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.

    7/24 (page 5)
    Woolf's Improved Apparatus for Converting Water, Qc. into Steam. with flame, being directly over the fire; the flame is stopped by the brick¬ work W over the fifth, and forced to pass under it, and then over the sixth, where it again meets with an interruption which forces it to go under the seventh, over the eighth, and partly over, partly under the ninth. It then 5 turns round the end of the longitudinal wall which divides the furnace, and passes over the eighth smaller cylinder, under the seventh, and so on, alternately over and under the other tubes till it reaches the chimney B. The wall that divides the furnace may be seen in Fig. 5, N, N, and at N, Fig. 8. In these boilers, as in the common boilers for steam engines, the water evaporated by 10 the heat must be replaced by water forced in by the usual means; but to insure its reaching the smaller tubes with certainty, the supply is sent directly into them bv the pipe o, o, which has a communication with each of them by a short branch, as shewn in the Drawing, Fig. 5 ; the other ends of the smaller cylinders a, a, a, a, a, a, a, a, a, are fitted with caps, or any proper contrivance 15 that can be taken off occasionally to clean out the boiler. Fig. 9 is another section on a larger scale of one of the tubes, marked C in Figs 5 and 6, shewing a different way of joining it to the lower tubes a, a, a. Here, instead of employing flanges, the branches from the tubes or cylinders a, a, a, are adapted, but not to fit close to parts made to correspond in the tube 0, and the space 20 between them is filled with any proper cement, as a mixture of iron filings, flowers of sulphur, and sal ammoniac, and the tubes a, a, a, and C, are kept secure bv the bolts b, b, b, and the screws and nuts d, d, d. To facilitate the introduction of the cement before mentioned into the joinings of the tubes C and a, holes are made in the cylinder C, opposite the parts to which the 25 tubes a, a, a, are to be joined, large enough to admit a man’s hand ; to these holes are adapted covers, which are secured in their places by the same bolts and nuts that secure the tubes C and a from separating. A very secure and con¬ venient wav for closing the end of the cylindric tubes is shewn in this Figure at f which is the cover of the tube C. It is made of an eliptical form, as is 30 also the opening in the tube C, so that its shortest diameter can enter by the longest diameter of the opening C. ^When introduced, it is then turned in such a manner as to make the longest diameter ot f coincide with the longest diameter of the opening in C, to which it is fitted. * It is then brought home to its place, and secured there by the bolt, the nut, and cross bar, shewn in the 35 Drawing. Fig. 10 is an end view of the tube C, shewing the opening. This method of closing vessels which are to sustain a great internal pressure, is one of the best that can be employed, as the cover fits the closer the greater the pressure; but I do not claim it as new or as any part of my Invention, nor is it material to my Invention in what way the tubes are closed, provided they are