Specification of James Neville : apparatus for generating steam.

  • Neville, J. (James)
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of James Neville : apparatus for generating steam. Source: Wellcome Collection.

    5/10 (page 3)
    Nevilles Improvements in Boilers or Apparatus for Generating Steam. man-hole or aperture T, Fig. 4, left near the bottom of the external cylinder or case A, A, A, A, for cleaning out the said apparatus, when required, and which is closed in the usual manner; the top plate B, B, B, B, Fig. 2, of the fire¬ place B, Fig. 1 and 2, is perforated with a sufficient number of circular holes, 5 which I recommend shall not exceed 2\ inches diameter, the centre hole to be left larger, say 6 inches diameter, as shewn in the ground plan, Fig. 2; into these holes are inserted an equal number of thin copper or other metallic tubes or pipes, as shewn in the section, Fig, 1, and marked D, D, D, D, &c.; these terminate and are inserted in the circular metallic plate E, E, Fig. 1, at top, and 10 which is perforated with a corresponding number of apertures or holes; the plate E, E, Fig. 1, is surmounted by the copper or other metallic dome F, F, Fig. 1, from which three or more elbow pipes, as shewn by G, G, Fig. 1, project, and are connected to the descending pipes or tubes H, H, Fig. 1, which pass through the bottom of the external cylinder or case A, A, A, A, Fig. 1 and 2, 15 the said bottom being elevated about 6 inches on brick-work, or on a cast-iron bed, as shewn by I, I, Fig. 1 and 4, and which is closed on all sides except at the flue K, Fig. 1 and 4 ; the water in the said apparatus A, A, A, A, Fig. 1, is maintained to the height marked L, L, Fig. 1, so that the dome F, F, and all the pipes or tubes already described, continue immersed therein ; through the g-0 interior of these pipes or tubes the draught passes or the flame, heated air, or gases ascends through the small pipes D, D, D, D, &c., Fig. 1, to the dome F, F, thence through the elbow pipes G, G, descending through the pipes H, H, to the bottom of the apparatus, where the draught passes off through the flue K to a stack or chimney, if required ; the course of such draught is shewn by 25 arrows in the section, Fig. 1 ; the number and capacity or area of the said tubes or pipes must in all cases bear a proportion to the extent of draught required, and their total external surface should not be less than four square feet for generating steam for each horse power, if applied to condensing engines, and one-half of such proportion for high pressure engines. In order to expand, 30 rarity, or increase the volume of the steam after it has been formed in the said apparatus, I cause it to descend through the pipe M, M, Fig. 1, which passes through the top of the dome F, F, Fig. 1, thence through the centre tube, which is made of sufficient diameter for this purpose; the steam pipe M, M, Fig. 1, terminates with the oblate sphere N, Fig. 1, which is placed a short distance 35 above the fire, and from whence the steam so rarified is conveyed by the pipe 0, as shewn by the dotted lines in Fig. 4, which then passes through the top of the door frame P, P, Fig. 2 and 4; the centre tube should be at least 2 inches more in diameter than the steam pipe M, M, Fig. 1, so that the flame or heat