|  | 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

|  | F23 |
COMBUSTION APPARATUS; COMBUSTION PROCESSES

|  | F23 |
Note(s) In this class, the following terms or expressions are used with the meanings indicated: "combustion" means the direct combination of oxygen gas, e.g. in air, and a burnable substance. Any other heat-producing combination of chemical substances, e.g. hydrogen peroxide and methane, iron oxide and aluminium, is covered by section C or by subclass Fulltext... Hierarchy... Expanded...F24J; "combustion chamber" means a chamber in which fuel is burned to establish a self-supporting fire or flame and which surrounds that fire or flame; "burner" means a device by which fluent fuel is passed to a combustion space where it burns to produce a self-supporting flame; "air" means a mixture of gases containing free oxygen and able to promote or support combustion.

|  | F23Q |
IGNITION (devices for igniting matches Fulltext... Hierarchy... Expanded...A24F; explosive or thermic compositions Fulltext... Hierarchy... Expanded...C06B; chemical igniters Fulltext... Hierarchy... Expanded...C06C; devices or installations peculiar to internal-combustion engines, except glowing plugs, Fulltext... Hierarchy... Expanded...F02P); EXTINGUISHING DEVICES

|  | F23Q |
Subclass index
IGNITERS |
Mechanical | 1/00
Using electric sparks | 3/00, 5/00
Incandescent | 7/00
With pilot flame | 9/00
By catalysis | 11/00
Other | 13/00
REMOTE IGNITION | 21/00
TESTING | 23/00
LIGHTERS CONTAINING FUEL | 2/00, 3/00, 7/00
EXTINGUISHING DEVICES | 25/00

P:80 |  | F23Q 1/00 |
Mechanical igniters (lighters containing fuel Fulltext... Hierarchy... Expanded...F23Q 2/00; matches Fulltext... Hierarchy... Expanded...C06F)

P:70 |  | F23Q 2/00 |
Lighters containing fuel, e.g. for cigarettes

P:40 |  | F23Q 3/00 |
Igniters using electrically-produced sparks (sparking-plugs Fulltext... Hierarchy... Expanded...H01T 13/00)

P:30 |  | F23Q 5/00 |
Make-and-break ignition, i.e. with spark generated between electrodes by breaking contact therebetween (specially adapted for internal-combustion engines Fulltext... Hierarchy... Expanded...F02P 15/00)

P:50 |  | F23Q 7/00 |
Incandescent ignition; Igniters using electrically-produced heat, e.g. lighters for cigarettes; Electrically-heated glowing plugs

P:60 |  | F23Q 9/00 |
Pilot flame igniters

P:10 |  | F23Q 11/00 |
Arrangement of catalytic igniters (catalytic igniters per se Fulltext... Hierarchy... Expanded...C06C)

P:90 |  | F23Q 13/00 |
Igniters not otherwise provided for

P:20 |  | F23Q 21/00 |
Devices for effecting ignition from a remote location

P:0 |  | F23Q 23/00 |
Testing of ignition installations (peculiar to internal-combustion engines Fulltext... Hierarchy... Expanded...F02P 17/00; testing of sparking plugs Fulltext... Hierarchy... Expanded...G01M 19/02)

P:100 |  | F23Q 25/00 |
Extinguishing devices, e.g. for blowing-out or snuffing candle flames (for cigarettes Fulltext... Hierarchy... Expanded...A24F)