Specification of Arthur Woolf : steam and other boilers.

  • Woolf, Arthur.
Date:
1854
Catalogue details

Licence: Public Domain Mark

Credit: Specification of Arthur Woolf : steam and other boilers. Source: Wellcome Collection.

    6/24 (page 4)
    Woolf's Improved Apparatus for Converting Water, Qc. into Steam. in a manner somewhat different from the former. In Fig. 5, A is the main cylinder, crossing the smaller cylinders a, a, a, a, a, a, a, a, a, half way between their middles and the ends marked a, but not joined to them at the points at which it crosses them. It is put in this place that it may come over that part of the furnace S, S, S, S, S, S, S, S, through which the flame first passes and 5 receives its direct , action, which it does over nearly a half of its surface, as may be seen by looking at the vertical section A, S, S, Fig. 8. The smaller cylinders have a communication with the main cylinder in the following manner. Three small cylinders C, C, C, are placed parallel to the main cylinder A, over the smaller cylinders a, a, a, a, a, a, a, a, a, in such a manner that each of the 10 cylinders C, C, C, take in three of the smaller cylinders a, a, a, being united to and connected with them by nicks and flanges (or other fit joining), as shewn in Fig. 6, which is a longitudinal vertical section of that part of the apparatus. The cylinders C, C, C, have a direct communication with the main cylinder A by the pipes or tubes P, P, P, as may be better seen by the cross ver- 15 tical section, Fig. 8, in which the same parts are marked with the same letters as in Figs 5 and 6. The three tubes C, C, C, are preferred to one long tube, to prevent any derangement taking place in the furnace or in the tubes, by the expansion and contraction occasioned by changes of tem¬ perature, which would be much more considerable in one tube of the whole 20 length of the furnace than when divided into three portions; and it is for the same reason that the tube A is not made to communicate directly with the ♦ smaller tubes a, a, a, a, a, a, a, a, a, but mediately by means of the tubes marked C and P. N.B.—The two outermost of the tubes marked P may be carried from C to A, from the parts of the tube C marked with the letter m, 25 and instead of going parallel to the middle tube P, may be inclined towards it so as to join the cylinder A near the middle, or any other direction may be given to them to prevent derangement by expansion. (Fig. 15 shews another way of establishing a communication between the different parts of such a boiler. A and C are sections of the cylindric tubes, marked with the same 30 letters in Figs 5 and 6, and the openings c, d, e,f are the places by which they communicate with the lower tubes a, a, a. When this way of making a com¬ munication between the different tubes which compose the prime boiler is adopted, the tube C may be placed directly over the middle of that half of the furnace, and closed in with brickwork, exactly in the same manner as the 35 tube A, Fig. 8, which is placed over the other half of the furnace.) Fig. 7 is a longitudinal vertical section of the boiler and furnace through the center of the axis of the main cylinder, shewing the course which the flame and heated air are forced to take. The first three smaller cylinders are completely surrounded