacement |
rotary or oscillating piston |
liquid and elastic fluid or elastic fluid | F01C
liquid only | F03C
reciprocating piston or other |
liquid and elastic fluid or elastic fluid | F01B
liquid only | F03C
non-positive displacement |
liquid and elastic fluid or elastic fluid | F01D
liquid only | F03B
PUMPS |
positive displacement |
rotary or oscillating piston | F04C
reciprocating piston or other | F04B
non-positive displacement | F04D

LIGHTING; HEATING

|  | F21 |
LIGHTING (electric aspects or elements, see section H, e.g. electric light sources Fulltext... Hierarchy... Expanded...H01J, Fulltext... Hierarchy... Expanded...H01K, Fulltext... Hierarchy... Expanded...H05B)

|  | F21 |
Note(s) Attention is drawn to Note III of Section H, and in particular that subclass Fulltext... Hierarchy... Expanded...H05B covers electrical aspects of the same technical subjects that are covered by class Fulltext... Hierarchy... Expanded...F21.

|  | F21L |
LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION (burners Fulltext... Hierarchy... Expanded...F23D) [1,7]

|  | F21L |
Note(s) This subclass covers devices or systems designed or specially adapted to be carried, e.g. by hand, or otherwise transported from place to place, e.g. on wheeled supports, in order to provide illumination as and where required. [7] This subclass does not cover devices or systems intended for fixed installation, e.g. vehicle lighting, or for use essentially at a permanent location, which are covered by subclass Fulltext... Hierarchy... Expanded...F21S. [7] Non-electric lighting devices are classified in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F21L 17/00-F21L 26/00 only if a special adaptation related to the use of a non-electric light source is of interest. [2009.01]

|  | F21L |
Subclass index
ELECTRIC DEVICES |
Systems | 2/00
with self-contained batteries or cells | 4/00
with built-in generators | 13/00
without self-contained power source | 14/00
NON-ELECTRIC DEVICES |
Torches, flares; lanterns | 17/00; 19/00
Pocket-lamps; miners' hand-lamps | 21/00; 23/00
Other portable lighting devices or systems thereof | 26/00
COMBINATIONS OF ELECTRIC AND NON-ELECTRIC DEVICES | 27/00

P:10 |  | F21L 2/00 |
Systems of electric lighting devices (systems employing both electric and non-electric light sources or exchangeable light sources Fulltext... Hierarchy... Expanded...F21L 27/00) [7]

P:20 |  | F21L 4/00 |
Electric lighting devices with self-contained electric batteries or cells [7]

P:30 |  | F21L 13/00 |
Electric lighting devices with built-in electric generators (with solar cells Fulltext... Hierarchy... Expanded...F21L 4/00) [1,7]

P:40 |  | F21L 14/00 |
Electric lighting devices without a self-contained power source, e.g. for mains connection [7]

P:80 |  | F21L 17/00 |
Non-electric torches; Non-electric flares

P:70 |  | F21L 19/00 |
Lanterns, e.g. hurricane lamps or candle lamps (candle holders Fulltext... Hierarchy... Expanded...F21V 35/00)

P:60 |  | F21L 21/00 |
Non-electric pocket-lamps, e.g. lamps producing sparks

P:50 |  | F21L 23/00 |
Non-electric hand-lamps for miners

P:90 |  | F21L 26/00 |
Non-electric portable lighting devices, or systems thereof, not provided for in groups Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...F21L 17/00-F21L 23/00 [8]

P:0 |  | F21L 27/00 |
Lighting devices or systems, employing combinations of electric and non-electric light sources; Replacing or exchanging electric light sources with non-electric light sources or vice versa in lighting devices or systems