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 fluidF01C
liquid onlyF04C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF04B
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
ENGINES
positive displacement
rotary or oscillating piston
liquid and elastic fluid or elastic fluidF01C
liquid onlyF03C
reciprocating piston or other
liquid and elastic fluid or elastic fluidF01B
liquid onlyF03C
non-positive displacement
liquid and elastic fluid or elastic fluidF01D
liquid onlyF03B
PUMPS
positive displacement
rotary or oscillating pistonF04C
reciprocating piston or otherF04B
non-positive displacementF04D
  
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 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.

 F23N
REGULATING OR CONTROLLING COMBUSTION (control devices specially adapted for combustion apparatus in which combustion takes place in a fluidised bed of fuel or other particles F23C 10/00; condition responsive controls for regulating combustion in domestic stoves with open fires for solid fuel F24B 1/00)
P:0 F23N 1/00
Regulating fuel supply
 F23N 1/02
·  conjointly with air supply
 F23N 1/08
·  conjointly with another medium, e.g. boiler water
P:10 F23N 3/00
Regulating air supply or draught (conjointly with fuel supply F23N 1/00)
P:20 F23N 5/00
Systems for controlling combustion (F23N 1/00, F23N 3/00 take precedence)
 F23N 5/02
·  using devices responsive to thermal changes or to thermal expansion of a medium
 F23N 5/08
·  ·  using light-sensitive elements
 F23N 5/12
·  ·  using ionisation-sensitive elements, i.e. flame rods
 F23N 5/14
·  ·  using thermo-sensitive resistors
 F23N 5/16
·  using noise-sensitive detectors
 F23N 5/18
·  using detectors sensitive to rate of flow of air or fuel
 F23N 5/20
·  with a time programme acting through electrical means, e.g. using time-delay relays
 F23N 5/22
·  with a time programme acting through mechanical means, e.g. using cams
 F23N 5/24
·  Preventing development of abnormal or undesired conditions, i.e. safety arrangements (F23N 5/02-F23N 5/18 take precedence)
 F23N 5/26
·  Details