Specification of Samuel Hall : apparatus for generating steam, gases, &c.

  • Hall, Samuel
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Samuel Hall : apparatus for generating steam, gases, &c. Source: Wellcome Collection.

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    Hall's Improvements in Apparatus for Generating Steam, Qc. reduced to the same density as the former. It is evident, then, that the capacity of the working cylinder must be of a proper relative proportion to that of the atmospheric cylinder. I use an atmospheric cylinder and a working cylinder of the dimensions already mentioned, with one hundred and fifty pounds pressure 5 upon the square inch. It is obvious, that in the above illustration, where no fire is applied nor steam produced, the relative sizes of the atmospheric cylinder and working cylinder pointed out must be proper; but when heat is applied and steam produced to pass along with the heated gasses into the working cylinder, the relative proportions of the capacities of the two vessels must be very 10 different, as above stated. • • Having given the general description or summary account of the principal parts of my apparatus, as mentioned in an early part of this Specification, I now proceed to give a particular description and detailed account of the more minute parts of my apparatus by referring to the annexed Drawings. In order 15 to do this, I shall, firstly, describe all the parts of the atmospheric cylinder; secondly, all the parts of the generator; thirdly, all the parts of the reservoir; fourthly, all the parts of the working cylinder, and then proceed to shew how they are all connected together, and in what manner they act to produce the effects I have described; similar letters and numerals being used to denote 20 similar parts of the apparatus in all the Figures, whether in the plan, the elevation, or the section thereof, some parts of the apparatus being shewn in one Figure only, and some in another, while others are shewn in several Figures. Firstly, the atmospheric cylinder A, Figures 1 and 2, is composed of a 25 cylinder H, with flanches at the top and bottom, to which are attached by screw bolts a cover I and a bottom J, the latter having four ears or projections g, g, g, g, to support the whole vessel by four pillars L, L, &c. placed underneath. One of the pipes Z, Z, branches from the cover, and the other from the bottom of the atmospheric cylinder; both of which are united by flanches to pipes P, P, 30 &c., which lead to and connect with the bottom of the generator, as will be hereafter explained. In the cover of the atmospheric cylinder are fixed two valves a, 5, and two similar ones are fixed in the bottom; the valves a opening inwards, to admit the atmospheric air into the cylinder, and the valves b opening outwards, to allow the air to pass from it into the pipes Z, Z, from them to the 35 pipes P. P, &c., connected therewith, and leading to the bottom of the gene¬ rator ; c is a piston, with a piston rod d, which works through a stuffing box on the cylinder cover, and is connected with one end of the working beam G, a, by the working of which it is put in motion; and at the other end of the beam is attached a rod connecting it with a fly wheel fixed on a shaft, for com muni-
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