F
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  
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 fluidised bed combustion apparatus F23C 10/28; condition responsive controls for regulating combustion in domestic stoves with open fires for solid fuel F24B 1/187)
 F23N 1/00
Regulating fuel supply
 F23N 1/02
·  conjointly with air supply
 F23N 1/04
·  conjointly with air supply and with draught
 F23N 1/06
·  conjointly with draught
 F23N 1/08
·  conjointly with another medium, e.g. boiler water
 F23N 1/10
·  ·  and with air supply or draught
 F23N 3/00
Regulating air supply or draught (conjointly with fuel supply F23N 1/00)
 F23N 3/02
·  Regulating draught by direct pressure operation of single valves or dampers
 F23N 3/04
·  by operation of single valves or dampers by temperature-sensitive elements
 F23N 3/06
·  by conjoint operation of two or more valves or dampers (F23N 3/08 takes precedence)
 F23N 3/08
·  by power-assisted systems
 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 5/04
·  ·  using bimetallic elements
 F23N 5/06
·  ·  using bellows; using diaphragms
 F23N 5/08
·  ·  using light-sensitive elements
 F23N 5/10
·  ·  using thermocouples
 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