|  | 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.

|  | F21K |
LIGHT SOURCES NOT OTHERWISE PROVIDED FOR

P:0 |  | F21K 2/00 |
Light sources using luminescence (luminescent materials Fulltext... Hierarchy... Expanded...C09K 11/00; selection of luminescent materials for light screens Fulltext... Hierarchy... Expanded...F21V 9/00; using excitation by radioactivity Fulltext... Hierarchy... Expanded...G21H 3/00, Fulltext... Hierarchy... Expanded...H01J 65/00; transforming the wavelength of the light of gas- or vapour-discharge lamps by luminescence Fulltext... Hierarchy... Expanded...H01J 61/38; electroluminescent light sources Fulltext... Hierarchy... Expanded...H05B 33/00) [2,7]

P:10 |  | F21K 5/00 |
Light sources using charges of combustible material, e.g. illuminating flash devices (explosive or thermic compositions Fulltext... Hierarchy... Expanded...C06B; fireworks Fulltext... Hierarchy... Expanded...F42B 4/00; photographic flash units Fulltext... Hierarchy... Expanded...G03B 15/03) [3,5]

P:20 |  | F21K 7/00 |
Other light sources