Specification of Samuel Hall : apparatus for supplying air to furnaces.

  • Hall, Samuel.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Samuel Hall : apparatus for supplying air to furnaces. Source: Wellcome Collection.

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    5 Hall's Improvements in tJu Combustion of Fuel and Smoke. pipe w into the chimney, for the purpose of creating a current of air through the fire when it is first lighted, in order to get the steam up in the boiler more expeditiously than is done in the usual way. In some cases, instead of intro¬ ducing a quantity of steam into the chimney for the above purpose by cock 5 and pipe w, I convey it from such other boiler or vessel, and introduce it by a separate pipe which can be let down into the chimney and withdrawn at pleasure. As that part of my improvements which causes a current of air to pass through the fires of locomotive engines when they are at rest would cause 10 a waste of fuel if the steam then generated were allowed to escape into the atmosphere, I make another addition to the apparatus to render the steam so generated available. This consists of a pipe applied also to the boiler, to pass the steam generated by such fuel (which would otherwise be wasted, as above stated) into a system of pipes placed within the water in the tender, 15 thereby heating it previously to its entering into the boiler, and thus forming a component part of my apparatus. I place another valve y. Figure 7, to the boiler, with a lever 2^ attached to it, which is properly weighted, so as to allow the waste steam to pass through the pipe into the tender, instead of escaping into the atmosphere through the safety valve, and at the same time to prevent 20 the pressure of the steam in the boiler from being too much lowered. The steam may, however, if required, be passed with much greater velocity through the pipe into the tender, by reducing the weight on the valve y, or by any ^ other suitable means. B, B, Figures 7 and 9, is a bent metallic plate, which leaves a space C, C, C, between it and the sides and top of the smoke box A; ^5 this plate is perforated with a great number of small holes, their aggregate area being equal at least to the area of the chimney, but I prefer them to be equal to double its area or even more, so as to give a free passage of the gaseous matters through them into the space C, C, C, on their way from the box A to the chimney, and at the same time to prevent the passage from the former to 30 the latter of any large pieces of fuel. D is a pipe, perforated with small holes, and communicating with the force pump by a pipe supplied with a stop-cock; the use of this pipe and cock is to throw a jet of water into the smoke box at pleasure. F, F, is a steam-tight casing around the chimney, through which a portion of the water may be passed on its way from the tender to the boiler for the purpose of being partially heated; this casing may be connected or not with the casing around the smoke box, as described in the Specification of my Patent of the Fourteenth of January One thousand eight hundred and forty- one, and comprised in the eighth claim made therein. G is a pipe to convey