Specification of Samuel Hall : boilers, furnaces and flues.

  • Hall, Samuel.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Samuel Hall : boilers, furnaces and flues. Source: Wellcome Collection.

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    Hall’s Improvements in Boilers, Furnaces, Flues, ffc.___ sphere through the usual safety valve, weighted say the same as valve JP, it is prevented so doing by the valve Q, and caused to descend into the ash pit, where it reduces the quantity of steam generated by decreasing the supply of air passed through the fire bars, that being done by substituting the waste steam into the ash pit in lieu of air in quantities proportioned to the surplus 5 of steam generated. I will now proceed to describe the different members of my “ Improvements in Apparatus for Preventing Explosions of Steam Boilers and other Accidents to which they are liable,” in the same order as I have stated the causes from which they arise. . • 1 My first improvement for effecting the above purpose consists in the sup¬ plying of boilers with water (and at the same time measuring it) in an unerring manner, which is not the case with the usual pumps or other feeding apparatus. The apparatuses for effecting this part of my improvements are of two kinds; the firsfc operates by the opening and shutting of cocks, and the 15 other performs the same operation by the opening and shutting of valves. The first-mentioned apparatus is shewn by the accompanying Drawing, Figure 1, Sheet 2, which is partly in section and partly otherwise. A, A, is the top of a steam boiler. B is a cylindrical vessel to be alternately filled with water and emptied into the boiler in a manner hereafter to be described; go and C and D are two double-way cocks attached to it by flanches, for effecting that process. E is a pipe with two passages a and 6, which connect the vessel B by means of cock D with the boiler; the pipe or passage a connects that vessel and the boiler at their bottoms, and the passage b and pipe c connect them at their tops. F is another pipe, which by means of cock C and pipe d, 25 connects the bottoms of vessel B and cistern G, pipe e at the same time connecting the top of vessel B with the atmosphere. H and I, Figures 1 and 2, are two spur wheels keyed upon the spindles of the cocks C and D, and J is another wheel keyed on shaft /; it has a proper number of teeth ' placed in the required situations for working into the other wheels for shut- 30 ting and opening the cocks alternately, as will be hereafter explained. K is a bevel wheel keyed also on the shaft /, and L is another bevel wheel working into it, being keyed upon the vertical shaft g; this is turned round by the shaft h, by means of the cones i and j, and the belt k. The whole is put in motion by the pulley l and belt m, the latter being moved by any suitable means. 35 The following is the operation of the above-described apparatus:—The cistern G is to be constantly kept full of water by any convenient means for the supply of water to the boiler by means of the vessel B, which supply is effected in the following manner:—When the pulley m is put in motion it