Specification of William Losh : furnaces for ovens, steam boilers, &c.

  • Losh, William.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Losh : furnaces for ovens, steam boilers, &c. Source: Wellcome Collection.

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    _LosKs Impts. in Fire-places or furnacesfor Heating Ovens, frc. them. The more equable distribution of heat, and particularly the impossibility of a sudden access of cold air to the heated vessels on opening the fire door to add fuel or to check the ebullition, also tends much to lessen the liability of cracking in cast metal boilers, which is generally the effect of a sudden 5 variation of temperature. . The steady and regular action of the heat when boilers are placed on my principle gives so uniform a degree of elasticity to the steam that an engine with such a boiler will never miss a stroke for want of steam of sufficient expansive power. The action of the heated gases is so powerful when boilers are placed on my plan, and the steam is generated with TO such rapidity, that a boiler which was calculated to work alarge pumpin°* engine at Wallsend Colliery, in the County of Northumberland, on the usual plan, having- been put up under my direction, not only works the engine with facility, with an immense saving of fuel, but seems to be capable of supplying steam to work another engine of equal power. Thus it appears that the saving in the boiler 15 and materials connected with its erection is not alone confined to the wear and tear of such boiler and materials, but that boilers of much less dimensions than those usually employed to produce a given effect will answer the purpose when placed on my construction. The second intention (the saving of fuel) I accom¬ plish by a more regular and sudden distribution of the caloric and heated gases 20 generated by the burning fuel over the surface to be heated, and by preventing their admixture with cold atmospheric air, which in the usual modes of placing- boilers always takes place, and from the known law of the equal distribution of caloric, considerably weakens their effect by combining with and carrying of a part of that substance which otherwise would be, and according to my plan is, 25 transmitted through the boilers, &c., and to the liquids or other substances they contain. According to my plan, the caloric and heated gases ascend and radiate from the burning fuel, and impinge against the boiler or other substance required to be heated with extreme velocity and intensity, as they meet with no substance to direct them from their course, or to which they can impart a portion of their 30 heat. In the common plans, on the contrary, where a current of cold air is forced through the grate room in its passage to the chimney, the heated gases are not only bent from their course but deprived of a considerable portion of their heat, and as they do not come in contact but with a small proportion of the boiler until they have been forced over an area of brickwork or other 35 substance and through a long extent of flues, much more of this most active and penetrating substance must be lost to the vessel intended to be heated and expended in the tendency which the gases have to raise to their own tempera¬ ture the substances with which they come in contact. It is obvious that in the