Specification of William Chesterman : stoves.

  • Chesterman, William.
Date:
1855
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Chesterman : stoves. Source: Wellcome Collection.

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    Chesterman s Improvements in Stoves. projecting from the bottom of the vessel k, immediately over and corresponding with the vessel or water box i; o, in Figure 4, is a small hole in the rim ft, about one-eighth of an inch in diameter, to allow the water to pass from the vessel k into the water box i, to supply the loss by evaporation; p is an 5 inverted cup, which works into the water box i in the manner of a gasometer or gasholder ; q is a lever or beam, moving freely on its centre, supported by r, which is fixed on k; one end of q is attached to the centre of the convex top of p, and the other end to the top of a wire s, supporting the horizontal disc t over the aperture u, through which the external air is admitted into the part a 10 to supply the fire. The rod s passes freely through a hole in the end of q, and is prevented passing through it by a nut at the end, resting on the upper side of q. w is a tube projecting from the bottom of k to the same height as the rim ft, in order to allow the rod s to pass freely through the bottom of k, and yet prevent the water from running out, as it would do if there were only a 15 simple hole. In the position of the apparatus in the Drawing, the inverted cup p (being rather heavier than the rod and disc attached to the other end of q) descends in the water box i, and lifts the disc to its greatest height from the aperture u. The vessel k and box i being filled with water nearly to the top * of the rim ft, as shewn by the blue dotted line on the Drawing, and a fire being 20 made in d, the water in i will be first heated, and steam will gradually form in i, and rising into the cup j?, will raise p, and allow s, at the other end of q, to fall and diminish the draft into u, and when the water has attained the temperature of two hundred and twelve degrees, will perfectly close u, when the apparatus will assume the position marked by dotted lines in Figure 4. 25 It is necessary to have a small hole in the top of p, to allow the internal air to escape, so that it may sink into and be filled with the water in the vessel i. As soon as the temperature of the stove and of the water in i falls, for want of a supply of air to the fire, the cup p will fall, and by acting on q, raise the disc t gradually, until the supply of air is such as to maintain the stove at the 30 uniform temperature required. Figure 6 shews another method of making the water box or vessel t, having an additional rim n 2. The cup p dipping into the water contained between the two rims n and n 2, which is supplied from the vessel k through the hole o, would act with less water in the water box i, which in certain cases may be thought desirable. Figure 7 exhibits another 35 form of the apparatus, in which the fire box d is encircled with water, excepting at the bottom, and where the mouth-piece and flue pipe join it; all fittings below the blue water line must therefore be made water-tight. In order to bring the water nearer to the fire, and thereby render the action of p more