Whereas it has been known hitherto to heat a stream of air so that the hot air may be used for heating an enclosed or open space by burning fluid fuel in the air stream, this form of space heating suffers from the disadvantage that the products of combustion also 5. enter the space with the possible disadvantage of fire hazard, poisoning of any occupants of the space, or of smoke nuicance, and it is the object of the invention to eliminate above mentioned disadvantages.

10. According to one aspect of the invention there is provided means for space heating comprising a chamber within which combustable materials may be burned in air, the chamber having at least one air inlet and an outlet for the products of combustion, and means whereby air may be brought into thermal contact with the outside

1 . of the chamber to be heated thereby and removed therefrom in a stream. Preferably the said means comprises a jacket substantially enclosing the chamber and being provided with an air inlet means an air outlet means a$d a blower means.

20. According to a further aspect of the invention there is provided a method of space heating comprising burnin solid fuel in air in a combustion chamber and removing the products of combustion passing a stream of air over the surface of the chamber for heating by the combustion occuring therein and transferring the thus heated

25. ^' air or water to the space required for heating. Preferably the solid fuel comprises waste material such as wood shavings, cardboard or paper, and coal. ^•

A further aspect of the invention is the flue outlet which utilises 30. heat which is normally lost on a direct flue outlet by continuing to heat surfaces after it has left the actual fire chamber. This also applies to positioning an after burner which may be fitted for burning smoke on initial lighting.

5. The units can be made on cylindrical or rectangular lines to give heat by hot air, hot water, steam, or for cooking, in various sizes and measurements.

Embodiments of the invention will now be described by way of example and with reference to the accompanying drawings of which: Fig. 1 is a perspective view.

Fig. 2 is a vertical section through the longitudinal axis. 5. Fig. 3 is a front view.

Fig. 4 is a perspective view.

Fig. 5 is a front view.

Fig. 6 is a perspective view of the optional oven section.

10. Figures 1 to 3 relate to industrial or heavy domestic use. Figures 4 to 6 relate to light or medium domestic use.

As shown in figure 1 the incinerator heater comprises a combustion chamber (7) surrounded by an air jacket made up by plates ( 11, 13, 31)

15. or water jacket (27). Water inlets and outlets are located on the rear and top respectively as required.

The combustion chamber (7) can comprise of either a cylinder as in fig.1 or on rectangular lines as in fig. I _* , having a door (34) hinged to front plate (11) with optional secondaiy loading door (35)

20. hinged to main door (34).

The front plate (11) also forms, with the rear plate (13) base plate (10) and side plates (31), a jacket whereby air may be entrained around the outer surface of the combustion chamber (7) or alternatively

25- may be used as a cover round water jacket (27).

Solid fuel is introduced into the combustion chamber (7) in use of the aparatus through door (34) oτ (35) and burned therein in air which is introduced through port (36) or alternatively through port (38) by fan assistance. Fan assisted air intake is controlled 30. by thermostat (39). Products of combustion including flame and smoke first travel through smoke burning adaptor (9) which emits flame at rear. This flame in turn helps to burn smoke directed into its path by baffles (24)- Waste gasses then pass through emission escape chamber over heating surfaces (21) and escape through

35. chimney (18).

On initial lighting smoke emission can be reduced by an after burner connected at (22) which in turn continues to heat surfaces ( 1). The function of the after burner can be inspected through

40. inspection glass (23).

Particles of grit can be collected by water trap (19) which is fed from tank (17) the level being controlled by ball cock valve (l6). Any collection of grit can be cleaned through clean out arpertures sealed by removable plates (15). 5. Air for heating as opposed to air for combustion is drawn into the air jacket through inlet (12) by means of a fan and is driven out through outlet (28). Whilst the air is entrained in the space between the jacket and the combustion chamber and heating surfaces ( 1) it is heated by conduction over the wall of the combustion 10. chamber (7) and heating surfaces (21) without being contaminated by products of combustion.

On rectangular light domestic water boilers, water inlets and outlets are connected to plates (3l) as required. A boiling plate .(40) may be added, heat travelling through (41 ) controlled by flap (51) 15. to oven (fig. 6) round oven compartment (43) encased by (44) a-∑xi and returning through outlet (42) into emission escape chamber and continuing to heat surfaces (21). The oven is closed by door (45) which has inset support (46) when lowered. Under the oven is a warming space (47). Inside the oven is an air expansion outlet (52). 20. The oven unit (fig. 6) may be bolted onto the boiler unit (fig. 4)- The oven unit can be released by removing screws (52) for cleaning purposes. Ash in the combustion chamber can be shaken through grates (8) by lever (50) which is connected to grate support by pi ot(49). The ash then drops into ash pan (14)• The emission chamber may 25. be cleaned out by releasing winged nuts (39) thus releasing flaps (38). Flue outlet (18) is cleaned through removable cover (15).

DIAGRAMS

Figure 1 is a perspective view. 30. Figure 2 is a vertical section through the longitudinal axis.

Figure 3 is a front view.

These drawings relate to industrial or heavy domestic use

Figure 4 is a perspective view.

Figure 5 is a front view. 35. Figure 6 is a perspective view of the optional oven section.

These drawings relate to light or medium domestic use.

FIG 7 -. Smoke burning tube

FIG 8 - Sectional cast iron grate incorporating smoke burning tube.

Interpretation

7. combustion chamber

8. grates

9. smoke burning adaptor

10. base plate

11. front plate

12. air inlet duct and fan housing

13. rear plate

14. ash pan 15- removable plates for clean out and inspection

16. ball cock water valve

17. water tank

18. flue outlet

19. water bed

20. rear plate of combustion chamber

21. area for heat exchange

22. arperture for after burner

23. arperture for inspection glass

24. smoke baffle plates

25. air flow baffle plates

26. fire box back plate

27. water jacket

28. hot air outlet

29. top plate

30. strengthening tubes

31 . side plate

32. coil thermostat

33. door hinges

34. primary loading door

35. secondary loading door

36. air intake flap

37. door securing bracket

38. mounting for air intake fan

39. fan control thermostat

40. hot plate

41 . outlet to oven section

42. return from oven section 43 • oven inner casing

44. outer casing

45. oven door

46. oven door stabilising section

Interpretation cont..

4.7. warming conpartment

48. anti expansion plates

49. grate support on pivot

50. lever for rocking grates

51. oven control flap

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